Earth & Space Flashcards

1
Q

When does gravity occur?

A

When 2 masses are placed near each other, they will be attracted to each other by gravity

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2
Q

If the masses are small is the gravity big or small?

A

Small= small

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3
Q

What is gravity affected by?

A

Distance

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4
Q

What does Force of attraction mean?

A

Gravity

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5
Q

When is gravity strongest?

A

If an object had a huge mass in a small volume ( very dense )

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6
Q

How can the gravity on the surface of a celestial body be calculated?

A

Using information on the bodies mass and radius

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7
Q

What is mass?

A

Mass is how much matter an object contains

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8
Q

What is weight?

A

Weight is the force exerted on mass by gravity

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9
Q

Is mass constant regardless of location?

A

Yes

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10
Q

Is weight constant regardless of location?

A

No, it changes depending on the gravity of the area

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11
Q

Give a unit of measurement for mass

A

Kilogram

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12
Q

Give a unit of measurement for weight:

A

N- Newton

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13
Q

Do the planets orbit the sun in a perfect circle?

A

No

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14
Q

What is the shape that planets orbit the sun in?

A

Ellipse shape

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15
Q

When the Earth turns on its axis what do we call this?

A

Days

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16
Q

At any given time, how much of the Earth is facing the sun?

A

Half

17
Q

When the earth ( Europes half) is facing away from the sun, what do we call this?

A

Nighttime

18
Q

Is summer direct or indirect sunlight?

A

Direct

19
Q

List 3 things that occur during winter that doesn’t during summer

A

Cooler temperatures
Shorter days
Longer nights

20
Q

Is winter direct or indirect sunlight?

A

Indirect

21
Q

If there is more sunlight hitting an area on earth, will the area be colder or hotter than another area that doesn’t have as much light?

A

Hotter

22
Q

Why do seasons occur?

A

Seasons occur because the earth is tilted on its axis as it rotates, orbiting the sun

23
Q

What is the moon called scientifically because it orbits the earth?

A

Satellite of the Earth

24
Q

How long does it take for the moon to orbit the Earth?

A

27.3 days

25
Q

Is the moon rotating on its own axis?

A

Yes

26
Q

Does the moon produce its own light?

A

No

27
Q

How does the moon get its light?

A

The suns light is reflecting off it, towards earth

28
Q

Why do we see different amounts of the moon each day?

A

Due to the moon orbiting the Earth

29
Q

How many phases of the moon are there?

A

8

30
Q

What are the phases of the moon called? ( in order )

A

new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent.

31
Q

What does crescent moon mean?

A

Less than half lit

32
Q

What does Gibbous moon mean?

A

More than half lit

33
Q

How does a solar eclipse happen?

A

A solar eclipse happens when a new moon moves between the Earth and Sun blocking, some or all of the Suns rays from reaching the Earth

34
Q

What are the 2 types of solar eclipse?

A

Total & partial

35
Q

When is a total eclipse seen?

A

A total eclipse is seen at a location on Earth when that location enters a shadow in which no light shines, called an umbra

36
Q

When is a partial eclipse seen?

A

It is seen at a location when that location enters a partial shadow called a penumbra

37
Q

Why does a lunar eclipse occur?

A

A lunar eclipse happens when the Earth passes between the Sun and the moon