Day and night
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This document summarizes the causes of day and night on Earth. It explains that day and night occur due to the rotation of the Earth on its axis and its revolution around the sun. The Earth rotates approximately every 24 hours, while revolving around the sun once every 365 days. The document also discusses how the tilt of the Earth's axis and its eccentric orbit affect the length of days and nights in different parts of the world throughout the year. Equinoxes occur when days and nights are approximately equal in length, while solstices mark the longest and shortest days of the year in each hemisphere.
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Day and Night by Pascale
Day occurs when the side of the Earth is facing the sun, providing light, while night occurs on the side facing away, resulting in darkness. Nocturnal animals are active at night and sleep during the day. The sun gives us light and warmth during the day and powers many things on Earth. At night, the moon and stars can be seen, with the moon reflecting sunlight and stars being distant balls of gas. Different places on Earth experience night and day at opposite times due to the planet's rotation.
Solstices & Equinoxes
The document discusses the earth's solstices and equinoxes. The winter solstice occurs on December 21/22 and has the shortest day of the year. The summer solstice is on June 21/22 and has the longest day. The equinoxes happen around March 21 and September 22, marking equal amounts of day and night and the first days of spring and fall.
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The Earth spins on its axis in a counterclockwise direction when viewed from above the North Pole. This rotation causes day and night as different parts of the Earth face toward and away from the Sun. During the equinoxes in spring and fall, day and night are equal in length for all areas. During the solstices in summer and winter, locations in the Northern Hemisphere experience their longest day or night of the year, with the North Pole receiving 24 hours of sunlight or darkness, while the opposite is true in the Southern Hemisphere. The tilt of the Earth's axis is what causes the variations in day length throughout the year.
Day and night
The document discusses day and night on Earth and the causes of seasons. It explains that the Earth's rotation on its axis causes day and night, with the side facing the sun experiencing day and the other side experiencing night. It also notes that the Earth is tilted on its axis and revolves around the sun, and that this tilt is what causes the seasons by changing how much sunlight different parts of the Earth receive throughout the year.
Solstice and equinox
Equinoxes occur twice yearly when the sun is directly above the equator and day and night are approximately equal in length. Solstices occur twice yearly when the sun reaches its highest or lowest point in the sky, resulting in the longest and shortest days of the year in the summer and winter respectively in each hemisphere. The document then provides details on the timing and effects of the summer and winter solstices and spring and autumnal equinoxes in both hemispheres.
How does earth's motion cause day and night?
The Earth's rotation on its axis causes day and night. As the Earth spins, one side constantly faces the sun and experiences day while the other side faces away from the sun and experiences night. This rotation takes place every 24 hours, with each rotation constituting a full day and night cycle. The apparent movement of the sun and moon is actually due to the Earth's rotation, not their movement.
Day and night
The document discusses how day and night occur on Earth due to its rotation, with one side facing the sun experiencing day and the other side experiencing night. It also explains how the Earth's 23.5 degree tilt on its axis, combined with its revolution around the sun, causes the seasons. During summer in each hemisphere, that hemisphere is tilted toward the sun, resulting in longer days and warmer weather, while the opposite hemisphere experiences winter. The tilt also means the poles experience extended periods of daylight or darkness around the summer and winter solstices.
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Day and Night by Pascale
Day occurs when the side of the Earth is facing the sun, providing light, while night occurs on the side facing away, resulting in darkness. Nocturnal animals are active at night and sleep during the day. The sun gives us light and warmth during the day and powers many things on Earth. At night, the moon and stars can be seen, with the moon reflecting sunlight and stars being distant balls of gas. Different places on Earth experience night and day at opposite times due to the planet's rotation.
Solstices & Equinoxes
The document discusses the earth's solstices and equinoxes. The winter solstice occurs on December 21/22 and has the shortest day of the year. The summer solstice is on June 21/22 and has the longest day. The equinoxes happen around March 21 and September 22, marking equal amounts of day and night and the first days of spring and fall.
Day_Night
The Earth spins on its axis in a counterclockwise direction when viewed from above the North Pole. This rotation causes day and night as different parts of the Earth face toward and away from the Sun. During the equinoxes in spring and fall, day and night are equal in length for all areas. During the solstices in summer and winter, locations in the Northern Hemisphere experience their longest day or night of the year, with the North Pole receiving 24 hours of sunlight or darkness, while the opposite is true in the Southern Hemisphere. The tilt of the Earth's axis is what causes the variations in day length throughout the year.
Day and night
The document discusses day and night on Earth and the causes of seasons. It explains that the Earth's rotation on its axis causes day and night, with the side facing the sun experiencing day and the other side experiencing night. It also notes that the Earth is tilted on its axis and revolves around the sun, and that this tilt is what causes the seasons by changing how much sunlight different parts of the Earth receive throughout the year.
Solstice and equinox
Equinoxes occur twice yearly when the sun is directly above the equator and day and night are approximately equal in length. Solstices occur twice yearly when the sun reaches its highest or lowest point in the sky, resulting in the longest and shortest days of the year in the summer and winter respectively in each hemisphere. The document then provides details on the timing and effects of the summer and winter solstices and spring and autumnal equinoxes in both hemispheres.
How does earth's motion cause day and night?
The Earth's rotation on its axis causes day and night. As the Earth spins, one side constantly faces the sun and experiences day while the other side faces away from the sun and experiences night. This rotation takes place every 24 hours, with each rotation constituting a full day and night cycle. The apparent movement of the sun and moon is actually due to the Earth's rotation, not their movement.
Day and night
The document discusses how day and night occur on Earth due to its rotation, with one side facing the sun experiencing day and the other side experiencing night. It also explains how the Earth's 23.5 degree tilt on its axis, combined with its revolution around the sun, causes the seasons. During summer in each hemisphere, that hemisphere is tilted toward the sun, resulting in longer days and warmer weather, while the opposite hemisphere experiences winter. The tilt also means the poles experience extended periods of daylight or darkness around the summer and winter solstices.
Rotation and day and night
The Earth has two types of movements: rotation around its axis, which takes 24 hours and results in the cycle of day and night as different parts of the Earth face the sun, and rotation around the sun in its orbit. The Earth's axis is an imaginary line passing through the north and south poles. When a part of the Earth faces the sun it is daytime, and when a part faces away it is night.
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Please note that there are many gif images, which would work only when downloaded, like in the second slide
Reasons for the seasons notes
The document discusses the causes of seasons. It explains that seasons are not due to variations in Earth's distance from the sun, as some believe, but are instead caused by the tilt of Earth's 23.5 degree axis. This tilt results in changes in the amount of incoming solar radiation (insolation) and the angle at which the sun's rays strike different locations throughout the year, causing the seasons to change. Specifically, when a hemisphere is tilted toward the sun it experiences summer, and when tilted away it experiences winter.
Revolutaion around the sun
The Earth revolves around the sun over the course of 365.25 days. As it orbits the sun, different parts of the Earth experience different seasons due to changes in the amount of direct sunlight. On June 21st in the Southern Hemisphere, it is the winter solstice, meaning they have their longest night and shortest day of the year.
Motions and seasons of earth
The Earth has two main motions that affect its seasons: rotation, which causes day and night, and revolution around the Sun. The tilt of the Earth's axis of rotation combined with its revolution cause the seasons by changing which hemisphere receives more direct sunlight throughout the year. The solstices mark the summer and winter beginning in each hemisphere when the Sun is at its maximum northern and southern declinations, while the equinoxes occur when day and night are equal in length as the Sun crosses the celestial equator.
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The document discusses the causes of seasons on Earth. It is caused by the 23.5 degree tilt of the Earth's axis as it revolves around the sun. During part of the year, the northern hemisphere leans more directly towards the sun, experiencing summer, while the southern hemisphere experiences winter. Then half a year later, the situation is reversed. The tilt of the axis causes the sun's rays to strike different parts of the Earth at different angles throughout the year, affecting the distribution of heat and resulting in seasonal temperature changes.
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The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - summer, winter, spring and fall. The seasons are not caused by variations in Earth's distance from the sun, as some believe, but rather by the tilt of Earth's rotational axis.
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The document discusses the motions of the Earth, including its rotation on an axis which causes day and night and its revolution around the sun which causes seasons. It also describes the moon's revolution around Earth, which causes the lunar cycle from new moon to full moon over approximately 15 days of waxing and waning phases each month. The Earth's rotation and revolution, along with the moon's revolution around Earth, produce the basic patterns of days, seasons, and lunar phases.
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1) The Earth's axis is tilted 23.5 degrees, which causes the hemispheres to receive different amounts of sunlight throughout the year, leading to seasons.
2) In summer, the hemisphere tilted toward the Sun receives more direct sunlight and experiences warmer temperatures, while the opposite hemisphere experiences winter.
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The Earth rotates on its axis, causing day and night. It also revolves around the sun in an elliptical orbit, taking 365.25 days to complete one revolution and causing seasons. The Earth's axis is tilted, resulting in the summer and winter solstices when the sun is farthest north and south, as well as the spring and fall equinoxes when day and night are approximately equal.
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The document discusses the apparent and real motions of the sun, earth, and stars. It explains that the sun appears to move across the sky each day, but it is actually the earth that rotates daily on its axis, causing day and night. The earth also revolves around the sun once per year. The earth's tilted axis and revolution around the sun together cause the seasons by changing the angle at which sunlight strikes different parts of the earth through the year. Shadows appear in different positions depending on the time of day due to changes in the sun's position as earth rotates.
Eclipses
The document summarizes key facts about the moon. It notes that the moon rotates on its own axis, orbits Earth in 27.8 days, and moves with Earth around the sun. It influences ocean tides and stabilizes Earth's axial tilt, regulating our seasons. Dark spots on the moon are craters formed by impacts. The document also defines a lunar eclipse as occurring when Earth is between the sun and moon, darkening the moon.
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The document discusses the Earth's rotation and revolution around the Sun. It explains that the Earth's true solar day, from true noon to true noon, varies throughout the year due to changes in the Earth's orbit and axial tilt. During some periods, the true solar day is up to 30 seconds longer than the average solar day, while during other periods it can be up to 21 seconds shorter. The document also provides a brief overview of the four seasons experienced on Earth as it revolves around the Sun - spring, summer, autumn, and winter.
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This document provides information about Earth's seasons including:
1) The reasons for Earth's seasons are the 23.5 degree tilt of the Earth's axis and its revolution around the sun.
2) Seasons vary depending on latitude because the sun's rays hit Earth's surface at different angles and intensities depending on the hemisphere's position toward or away from the sun.
3) Additional diagrams and facts are presented about the sun's path, latitude lines, solar noon, intensity, angles, the names and dates of the different seasons in both hemispheres.
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The Earth has two types of movements: rotation around its axis, which takes 24 hours and results in the cycle of day and night as different parts of the Earth face the sun, and rotation around the sun in its orbit. The Earth's axis is an imaginary line passing through the north and south poles. When a part of the Earth faces the sun it is daytime, and when a part faces away it is night.
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Please note that there are many gif images, which would work only when downloaded, like in the second slide
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The document discusses the causes of seasons. It explains that seasons are not due to variations in Earth's distance from the sun, as some believe, but are instead caused by the tilt of Earth's 23.5 degree axis. This tilt results in changes in the amount of incoming solar radiation (insolation) and the angle at which the sun's rays strike different locations throughout the year, causing the seasons to change. Specifically, when a hemisphere is tilted toward the sun it experiences summer, and when tilted away it experiences winter.
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The Earth revolves around the sun over the course of 365.25 days. As it orbits the sun, different parts of the Earth experience different seasons due to changes in the amount of direct sunlight. On June 21st in the Southern Hemisphere, it is the winter solstice, meaning they have their longest night and shortest day of the year.
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The Earth has two main motions that affect its seasons: rotation, which causes day and night, and revolution around the Sun. The tilt of the Earth's axis of rotation combined with its revolution cause the seasons by changing which hemisphere receives more direct sunlight throughout the year. The solstices mark the summer and winter beginning in each hemisphere when the Sun is at its maximum northern and southern declinations, while the equinoxes occur when day and night are equal in length as the Sun crosses the celestial equator.
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The document discusses the causes of seasons on Earth. It is caused by the 23.5 degree tilt of the Earth's axis as it revolves around the sun. During part of the year, the northern hemisphere leans more directly towards the sun, experiencing summer, while the southern hemisphere experiences winter. Then half a year later, the situation is reversed. The tilt of the axis causes the sun's rays to strike different parts of the Earth at different angles throughout the year, affecting the distribution of heat and resulting in seasonal temperature changes.
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The document summarizes why Earth experiences seasons. It is due to the 23.5 degree tilt of the Earth's axis as it revolves around the sun. This tilt causes the Northern and Southern Hemispheres to receive different amounts of sunlight throughout the year, creating the seasons. Summer occurs when a hemisphere is tilted toward the sun, receiving more direct sunlight and longer days. Winter happens when a hemisphere is tilted away, receiving less direct sunlight and shorter days. The solstices mark the longest and shortest days, while the equinoxes have equal day and night lengths.
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The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - summer, winter, spring and fall. The seasons are not caused by variations in Earth's distance from the sun, as some believe, but rather by the tilt of Earth's rotational axis.
Motions of the earth
The document discusses the motions of the Earth, including its rotation on an axis which causes day and night and its revolution around the sun which causes seasons. It also describes the moon's revolution around Earth, which causes the lunar cycle from new moon to full moon over approximately 15 days of waxing and waning phases each month. The Earth's rotation and revolution, along with the moon's revolution around Earth, produce the basic patterns of days, seasons, and lunar phases.
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1) The Earth's axis is tilted 23.5 degrees, which causes the hemispheres to receive different amounts of sunlight throughout the year, leading to seasons.
2) In summer, the hemisphere tilted toward the Sun receives more direct sunlight and experiences warmer temperatures, while the opposite hemisphere experiences winter.
3) Common misconceptions are that the Earth's distance from the Sun or elliptical orbit cause seasons, but the Earth is actually closest to the Sun in January and farthest in July with little effect on seasons.
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This document discusses the causes of Earth's seasons. It explains that the seasons are caused by changes in the angle of the Sun's rays due to the tilt of Earth's axis of rotation as it revolves around the Sun. Because of this tilt, different parts of Earth receive more or less direct sunlight throughout the year, causing seasonal temperature variations. The document asks questions to help understand how Earth's rotation, axial tilt, and revolution around the Sun contribute to creating the seasons.
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The document discusses time zones, seasons, and the Earth's relationship to the sun. It explains that as the Earth rotates and revolves around the sun, different parts of the planet receive sunlight at different times, resulting in time zones. It also notes that the Earth is tilted on its axis and takes 365.25 days to orbit the sun, leading to seasons in the Northern and Southern Hemispheres. Key dates and phenomena like equinoxes and solstices are also outlined.
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The Earth rotates on its axis, causing day and night. It also revolves around the sun in an elliptical orbit, taking 365.25 days to complete one revolution and causing seasons. The Earth's axis is tilted, resulting in the summer and winter solstices when the sun is farthest north and south, as well as the spring and fall equinoxes when day and night are approximately equal.
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The document discusses the apparent and real motions of the sun, earth, and stars. It explains that the sun appears to move across the sky each day, but it is actually the earth that rotates daily on its axis, causing day and night. The earth also revolves around the sun once per year. The earth's tilted axis and revolution around the sun together cause the seasons by changing the angle at which sunlight strikes different parts of the earth through the year. Shadows appear in different positions depending on the time of day due to changes in the sun's position as earth rotates.
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The document summarizes key facts about the moon. It notes that the moon rotates on its own axis, orbits Earth in 27.8 days, and moves with Earth around the sun. It influences ocean tides and stabilizes Earth's axial tilt, regulating our seasons. Dark spots on the moon are craters formed by impacts. The document also defines a lunar eclipse as occurring when Earth is between the sun and moon, darkening the moon.
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-Day and Night
-The four seasons
-Solstice and Equinox
-High tide and low tide
-Windspeed and Direction
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The document discusses the Earth's rotation and revolution around the Sun. It explains that the Earth's true solar day, from true noon to true noon, varies throughout the year due to changes in the Earth's orbit and axial tilt. During some periods, the true solar day is up to 30 seconds longer than the average solar day, while during other periods it can be up to 21 seconds shorter. The document also provides a brief overview of the four seasons experienced on Earth as it revolves around the Sun - spring, summer, autumn, and winter.
Rotation and Revolution
The document explains key concepts about the Earth's rotation and revolution:
1) The Earth rotates on its axis once every 24 hours, causing day and night, while it revolves around the Sun once every 365.25 days, causing seasons.
2) The Earth experiences seasons because its axis is tilted, resulting in different parts receiving more direct sunlight over the course of the year.
3) Rotation refers to the Earth spinning on its axis, while revolution describes the Earth traveling around the Sun in its orbit.
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The document discusses the Earth's movements of rotation and revolution that cause day/night cycles and seasons. Rotation occurs over 24 hours and causes day and night as the Earth spins on its axis. Revolution occurs over 365 days as the Earth orbits the sun, resulting in the four seasons of winter, spring, summer and fall.
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Earth is a terrestrial planet that revolves around the sun and rotates on its axis. It has an average distance from the sun of 150 million km and a diameter of 12,756 km. Earth's rotation causes day and night and its revolution around the sun and axial tilt cause seasons. Earth has seasons including summer, winter, autumn and spring due to its tilt. Eclipses occur when the moon or Earth block the sun's light from reaching the other.
Rotation and revolution powerpoint
This presentation discusses the effects of rotation and revolution on Earth. Rotation is the movement of Earth on its axis, causing day and night as well as high and low tides. Revolution is Earth's orbit around the sun, which causes the four seasons due to the tilt of Earth's axis. Revolution also results in varying lengths of days and nights throughout the year and changes in the altitude of the midday sun.
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The Earth-Sun relationship affects climate in the following ways:
1. The Earth's 23.5 degree tilt causes uneven heating and results in seasons as the tilt changes in relation to the Sun throughout the year.
2. The Tropics of Cancer and Capricorn mark the beginning of summer and winter in the Northern Hemisphere when the Sun's rays directly strike them.
3. Areas above 66.5 degrees north and south latitude experience extremes of 24 hours of daylight or darkness depending on the season.
Seasons ppt.pptx
Seasons are divisions of the year marked by distinct weather patterns, changes in temperature, and variations in daylight hours. They are primarily determined by the Earth's axial tilt and its orbit around the Sun. The four main seasons recognized in many regions of the world are spring, summer, autumn (fall), and winter. Here's a brief description of each season:
1. Spring: Spring is the season that follows winter and precedes summer. It is characterized by gradually increasing temperatures, longer daylight hours, and the emergence of new plant growth. In many places, spring is associated with blooming flowers, budding trees, and the return of various animal species.
2. Summer: Summer is the warmest season of the year. It is marked by higher temperatures, extended daylight hours, and generally favorable weather conditions. Summer is often associated with vacations, outdoor activities, and the opportunity to enjoy beaches, swimming, picnics, and various recreational pursuits.
3. Autumn (Fall): Autumn, also known as fall, is the season that follows summer and precedes winter. It is characterized by cooler temperatures, shorter daylight hours, and the shedding of leaves from deciduous trees. Autumn is often associated with vibrant foliage, harvest festivals, and a gradual transition towards colder weather.
4. Winter: Winter is the coldest season of the year. It is marked by low temperatures, shorter daylight hours, and, in many regions, the presence of snow and ice. Winter is often associated with holidays such as Christmas and New Year's, as well as activities like skiing, snowboarding, ice skating, and cozy indoor pursuits.
It's important to note that the timing and characteristics of seasons can vary depending on the geographical location, as well as regional climatic conditions.
Annual Motions - Reasons for Seasons
1) The seasons are caused by the 23.5 degree tilt of the Earth's axis as it orbits the sun, not by the Earth's varying distance from the sun.
2) When the northern hemisphere is tilted toward the sun, it experiences summer, and when tilted away, it experiences winter.
3) The summer and winter solstices and vernal and autumnal equinoxes mark the changing seasons as the Earth revolves around the sun.
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This document discusses the relationships between the Earth, Sun, and Moon, and how they affect day and night, years, and seasons. It explains that the Earth's rotation on its axis causes day and night, with a full rotation taking 24 hours. It also explains that the Earth revolves around the Sun over the course of 365 days, which divides the year into four seasons due to the tilt of the Earth's axis. Finally, it discusses how the Moon revolves around the Earth over 29 days, and how the changing positions of the Sun, Earth, and Moon cause the Moon's phases.
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The document discusses the motions of the Earth - rotation and revolution. It provides the following key details:
1. The Earth rotates on its axis, completing one rotation in 24 hours, which causes day and night. It revolves around the Sun, taking 365.25 days to complete one revolution.
2. The Earth's axis is inclined at an angle of approximately 23.5 degrees relative to the orbital plane. This inclination causes the seasons.
3. A leap year has 366 days to account for the extra time in the Earth's revolution around the Sun.
rotation and revolution ppt by Pratham Vats
- The Earth rotates on its axis, causing day and night. It also revolves around the Sun in an elliptical orbit, completing one revolution in 365.256 days.
- The Earth's axis is tilted at an angle of 23.5 degrees relative to the plane of its orbit. This causes the seasons as different parts of the Earth receive more or less direct sunlight throughout the year.
- Solstices occur twice yearly when the Earth's tilt is most inclined towards or away from the Sun, resulting in the longest and shortest days of the year for the Northern and Southern Hemispheres respectively. Equinoxes occur when day and night are approximately equal in length.
Seasons.ppt
The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - summer, winter, spring and fall. The seasons are not caused by variations in Earth's distance from the sun, as some believe, but rather by the tilt of Earth's rotational axis.
Seasons.ppt
The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - summer, winter, spring and fall. The seasons are not caused by variations in Earth's distance from the sun, as Earth is actually closest in January and farthest in July.
Seasons.ppt
The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - winter, spring, summer and fall. Key dates like the solstices and equinoxes mark the transitions between seasons in each hemisphere.
Seasons.ppt
The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - summer, winter, spring and fall. The seasons are not caused by variations in Earth's distance from the sun, as some believe, but rather by the tilt of Earth's rotational axis.
Seasons.ppt
The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and this tilt is what causes the seasons as Earth revolves around the sun. As Earth revolves, different hemispheres receive more or less direct sunlight throughout the year, resulting in variations in temperature and daylight hours that define the seasons - summer, winter, spring and fall. The seasons are not caused by variations in Earth's distance from the sun, as some believe, but rather by the tilt of Earth's rotational axis.
Chapter 3 rotation and revolution
The document discusses the rotation and revolution of the Earth. It explains that rotation is the spinning of the Earth on its axis, which causes day and night, while revolution is the movement of the Earth around the Sun, taking one year to complete. It also describes how the tilt of the Earth's axis and its revolution cause the four seasons in the northern and southern hemispheres.
The motion of Earth
1) The Earth rotates on its axis daily, causing the apparent motion of the sun, moon, and stars across the sky from east to west.
2) The Earth also revolves around the sun yearly, leading to seasons and variations in the sun's path.
3) Additionally, the Earth's axis undergoes a slow wobble called precession and a nodding motion called nutation, along with variations in its rotation.
Seasons.ppt
The document discusses the causes of seasons on Earth. It explains that Earth's axis is tilted at an angle of 23.5 degrees, and as Earth revolves around the sun, this tilt causes different parts of Earth to receive more or less direct sunlight over the course of a year, resulting in seasons. Specifically, summer occurs when the hemisphere is tilted toward the sun, receiving more direct rays, and winter occurs when tilted away. The solstices mark the beginning of summer and winter, while the equinoxes occur when day and night are approximately equal lengths.
Unit 3_ Earth and Space.pdf
1) The document discusses topics related to Earth's rotation, revolution, seasons, lunar phases, and eclipses. It explains that Earth's tilted axis and yearly revolution around the sun cause the seasons as different hemispheres face the sun.
2) As the moon revolves around Earth over 28 days, we see different lunar phases that change as the moon's illuminated portion waxes and wanes.
3) Eclipses occur when the sun, moon, and Earth align, either blocking the sun (solar eclipse) or casting Earth's shadow on the moon (lunar eclipse).
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Day and night
- 3. DAY AND NIGHT… What does it have to do with planet earth?
- 4. DAY AND NIGHT… It is a phenomenon that occurs in accordance to the motion of the EARTH and its relation to the SUN and MOON.
- 5. Similar to this video clip…
- 6. But the reality is….
- 7. DAY AND NIGHT… But what is this motion we speak of? It is the rotational movement of the earth , sun and moon on its own axis as well as how the Earth revolve around the sun while the moon also revolves around it.
- 8. All of these celestial bodies follow a common direction, travelling counter-clockwise. The sun rotates 27 earth days, and 225 million earth years around the galaxy. The Earth rotates onits axis for about 23 hours and 56 minutes and makes a complete revolution for 365.3 days Whereas the moon both rotates and revolves for about 28 days, making it possible for the same portion of its surface to face the Earth all througout the year.
- 9. Another factor that affects the day and night phenomenon is the eccentricity and tilting of the Earth’s axis. Next
- 10. ECCENTRICITY The deviation of the path of an orbiting body from a true circle TILT (Obliquity) A form of inclination due to gravitational pull of the sun and other planets. bac k
- 11. Because of this eccentricity and tilting, it causes different lengths of day and night in different parts of the world.
- 13. Countries part of the Arctic Circle United States (Alaska) Canada Greenland Norway Sweden Finland Russia
- 14. Countries part of the Tropic of Cancer, Equator and Tropic of Capricorn
- 15. Countries part of the Arctic Circle
- 17. In order to better understand this discrepancies, we must first tackle about the equinox and solstice.
- 19. Equinox literally means "equal night". On the vernal (spring) and autumnal (fall) equinoxes, day and night are nearly the same length (the date on which day and night are actually closest to the same length is called the equilux, and occurs a few days towards the winter "side" of each equinox). Neither hemisphere gets more sunlight than the other, so both have similar seasons (fall in one hemisphere and spring in the other). EQUINOX nex t
- 20. It came from the Latin word “solstitium” meaning Sun and “sistere” means stand still The summer solstice, which happens on June 21 or 22 each year, has the longest daylight time. It's also the first day of summer. The winter solstice, on December 21 or 22, has the shortest daylight time, and officially kicks off winter. Solstice
- 21. TIME • Greenwich Meridian Time (GMT) refers to the mean solar time at the Royal Observatory in Greenwich, London, which became adopted as a global time standard. • The International Date Line (IDL) is an imaginary line on the surface of the Earth that runs from the north to the south pole and demarcates the change of one calendar day to the next. It passes through the middle of the Pacific Ocean, roughly following the 180° longitude but deviating to pass around some territories
- 22. TIME
- 23. THANK YOU FOR LISTENING!! Made by: Elaine B. Espejon