Measuring & Physical/Chemical changes

In physical changes, substances might change in __________ but not in __________.

• appearance, composition
• volume, state of matter
• texture, color
• weight, mass

A physical change can sometimes result in a color change. Which of the following situations show this?

• Milk turns yellow when it spoils.
• Dough becomes darker when it is baked into cake.
• A red candy dissolves and turns water pink.
• A match turns black when it is burned.

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Blue Color: Chemical or Physical Property

• Chemical Property
• Physical Property

Solubility (ability to dissolve): Chemical or Physical Property

• Chemical Property
• Physical Property

Melting Point: Chemical or Physical Property

• Chemical Property
• Physical Property

How long is the red box in centimeters (cm)? Measure to 3 significant figures.

Do not include the units.

My reaction to the quiz so far is..

• Completely confident

• A little confident

• A little unsure

• Completely unsure

Mass = 8 g, Volume = 4mL..... what is the density?

• 12 g/mL

• 32 g/mL

• 4 g/mL

• 2 g/mL

Answer explanation

Density equals mass divided volume.

The mass of the object is 8 grams.

The volume of the object is 4 mL.

8 divided by 4 is 2.

So the density is 2 grams/mL.