Motion and forces
Night and day
Years
Seasons
Random
100
State Newton's First Law of Motion.
An object at rest will stay at rest, and an object in motion will stay in motion, unless a force causes it to stop or go.
100
Does the earth revolve around its axis or rotate around its axis?
Rotate
100
Does the earth revolve around the sun or rotate around the sun?
revolve
100
Is the axis of the earth tilted, or is it straight up and down?
Tilted
100
What is an "axis"?
An imaginary line around which a planet rotates
200
State Newton's Second Law of Motion.
The heavier an object is, the more force is needed to speed it up or slow it down.
200
When it is day on one side of the earth, is it day or night on the other side?
Night
200
Complete the sentence: a "year" is the time required for...
... a planet to revolve once around the sun
200
Why do we have seasons?
Because the earth's axis is tilted; this causes the sun's rays to heat the planet unevenly
200
What is a force?
A push, pull, or twist
300
State Newton's Third Law of Motion.
For every action, there is an equal and opposite reaction.
300
A day on earth is 24 hours. Why is this?
Because it takes 24 hours for the earth to make one full rotation around its axis
300
Why is a year longer on Neptune than it is on Earth?
Because Neptune has to travel farther to get all the way around the sun. (In fact, Neptune must travel over 17 billion miles)
300
When it is summer in the northern hemisphere, what season is it in the southern hemisphere?
Winter
300
What is inertia?
An object's tendency to keep doing what it is doing
400
A car is going 100 mph when suddenly it crashes into a wall. The driver, who is not wearing his seatbelt, lurches forward and his body hits the steering wheel. This is an example of which law of motion?
Newton's first law of motion: An object in motion will stay in motion, and an object at rest will stay at rest, unless something causes it to stop or go
400
Complete the sentence: a "day" is the time required for...
...a planet to rotate once around its axis
400
Is a year on Mercury longer or shorter than a year on earth? Explain your answer.
Shorter, because it does not have to travel as far to get around the sun (because it is closer to the sun)
400
When the northern hemisphere is tilted away from the sun, what season is it?
Winter
400
You throw a basketball at the floor and it bounces back towards you. This is an example of which law of motion?
Newton's third law of motion: for every action there is an equal and opposite reaction.
500
A man wants to move a very heavy rock, so he has to push very hard. This is an example of which law of motion?
Newton's second law of motion: The more an object weighs, the more force is required to move it.
500
When it is day on one side of the earth, it is night on the other side. Why is this?
Because the sun can only shine on one half of the earth at once
500
If a planet is very far from the sun, will its year be longer or shorter than that of Earth?
Longer
500
Why is it always very hot near the equator?
Because the sun's rays are very intense and direct there
500
Why does the moon shine?
It reflects light from the sun
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