Chemical Changes and Chemical Reactions

The reactants in the image above are:

• CH4 and 2 O2

• 2 H2O and CO2

• All of these are reactants

• All of these are products

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The products in the image above are:

• CH4 and 2 O2

• 2 H2O and CO2

• All of these are reactants

• All of these are products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When energy like heat and light are given off in a chemical reaction it is called

• exothermic

• endothermic

• eccentric

• ectomorphic

Tags

NGSS.MS-PS1-4

When energy is absorbed and taken in during a chemical reaction it is called

• exothermic

• endothermic

• eccentric

• ectomorphic

Tags

NGSS.HS-PS1-4

When the matter in a chemical reaction gets colder it is called

• exothermic

• endothermic

• eccentric

• endomorphic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When the matter in a chemical reaction gets warmer it is called

• exothermic

• endothermic

• eccentric

• endomorphic

Tags

NGSS.MS-PS3-4

You know that a chemical reaction is occurring here because you see __________________ . (Pick 3)

• purple color

• smoke

• ice formation

• fire

• a yellow precipitate

Tags

NGSS.MS-PS1-2

In a chemical reaction, the number of atoms in the reactants and the products...

• Must be the same

• Must be different

Tags

NGSS.MS-PS1-5

Which of these is NOT a sign of a chemical reaction?

• A phase change

• Formation of a precipitate

• A color change

• A temperature change

Tags

NGSS.MS-PS1-2

You have 2 chemicals, CHEMICAL A and CHEMICAL B. They are both liquids. When you combine them you notice some crystals starting to form within them. Did a chemical reaction occur?

• Yes

• No

Tags

NGSS.MS-PS1-2