KSA Science

What is an example of a force?

• Push

• Gravity

• Friction

• Speed

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What is Newton's First Law of Motion?

• An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

• An object will accelerate in the direction of the net force acting on it.

• For every action, there is an equal and opposite reaction.

• An object in motion will eventually come to a stop without external forces.

What is friction?

• A contact force that opposes the motion of an object.

• A force that accelerates an object in motion.

• A type of energy that is lost during movement.

• A force that increases the speed of an object.

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What is the difference between renewable and non-renewable energy sources?

• Renewable energy can be replenished naturally (like solar or wind), while non-renewable energy cannot (like fossil fuels).

• Non-renewable energy sources are always more efficient than renewable sources.

• Renewable energy sources are more expensive to harness than non-renewable sources.

• Non-renewable energy sources can be replenished naturally over time.

What is the formula for calculating speed?

• Speed = Distance / Time

• Speed = Time / Distance

• Speed = Distance + Time

• Speed = Distance - Time

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What is a simple machine?

• A device that makes work easier by allowing us to push or pull over increased distances.

• A tool used for measuring distances accurately.

• A complex mechanism that requires multiple parts to function.

• A type of machine that operates without any human intervention.

Which object would have the most friction?

• Sandpaper, as it has a rough surface that creates more resistance.

• Ice, as it has a smooth surface that reduces resistance.

• Rubber, as it has a soft surface that creates less resistance.

• Glass, as it has a slick surface that minimizes resistance.

What is the law of conservation of energy?

• Energy can be created and destroyed.

• Energy can only be created, not destroyed.

• Energy cannot be created or destroyed, only transformed from one form to another.

• Energy is a finite resource that can be depleted.

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What is kinetic energy?

• Energy of an object at rest, calculated as 1/2 mv² (where m is mass and v is velocity).

• Energy of an object in motion, calculated as 1/2 mv² (where m is mass and v is velocity).

• Energy stored in an object due to its position or state.

• Energy that is released during a chemical reaction.

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What is Gravity?

• A force that repels objects away from the Earth.

• A force that attracts objects towards the center of the Earth, keeping us grounded.

• A type of energy that allows objects to float in space.

• A phenomenon that causes objects to move in a circular path.

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NGSS.MS-PS2-4

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