What is the primary difference between mass and weight?

• Mass is the amount of matter in an object, while weight is the force of gravity on that object.

• Mass changes with location, while weight remains constant.

• Mass is a vector quantity, while weight is a scalar quantity.

• Mass is measured in newtons, while weight is measured in kilograms.

Why do astronauts feel weightless in the International Space Station (ISS)?

• Because the ISS is moving at a constant speed.

• Because there is no gravity in space.

• Because gravity has no effect on them in the ISS.

• Because they are in a free-fall state around the Earth.

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NGSS.MS-PS2-2

According to Newton's Second Law, what happens when the same force is applied to objects of different masses?

• The object with more mass will accelerate more.

• They will accelerate at the same rate.

• The object with less mass will accelerate more.

• They will not accelerate at all.

In the experiment with the wooden and brass balls, what was observed?

• Both balls moved at the same speed.

• The wooden ball moved faster than the brass ball.

• Neither ball moved.

• The brass ball moved faster than the wooden ball.

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What is the relationship between mass and velocity when the same force is applied?

• More mass means more velocity.

• More mass means less velocity.

• Mass does not affect velocity.

• Velocity is independent of mass.

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NGSS.MS-PS2-2

Why do objects with different masses fall at the same rate in a vacuum?

• Because they have the same weight in a vacuum.

• Because they have the same mass in a vacuum.

• Because gravity does not act in a vacuum.

• Because there is no air resistance.

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What causes the flat page to land after the crumpled page when dropped from the same height?

• The flat page has more mass.

• The crumpled page experiences more air resistance.

• The crumpled page has more mass.

• The flat page experiences more air resistance.

What is friction?

• A force that acts only in a vacuum.

• A type of gravitational force.

• A force that speeds up objects.

• A resistance between surfaces as objects move against each other.

Why do we skate faster on ice compared to a rough surface?

• Because ice is smoother.

• Because ice has less friction.

• Because ice has more friction.

• Because ice is colder.

What unique feature of gravity causes objects with different masses to fall at the same rate?

• Gravity pulls more on objects with less mass.

• Gravity does not affect objects with different masses.

• Gravity pulls equally on all objects regardless of mass.

• Gravity pulls more on objects with more mass, but they need more force to accelerate.

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NGSS.HS-PS2-4