1. Astronomy is the science that studies the universe outside of our planet. It deals with heavenly bodies. 2. Some examples of astronomical phenomena that can be observed without a telescope include the diurnal motion of stars, the annual motion of Earth orbiting the sun, precession of the equinoxes, and the changing phases of the moon as it revolves around Earth. 3. The moon appears to change shape throughout the month in a cycle called phases, from new moon when it is not illuminated to full moon when the entire side facing Earth is lit by the sun.

1. PHYSICAL SCIENCE
Grade 11

2. Examples of
Astronomical
Phenomena Before
the Advent of
Telescope

3. Objectives
:
1.Explain what is Astronomy;
2.Enumerate the examples of
astronomical phenomena;
3.Describe the phases of the
moon;
4.Differentiate lunar and solar
eclipse.

5. 1. It refers to the science of the
universe outside of our planet.
a. Astronomy
b. Astrology
c. Geography
d. Geology

6. 1. It refers to the science of the
universe outside of our planet.
a. Astronomy
b. Astrology
c. Geography
d. Geology

7. 2. A Lunar eclipse can only
occur when the moon is full.
a. True
b. False

8. 2. A Lunar eclipse can only
occur when the moon is full.
a. True
b. False

9. 3. The different appearance of
the moon throughout the month
are known as the moon’s _____.
a. eclipses c. waxing
b. waning d. phases

10. 3. The different appearance of
the moon throughout the month
are known as the moon’s _____.
a. eclipses c. waxing
b. waning d. phases

11. 4. When the moon comes between the
Sun and the Earth, a shadow is cast
on the Earth. This phenomenon is
called ________.
a. waxing moon c. solar eclipse
b. waning moon d. lunar eclipse

12. 4. When the moon comes between the
Sun and the Earth, a shadow is cast
on the Earth. This phenomenon is
called ________.
a. waxing moon c. solar eclipse
b. waning moon d. lunar eclipse

13. 5. When portion of the moon that is
by sunlight is getting larger, the
moon is said to be ______.
a. waxing c. in eclipse
b. waning d. in phase

14. 5. When portion of the moon that is
by sunlight is getting larger, the
moon is said to be ______.
a. waxing c. in eclipse
b. waning d. in phase

15. Astronomy

16. Astronomy is the science
of the universe outside of
our planet.

17. This is the branch of
physical science
dealing with heavenly
bodies.

18. Examples of
Astronomical
Phenomena

19. 1. Diurnal Motion
- is the apparent movement of
stars and other celestial bodies
around Earth as direct effect of
the Earth’s rotation on its axis.

21. 2. Annual Motion
- is the motion of the Earth and
its orbit around the sun, it takes
one year for the Earth to make one
complete orbit.

22. 3. Precession of the Equinoxes
- is the apparent motion of
the equinoxes along the ecliptic
as Earth “wobbles”.

23. 4. Moon Phases
- Is the changing appearance
of the moon as it makes a
complete revolution around the
Earth.

24. Points to Remember:
New Moon-occurs when the sunlit
portion of the moon is facing away
from the Earth.