Chemical Reactions Unit Test Part 5 41-50

Front

What type of reaction releases heat into the surroundings?

Back

Exothermic reaction.

Front

What type of reaction absorbs heat from the surroundings?

Back

Endothermic reaction.

Front

What is a chemical reaction?

Back

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

Front

What is the law of conservation of mass?

Back

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

Front

What is an example of an exothermic reaction?

Back

Combustion of fuels, such as burning wood or gasoline.

Front

What is an example of an endothermic reaction?

Back

Photosynthesis in plants, where they absorb sunlight to convert carbon dioxide and water into glucose.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

New substances formed as a result of a chemical reaction.

Front

What is a catalyst?

Back

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

Front

What is an indicator of a chemical reaction?

Back

Signs such as color change, temperature change, gas production, or precipitate formation.