First Semester Final Exam Review

What should you do first when entering a chemistry lab?

• Start the experiment immediately

• Put on safety goggles

• Light the Bunsen burner

• Talk with your friends

If you need to leave your lab station while your Bunsen burner is lit, you should:

• Leave it burning

• Turn it off completely

• make sure someone is there

• Lower the flame

Which piece of lab equipment is used to measure liquid volume most accurately?

• Beaker

• Graduated cylinder

• Test tube

• Watch glass

What is the main purpose of a wire mesh in lab equipment?

• To filter solutions

• To support beakers over heat

• To clean glassware

• To measure mass

What is the fundamental difference between a compound and a mixture?

• Compounds are always gases

• Mixtures can be separated by physical means

• Compounds can only be liquids

• Mixtures are always homogeneous

The Tyndall effect is used to distinguish between:

• Elements and compounds

• Solids and liquids

• Colloids and suspensions

• Metals and nonmetals

Tags

NGSS.MS-PS1-2

Salt water is an example of a:

• Heterogeneous mixture

• Homogeneous mixture (solution)

• Pure substance

• Colloid

Milk is classified as a:

• Pure substance

• Solution

• Colloid

• Suspension

Which is a chemical property?

• Melting point

• Color

• Flammability

• Density

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-6

When butter melts, this is an example of a:

• Chemical change

• Physical change

• Nuclear change

• Molecular breakdown

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5