Unit 4 Finals Review 1

The scope of the Final includes Unit 4 (Gravitation), Unit 5 (Thermodynamics), and Unit 6 (Gas Laws).

• Ok.

• Sure.

• Understood.

• Roger.

Most questions will be Multiple Choice Questions.

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• Sounds good.

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• Great.

Your Final Assessment will require you to read each question very carefully.

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• Roger that.

• Will do.

• Got it.

Why does the Earth move in a circle around the sun?

• Because of the Earth's high velocity.

• Because of the Sun's powerful gravity.

• Because the Earth is accelerating towards the Sun.

• All of these are true.

If the sun exerts a force due to gravity on Earth, then...

• the Earth exerts a smaller force on the sun.

• the Earth exerts a larger force on the sun.

• the Earth exerts an equal force on the sun.

Gravitational force is proportional to...

• distance

• 1 / distance

• 1 / distance²

• distance²

If the distance between two objects doubles...

• the gravitational force doubles.

• the gravitational force halves.

• the gravitational force quarters.

• the gravitational force triples.

If the mass of one object triples...

• the gravitational force doubles.

• the gravitational force halves.

• the gravitational force quarters.

• the gravitational force triples.

Why does the Earth have an atmosphere made of gasses that surround the Earth?

• There is a boundary that seals the gasses so that they cannot escape.

• Some of the lightest and fastest gas particles can escape, but most are held by the Earth's gravity.

• The Earth's gravity is so strong that nothing can escape.

• The Earth is flat. The atmosphere, sun, moon, stars and everything else above us is contained within a giant firmament.

Let "x" be the gravitational force between two objects. If you double the distance between the objects, what is the new force?

• 2x

• 4x

• x/2

• x/4

• x