Chemical and Physical change review

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, resulting in a decrease in temperature.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, resulting in an increase in temperature.

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 is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are some examples of chemical changes?

Back

Examples of chemical changes include rusting of iron, burning of wood, and baking a cake.

Front

What are some examples of physical changes?

Back

Examples of physical changes include melting ice, boiling water, and dissolving sugar in water.

Front

How can you identify a chemical change?

Back

Signs of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.

Front

How can you identify a physical change?

Back

Signs of a physical change include changes in state (solid, liquid, gas), shape, or size without any new substance being formed.

Front

What happens to energy during an endothermic reaction?

Back

During an endothermic reaction, energy is absorbed from the surroundings, leading to a decrease in temperature.

Front

What happens to energy during an exothermic reaction?

Back

During an exothermic reaction, energy is released into the surroundings, leading to an increase in temperature.