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- 1. Multiple Choice
What is the force that is keeping us on Earth?
Centrifugal force
Gravity
Rarity
There isn't one.
- 2. Multiple Choice
Why do you see the tip of a sailboat's mast first when looking out at the horizon if it is coming towards you?
You don't.
You see the top because of the curvature of the Earth.
You see the top because the Earth is flat.
- 3. Multiple Choice
Why do you see more from up high in a tower than when standing on the ground?
Standing up high allows you to see over the curve of the Earth more.
You see the same exact thing whether or not you are up high or down low.
It takes more work to climb the tower.
- 4. Multiple Choice
To where is the force that is keeping us on Earth pulling us?
To the ground.
To the center of the Earth.
To sea level.
- 5. Multiple Choice
How has science and engineering helped us deal with the effects of the force that keeps us on Earth?
Cranes help us lift heavy objects.
Wings and jet engines prevent planes from falling out of the sky.
Safety harnesses and ropes keep people from falling off cliffs, roofs and buildings.
All of the above.
- 6. Multiple Choice
The force that keeps us on Earth affects _______________.
Only matter on the Earth's surface.
All matter on Earth.
All matter except on the North and South Poles.
Only people.
- 7. Multiple Choice
Why do all people on Earth feel as if the Earth is beneath them, regardless of where they are?
They feel this way because there is a force pulling everything to the center of the Earth.
The Earth is flat, so they all have the ground below them.
The wind pushes them down.
- 8. Multiple Choice
What is the best definition of "down?"
The direction towards one feet.
The direction towards the center of the Earth.
The direction facing downhill.
- 9. Multiple Choice
The most accurate way to describe an upward direction is to say that "up" is _____________.
The direction toward the sun.
The direction away from Earth's center.
The direction towards your fingers if you hold your arms above your head.
- 10. Multiple Choice
Hemisphere means...
The Earth.
Half of the Earth.
Quarter of the Earth.
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