Comp 3 - Changes/Properties in matter Study Guide

Which of the following is an example of physical change

• Rusting a bike

• Combining baking soda and vinegar

• Bending a nail

• Nuclear reaction of the sun

Which of the following statements is true?

• B is more soluble than C

• A is a supersaturated solution

• C is more soluble than A

• B is a supersaturated solution

Jennifer poured sugar into a glass of water and noticed that it dissolved. She measured the properties of the water and noticed that is did not change. Which best explains what she is observing?

• Physical change, because the substances started to bubble and create a new gas

• Chemical change, because the substances have changed colors and are different things now

• Physical change, because the substances stayed the same, they are just mixed together now

• Chemical change, because the substances have the same properties with a different form

Tags

NGSS.MS-PS1-2

If ice melts in a closed system (cannot escape) what happens to the total mass involved?

• The mass increases

• The mass stays the same

• The mass becomes 0

• The mass decreases

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Put the liquids in order from most dense to least dense?

• 4, 3, 2, 1
• 1, 2, 3, 4
• 3, 4, 2, 1, 
• 4, 3, 1, 2

Tags

NGSS.MS-PS1-2

How can you increase the rate in which a chemical reaction happens?

• Increase the temperature

• Decrease the temperature

• Decrease the amount of substance

• separate the substances

Tags

NGSS.HS-PS1-5

John fills a graduated cylinder with 50 mL of water. He then drops a 60g key into the graduated cylinder. The water level inside the graduated cylinder rose to 53 mL as shown below.

What is the volume of the key?

• 3 mL

• 20 g/mL

• 53 mL

• 50 mL

If you are given two different quantities of two unknown liquids, what property can you use to determine if they are the same? And why?

• Density, because it is NOT dependent on size

• Mass, because it is dependent on size

• Boiling point, because it is dependent on size

• Weight, because it is NOT dependent on size

A coach wants to replace the playground equipment after several students complained of

suffering burns on a hot day. The table provides information on several materials and their thermal conductivity (higher number = higher thermal conductivity)

Iron - 80.2

Plastic - 0.2

Stainless - 15.1

Aluminum - 237

Which material would most likely burn students if they used it?

• Iron because it is the strongest due to its density.

• Stainless steel because it has the greatest density.

• Plastic because it has the lowest thermal conductivity.

• Aluminum because it has the greatest thermal conductivity

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of the following is the correct definition of density?

• The amount of stuff in an object

• The amount of space an object takes up

• A measure of the force of gravity on an object

• The amount of matter (mass) packed into a space (object)