Front

What is the role of energy in chemical reactions?

Back

Energy is crucial for breaking and forming chemical bonds during reactions.

Front

What does the law of conservation of mass state?

Back

The total mass of reactants equals the total mass of products in a chemical reaction.

Front

How is thermal energy absorbed?

Back

Thermal energy is absorbed through conduction, convection, and radiation.

Front

What happens to atoms during a chemical change?

Back

Atoms are rearranged to form new substances, but the total number of atoms remains unchanged.

Front

What are physical properties?

Back

Physical properties are observable and measurable characteristics of a substance.

Front

What is a chemical change?

Back

A chemical change involves the rearrangement of atoms to form new substances.

Front

What is the difference between physical and chemical properties?

Back

Physical properties can be observed without changing the substance, while chemical properties describe how a substance reacts.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What is the significance of a balanced chemical equation?

Back

A balanced chemical equation shows that mass is conserved during a chemical reaction.