Matter and Change Assessment

Which of the following is a true statement about every pure chemical compound?

• Compounds cannot be separated.

• Compounds consist of two or more elements that are combined chemically.

• Compounds are combined in any proportion.

• Compounds can be separated by a physical change.

What is the difference between a mixture and a compound?

• All mixtures have a uniform composition.

• All mixtures are heterogeneous.

• Mixtures can be separated by physical processes.

• Mixtures are made of at least two different elements.

What is another term for homogeneous mixtures?

• compounds

• solutions

• atoms

• molecules

Carbon dioxide (CO₂) is an example of which type of substance?

• element

• heterogeneous mixture

• compound

• solution

Tags

NGSS.MS-PS1-1

Which of the following is a molecule but not a compound?

• Laughing Gas (N₂O)

• Carbon Monoxide (CO)

• Water Vapor (H₂O)

• Oxygen Gas (O₂)

Tags

NGSS.MS-PS1-1

Complete the following classification of matter flow chart.

a

b

c

d

e

f

g

h

Mixture

Homogeneous

Gold

Water

Compound

Salt Water

Heterogeneous

Pure Substance

Which of the following is defined as a compound that contains carbon, excluding carbonates and carbon oxides?

• Inorganic Compound

• Metalloid

• Solution

• Organic Compound

Tags

NGSS.HS-LS1-6

How would you classify the following substance? Copper Sulfate (CuSO₄).

• Compound

• Heterogeneous Mixture

• Element

• Homogeneous Mixture

Tags

NGSS.MS-PS1-1

Which of the following is an example of a physical change?

• Baking a cake

• Ice melting into water

• Rust forming on a bicycle

• Digestion of food

Tags

NGSS.MS-PS1-4

Which of the following is an example of a chemical change?

• Boiling

• Grinding 

• Melting

• Combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5