CT Review Grade 7

What two types of measurements make up DENSITY?

• Mass and volume

• Gram and centimeter

• Temperature and mass

• Volume and weight

Look at this image.  Which object has the LOWEST density in water? How? 

• The bolt because it has sunk to the bottom

• The Ping Pong Ball because it floats to the top 

• The soda cap because it is not just full of air like the Ping Pong ball

What units are used to measure mass?

• g

• g/cm³

• cm³

• cm³/g

What is the formula for density?

• density = mass x volume

• density = mass + volume

• density = mass / volume

• density = mass - volume

What is the density of water?

• 0 g/ml

• 1 g/ml

• 10 g/ml

• 100 g/ml

What is this tool called....

• Ruler

• Beaker

• Measuring Tape

• Measuring Cylinder

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL

• 7 g/cm³

• 28 g/cm³

• 1/7 g/cm³

If an object has a density of 0.6 g/mL and you put it into water, will it sink or float?  Why?

• Float

• Sink

If an object has a density of 3.6 g/mL and you put it into water, will it sink or float? Why?

• Float

• Sink

How much water has been displaced in the image shown?

• 20 mL

• 25 mL

• 40 mL

• 66 mL