Topic # 1-3 Chemistry Review

H²O is...

• 2 parts hydrogen 1 part oxygen

• 2 parts hydrogen 2 parts oxygen

• 2 parts hydrogen 0 parts oxygen

• 2 parts hydrogen 1 part aluminium

Which of the following is an example of a mechanical mixture/heterogenous mixture?

• Water

• cereal and milk

• brass

• salt water

An electron is:

• Neutral 
• Positively Charged 
• Electrostatic 
• Negatively Charged 

An explosion is an example of a: 

• Chemical Change 
• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Joe places a whole orange on a scale and finds that the reading on the scale is the same as when he cuts the orange into segments on the scale at one time. The reading on the scale show an example of which scientific law?

• the law of conservation of energy

• the of conservation of mass

• the law of gravity

• the law of inertia

The __________ contains the protons and neutrons of an atom, and is most of the mass of an atom

• Nucleus
• Atomic Number
• Atomic Mass
• Electrons

Tags

NGSS.MS-PS1-1

What is this WHMIS symbol?

• Explosive

• Health Hazards

• Corrosive

• Toxic

What is this WHMIS symbol?

• Toxic

• Flammable

• Reactive

• Compressed Gas

Is cutting a piece of paper a chemical or physical change?

• Chemical

• Physical

A physical change produces new substances

• FALSE 
• TRUE