Chemical Reactions

Which is an indication that a chemical change is taking place?

• Iron changes color when heated.

• Gas bubbles form in boiling water

• Solid wax forms when melted wax falls in ice water

• A gas forms when vinegar and baking soda are mixed

Tags

NGSS.MS-PS1-2

How much water (H2O) should be formed in this chemical reaction?

• 5g

• 9g

• 27g

• 31g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many atoms of oxygen are in a molecule of glucose, C₆H₁₂O₆?

• 1

• 6

• 12

• 24

Tags

NGSS.MS-PS1-1

What number and types of atoms occur in a formula unit of Ca(NO3​)2​?

• carbon atom, 1 neon atom, and 6 oxygen atoms

• calcium atom, 2 neon atoms, and 3 oxygen atoms

• carbon atom, 1 nitrogen atom, and 3 oxygen atoms

• calcium atom, 2 nitrogen atoms, and 6 oxygen atoms

Tags

NGSS.MS-PS1-1

Olivia and Mason were having a science experiment in the kitchen. Olivia left a glass of milk on the counter overnight as part of their experiment. The next day, they discovered it had gone sour. This is a (a)   change.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

fireworks exploding ​ (a)  

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Match the following

• Single Replacement

• 
• Synthesis

• 
• Combustion

• 
• Decomposition

• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is the product.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Bubbles form when two or more substances are combined is a (a)   (b)  

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

An explosion occurs is a (a)  

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5