Phases, Eclipses and Tides Flashcards Preview

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Flashcards in Phases, Eclipses and Tides Deck (30):
1

Why does the moon have phases?

because it goes around the earth and they are caused by the changes of the positions of the Earth, Moon and Sun.

2

True or False. The same side of the moon always faces the Earth.

True

3

True or False. A day and a year on the moon are the same length.

True

4

What causes the phases of the moon, eclipses and tides?

Moon goes around the earth and depending where the sun is the phase of the moon changes.
Tides are caused by the differences in how much the moons gravity pulls on different parts of the Earth.
Eclipse is when the moon's shadow hits the Earth.

5

phases

the different shapes of the moon you see from Earth.

6

How often does the moon go through an entire set of phases?

29 1/2 days

7

What does the phase of the moon you see depend on?

It depends on the sunlit side of the moon that faces the earth.

8

What do you see in the New Moon, First quarter, full moon, and third quarter of the moon?

New Moon=the side of the moon facing earth is dark.
1st quarter= you can see half of the sunlit side of moon
Full Moon= you can see the entire sunlit side of moon
3rd quarter= you can see half of the moon sunlit side.

9

Is the near side (facing earth) always the dark side?

No because the moon moves around the earth so it depends.

10

What percentage of the dark side of the moon do you see during the 1st and 3rd quarters?

50%

11

When the moon's shadow hits earth or Earth's shadow hits the moon, what occurs?

an Eclipse.

12

What are 2 types of eclipses?

Solar eclipse and Lunar eclipse.

13

The darkest part of the moon's shadow is called ?

the Umbra

14

what causes a solar eclipse?

The moon passes between the earth and the sun and blocks the sunlight from Earth.

15

What is the larger part of a shadow, less dark than the umbra called?

Penumbra

16

True or False. During a partial solar eclipse, part of the sun remains visible.

True

17

True or False. During a total Solar eclipse the sky grows dark.

True

18

What is the arrangement of earth , the moon, and the sun during a Lunar Eclipse?

the Earth is in the middle of the sun and Moon.

19

True or False. A partial lunar eclipse occurs when the moon passes partly into the umbra of Earth's shadow.

True.

20

Tides

rise and fall of ocean water

21

What force pulls the moon and Earth toward each other?

gravity

22

why do tides occur?

They occur because of the force and gravity between earth and moon.

23

What are is a spring tide?

They are the GREATEST difference between consecutive low and high tides.

24

What is a neap tide?

a tide with the LEAST difference between consecutive low and high tides.

25

What is the position of the moon in Spring tide?

straight line from the sun(New moon/Full Moon phase)

26

What is the position of the moon in Neap tide?

Right angle from the sun (1st quarter/3rd Quarter phase)

27

Lunar eclipse

occurs at a full moon when earth is directly between the moon and sun.

28

Solar Eclipse

occurs when the moon passes between the earth and sun.

29

A person standing in the moon's...................would see a partial solar eclipse.

penumbra

30

A person standing in the moon's.....................would see a total solar eclipse.

umbra