21. The Universe
All the matter and
space that exists
Galaxy
Stars
Enormous cloud of
stars and celestial
bodies
A celestial body
with the spherical
shape that is
made of gases
Example: The
Milky Way Galaxy
Classified
according to its
color and shape
Example: the Sun
Planets
Large spherical
bodies that
revolve around a
star
Satellites
Small celestial
bodies that
revolve around
planets
Asteroids
Bodies of rock
Comets
Bodies of rock and
ice
Meteorites
Also called
shooting stars
Small pieces of
rocks from
asteroids and
comets
22. Copy and answer in your
notebook.
1.
2.
3.
4.
5.
Galaxies are enormous
________________ of stars, gases and
cosmic dust.
The Milky Way galaxy has a
________________ shape.
The Sun is a ________________ star.
________________ are bodies of rock
and ice.
________________ are large sphercial
bodies that revolve around a star.
23. 2) Our solar system
part of the Milky Way (Via Lactea) Galaxy.
includes the Sun and all the celestial bodies that
revolve around it, such as:
• Planets
• Natural
satellites
• Asteroids
• Comets
• Meteorite
s
25. 3) How does the Earth move?
Rotation:
The Earth rotates on an imaginary axis.
It takes 24 hours.
26. 3) How does the Earth move?
Revolution:
The Earth revolves around the Sun in an
elliptical orbit.
It takes one year (365 days, 6 hours
and 9 minutes).
27. The Milky Way
Galaxy
Sun
Planets
Other celestial
bodies
Inner Planets
Mercury
Venus
Outer Planets
Mars
Earth
Rotates
Takes 24
hours
Jupiter
Revolves
Takes 365 ¼
days
Saturn
Uranus
Neptune
28. Copy and answer in your
notebook.
1.
2.
3.
4.
The four planets closest to the sun are
________________,
________________, ________________
and ________________.
These planets are called
________________.
The Earth completes one
________________ every 24 hours.
The Earth takes one ________________
to go around the Sun.
29. 4) The Layers of the Earth
1.
Atmosphere
2.
Hydrosphere
3.
Contains various gases
Surrounds the whole planet
All the water that exists in the Earth
Geosphere
Solid part of the Earth
Has different layers
30. Layers of the Geosphere
Crust
Outer
layer of the geosphere made of rocks
Includes the Earth´s continents, islands and
ocean floors
Mantle
Layer
of rock under the crust, very hot
Core
Inner
layer of the geosphere
Made of iron
32. Copy and answer in your
notebook.
1.
2.
3.
Name the layers of the Earth´s
atmosphere.
Draw and label the layers of the
geosphere.
On which part of the geosphere do
people live?
33. 5) The Moon
1.
2.
moves in two ways:
It rotates on an imaginary axis. It takes
28 days.
It revolves around the Earth. It takes 28
days.
During this time, we see different lunar
phases:
42. Answer in your notebook.
Match the pictures with the Moon´s
phases.
Answer the following questions.
1.
2.
What eclipse happens during the full moon?
What eclipse happens when the moon is
between the Sun and the Earth?
