Unit 2 Changes in Matter

Front

What is the formula for glucose?

Back

C6H12O6

Front

How many hydrogen atoms are in a glucose molecule?

Back

12

Front

What type of reaction absorbs heat and feels cold?

Back

Endothermic reaction

Front

What type of reaction releases heat and feels hot?

Back

Exothermic reaction

Front

What is a chemical reaction?

Back

A process that involves the transformation of one or more substances into different substances.

Front

What is a physical change?

Back

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

Front

What is the ion formed by lithium in group 1 of the periodic table?

Back

Li+

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not.

Front

What is an example of an endothermic reaction?

Back

Photosynthesis, where plants absorb sunlight.

Front

What is an example of an exothermic reaction?

Back

Combustion of fuels, such as burning wood.