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?

17
Q

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

18
Q

Is summer direct or indirect sunlight?

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?

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?

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?

25
Is the moon rotating on its own axis?
Yes
26
Does the moon produce its own light?
No
27
How does the moon get its light?
The suns light is reflecting off it, towards earth
28
Why do we see different amounts of the moon each day?
Due to the moon orbiting the Earth
29
How many phases of the moon are there?
8
30
What are the phases of the moon called? ( in order )
new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent.
31
What does crescent moon mean?
Less than half lit
32
What does Gibbous moon mean?
More than half lit
33
How does a solar eclipse happen?
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
What are the 2 types of solar eclipse?
Total & partial
35
When is a total eclipse seen?
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
When is a partial eclipse seen?
It is seen at a location when that location enters a partial shadow called a penumbra
37
Why does a lunar eclipse occur?
A lunar eclipse happens when the Earth passes between the Sun and the moon