Matters

.........changes include changes of state and changes in shape or form

• Physical

• Chemical

• Physical and Chemical

Choose the pictures that show physical changes:

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The law of conservation of mass states that no atoms are lost or made in a chemical reaction. Instead, the atoms join together in different ways to form products.

• True

• False

Calculations using the law of conservation of mass

• 49

• 50

• 51

• 22

Calculations using the law of conservation of mass

• 48

• 128

• 32

• 22

What is the reaction type that showing here?

• Exothermic reaction

• Endothermic reaction

What is the reaction type that showing here?

• Exothermic reaction

• Endothermic reaction

It is a chemical process in which a substance reacts rapidly with oxygen and gives off heat

• Burning

• Ignition

• Combustion

Ripening of a fruit is a chemical change

• True

• False

Is souring of milk a physical change or a chemical change

• physical change

• chemical change