Class assignment

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

Front

What are reactants in a chemical equation?

Back

Substances that undergo a chemical change in a reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Substances that are formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does it mean for a chemical equation to be balanced?

Back

It means that the number of atoms of each element is the same on both sides of the equation.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes state but not chemical composition.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change because it produces new substances like ash and smoke.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.

Front

What is a decomposition reaction?

Back

A type of chemical reaction where one compound breaks down into two or more simpler substances.