Science Exam Review - 2nd 9 Weeks

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often indicated by signs such as bubbling, color change, or temperature change.

Front

What are the signs of a chemical change?

Back

The signs of a chemical change include bubbling, precipitate formation, color change, and temperature change.

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its motion, such as speeding up, slowing down, or changing direction.

Front

What is a balanced force?

Back

A balanced force occurs when two forces acting on an object are equal in size and opposite in direction, resulting in no change in motion.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object has due to its motion. The faster an object moves, the more kinetic energy it has.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a sled at the top of a hill has potential energy.

Front

How does friction affect motion?

Back

Friction is a force that opposes motion. More friction decreases speed, while less friction allows for faster movement.

Front

What surface allows a toy car to travel the furthest?

Back

A toy car will travel furthest on a smooth surface like ice, as it experiences less friction compared to rough surfaces like carpet.

Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other, such as the force that pulls us toward the Earth.

Front

What is the difference between mass and weight?

Back

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