Science TEST Review (Chemistry)

Front

What is a chemical change?

Back

A chemical change is a process where substances transform into different substances with new chemical properties, often involving the breaking and forming of bonds.

Front

What happens to particles/atoms when they vibrate or move slower?

Back

When particles/atoms vibrate or move slower, they move closer together.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity, such as color, taste, or boiling point.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy (heat) from its surroundings.

Front

What occurs when energy or heat is added to a solid?

Back

When energy or heat is added to a solid, it can change into a liquid, a process known as melting.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the process of melting?

Back

Melting is the process where a solid turns into a liquid as it absorbs heat.

Front

What is the significance of energy in chemical reactions?

Back

Energy is crucial in chemical reactions as it can be absorbed or released, influencing the reaction's direction and rate.

Front

What is the definition of a solid?

Back

A solid is a state of matter characterized by a definite shape and volume, with closely packed particles.

Front

What is the definition of a liquid?

Back

A liquid is a state of matter that has a definite volume but takes the shape of its container, with particles that are less tightly packed than in a solid.