Physical Science Review

Front

What is Newton's First Law of Motion?

Back

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

Front

What happens to the mass of a substance when water evaporates from it?

Back

The mass decreases by the amount of water that evaporates.

Front

What is air resistance?

Back

Air resistance is a force that opposes the motion of an object through the air, slowing it down.

Front

Why do cars need to drive slower in the rain?

Back

The friction between tires and the road is decreased, making it harder to stop and control the vehicle.

Front

How can reducing friction affect the speed of a car?

Back

Reducing friction allows the car to move faster because there is less resistance against its motion.

Front

What is the effect of gravity on falling objects?

Back

Gravity pulls objects towards the Earth, causing them to accelerate downwards.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass.

Front

What is the role of friction in motion?

Back

Friction opposes motion, slowing down or stopping moving objects.

Front

How does a parachute work?

Back

A parachute increases air resistance, slowing down the descent of an object.

Front

What is the principle of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction; it remains constant.