Physical and Chemical Changes

A change that only alters the form or appearance of a substance without changing it into a different substance is called a ___________.

• physical change

• chemical change

• reactant

• product

A change in matter that produces one or more new substances is called a __________.

• physical change

• chemical change

• reactant

• product

Tags

NGSS.MS-PS1-2

Substances that undergo chemical changes are called __________.

• reactants

• products

• elements

• compounds

Tags

NGSS.MS-PS1-2

Substances that are formed when other substances undergo chemical changes are called __________.

• reactants

• products

• elements

• compounds

Tags

NGSS.MS-PS1-5

In an __________ reaction, the energy is released is greater than the energy required to break the bonds of the reactants, and the energy is usually released as heat.

• exothermic

• endothermic

• product

• reactant

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

In an __________ reaction, more energy is required to break the bonds of the reactants, absorbing energy leaving the surroundings feeling cold.

• exothermic

• endothermic

• product

• reactant

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A __________ helps increase the rates (speeds) of chemical reactions.

• catalyst

• reactant

• product

Tags

NGSS.HS-PS1-5

Which are three examples of physical changes?

• chopping wood, tearing paper, painting a wall

• burning wood, frying an egg, baking a cake

Which are three examples of chemical changes?

• chopping wood, tearing paper, painting a wall

• burning wood, frying an egg, baking a cake

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to the electrons in atoms when there is a chemical change?

• electrons are either shared or transferred between atoms

• nothing happens to the electrons between the atoms

• more electrons are created between the atoms

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2