Unit 1/2 test

What is this?

• element, pure substance

• compound, pure substance

• mixture

• compound, mixture

12 km = _____ m

• 1,200 m

• 12,000 m

• 120,000

• 1,200,000

Which of the following is a chemical property?

• Phase of matter

• Flammability

• Density

• Color

870 mm = ______ m

• 87 m

• 8.7 m

• 0.87 m

• 0.087 m

12 km = _____ m

• 1,200 m

• 12,000 m

• 120,000

• 1,200,000

A set of data are all close to each other, and they are close to the actual value.  This set of data can be described as...

• accurate
• precise
• both precise and accurate

How close a measurement is to the accepted value is called..

• Accuracy

• Precision

• Significant

• Estimate

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

• The Ping Pong Ball because it floats to the top 
• The bolt because it has sunk to the bottom
• The soda cap because it is not just full of air like the Ping Pong ball

What units can be used to express density?

• g/mL
• grams
• millimeters
• milliliters

If an object has a density of .6 g/mL and you put it into water, will it sink or float?  

• sink
• float