NC Check-ins Physical Science

What is the role of friction?

• Friction is a force that opposes motion between two surfaces in contact.

• Friction is a force that enhances motion between two surfaces in contact.

• Friction is a type of energy that increases speed.

• Friction is a force that has no effect on motion.

What is radiation in terms of heat transfer?

• The transfer of heat through conduction.

• The transfer of heat through convection.

• The transfer of heat through electromagnetic waves.

• The transfer of heat through physical contact.

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What is the definition of force?

• A push or pull on an object.

• A type of energy that causes motion.

• The mass of an object multiplied by its acceleration.

• A measure of the distance between two objects.

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What is an example of conduction?

• Touching a hot stove and feeling the heat.

• Boiling water in a pot on the stove.

• Feeling the warmth of the sun on your skin.

• Using a microwave to heat food.

What is an example of a physical change?

• Burning wood.

• Melting ice.

• Rusting iron.

• Cooking an egg.

What is heat transfer?

• The movement of thermal energy from one object to another.

• The process of cooling an object down.

• The transfer of kinetic energy between two moving objects.

• The conversion of thermal energy into mechanical energy.

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What is gravity?

• A force that pulls objects toward each other, like the Earth pulling us down.

• A type of energy that causes objects to move faster.

• A phenomenon that only affects large celestial bodies.

• An invisible barrier that prevents objects from falling.

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What is air resistance?

• Friction in the air that slows things down.

• A force that increases speed in the air.

• The weight of an object in the air.

• A type of energy produced by moving air.

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Which is harder to stop - an 18 wheeler or a motorcycle?

• A motorcycle.

• An 18 wheeler.

• A bicycle.

• A sports car.

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What is the difference between a physical change and a chemical change?

• A physical change creates new substances, while a chemical change does not.

• A physical change involves a change in state, while a chemical change does not.

• A physical change does not create new substances, while a chemical change does.

• A physical change is reversible, while a chemical change is always irreversible.

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