5th - Science - Unit 8 Lesson 2 Flashcards Preview

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Flashcards in 5th - Science - Unit 8 Lesson 2 Deck (20)
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0
Q

The strength of gravity increases as the ___________ of objects increases and decreases as the distance between objects increases.

A

Total mass

1
Q

Is a force of attraction, or pull, between any two objects?

A

Gravity

2
Q

The Sun’s gravitational pull on Earth is ___________ than its pull on a planet much farther away, such as Neptune.

A

Stronger

3
Q

Is the path that one object takes around another object?

A

Orbit

4
Q

What does the Earth and the other planets move in orbits around?

A

The Sun

5
Q

What is it called when moving objects have a tendency to keep moving in a straight line?

A

Inertia

6
Q

Because of the effects of gravity and inertia, the Earth moves in what nearly circular orbit shape?

A

Ellipse

7
Q

A complete spin on its axil?

A

Rotation

8
Q

At any time, half of Earth faces the Sun and has _____________, while the other half faces away and has ________________.

A

Daylight, darkness

9
Q

What is it called when every year, Earth makes one complete trip around the Sun?

A

Revolution

10
Q

As Earth revolves around the Sun, sunlight strikes different parts of the Earth at different what?

A

Angles

11
Q

Why does sunlight strikes Earth differently at different times of the year?

A

Because the Earth’s axis is tilted about 23 degrees.

12
Q

What does the changes in the angle of sunlight on the Earth’s surface cause?

A

The seasons

13
Q

What season is it when the Northern Hemisphere is tilted away from the Sun?

A

It is winter in the Northern Hemisphere.

14
Q

Due to the Earth’s rotation, the constellations appear to change what from season to season?

A

Position

15
Q

Certain constellations, such as Orion, are only visible during which season in the Northern Hemisphere?

A

Orion is only visible in winter in the Northern Hemisphere.

16
Q

Why do the Sun, stars, and Moon appear to move from east to west across the sky?

A

Because of the Earth’s rotation

17
Q

Is the Sun a star?

A

Yes, a star is an object that produces thermal and light energy. The Sun is an average-sized star Nd the largest object in the solar system.

18
Q

What causes seasons?

A

The changes in the angle of the sunlight on the Earth cause the seasons.

19
Q

What keeps Earth in orbit around the Sun?

A

Xxxxxxx

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