DB Mid-term Exam part 1

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What evidence indicates a chemical change is occurring?

Back

A flame burning on the surface of a solid is a strong indicator of a chemical change.

Front

What is Newton's 3rd Law of Motion?

Back

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

Front

True or False: All chemical reactions create new substances.

Back

True.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object, acting in the opposite direction.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What happens to the potential energy of an object as it falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid without altering its chemical composition.