Chemical reactions

Cutting a piece of wood is an example of a

• physical change

• chemical change

• nuclear change

• natural change

Burning a piece of is an example of a

• chemical change

• physical change

• nuclear change

• natural change

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The new substances formed during chemical reactions are called

• products

• reactants

• substrates

• catalysts

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Changes that require energy to be absorbed are called

• endothermic changes

• exothermic changes

• monothermic changes

• polythermic changes

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The equation above is an example of a

• decomposition reaction

• synthesis reaction

• single displacement reaction

• double displacement reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Combustion reactions involve burning a substance. These types of reaction require which element?

• oxygen

• hydrogen

• nitrogen

• helium

Tags

NGSS.MS-PS1-1

The amount of energy needed to start a chemical reaction is called

• activation energy

• reduction energy

• oxidation energy

• synthetic energy

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

Substances that speed up chemical reactions are called

• catalysts

• reactants

• substrates

• precipitates

Tags

NGSS.HS-PS1-5

Substances that slow down chemical reactions are called

• inhibitors

• stimulants

• enzymes

• motivators

A way to show a chemical reaction using symbols instead of words.

• chemical equation

• chemical formula

• chemical statement

• chemical notation

Tags

NGSS.MS-PS1-1