Moon, Earth, Sun Unit Flashcards

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1
Q

What do people call a group of stars?

A

constellation

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2
Q

What is earth’s annual motion around the sun?

A

revolution

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3
Q

how many days does it take for the Earth to go around the sun?

A

365

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4
Q

How long does it take Earth to rotate once?

A

24 hours or 1 day

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5
Q

The moon is what fraction of the Earth?

A

1/4

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6
Q

The calendar we used is based on what?

A

The seasons or how long it takes Earth to go around sun once

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7
Q

The tendency of an object to resist a change in motion is…

A

inertia

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8
Q

The tilting of the Earth causes what?

A

seasons

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9
Q

The force of gravity between 2 objects depends on what 2 things?

A

mass and distance

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10
Q

What 2 things keep the Earth in orbit around the sun and the moon in orbit around the Earth?

A

gravity and inertia

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11
Q

What causes the changes in the appearance of the moon?

A

The position of the Earth, sun and moon

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12
Q

What order are the Earth, sun and moon during a lunar eclipse?

A

sun, Earth, moon

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13
Q

What order are the Earth, sun and moon during a solar eclipse?

A

Sun, moon, Earth

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14
Q

The sun is how many times bigger than the Earth?

A

1000

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15
Q

The sun is how many times bigger than the moon?

A

4000

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16
Q

What causes tides to happen?

A

Gravity or gravitational pull from the moon

17
Q

What caused the moon’s craters?

A

meteoroids

18
Q

A streak of light produced when a small object burns up

A

meteor

19
Q

A giant ball of hot gas made of hydrogen and helium

A

star

20
Q

The amount of matter in an object

A

mass

21
Q

the rise and fall of the ocean

A

tide

22
Q

an object that orbits the sun and has been rounded by gravity

A

planets

23
Q

a line passing through the Earth’s center and poles

A

axis

24
Q

movement of Earth around it’s axis

A

rotation

25
Q

the path of Earth as it revolves around the sun

A

orbit

26
Q

a body that orbits a planet

A

satellite

27
Q

a push or a pull

A

force

28
Q

an object at rest stays at rest and an object in motion stays in motion unless acted upon by a force

A

Newton’s 1st law of motion

29
Q

the different shapes of the moon are called…

A

phases

30
Q

a large, round pit caused by a meteoroid

A

crater