Quiz Review

What state of matter takes the shape of its container and doesn't have a definite volume?

• Solid

• Liquid

• Gas

In which state of matter do the particles only vibrate in place?

• solid
• liquid 
• gas 
• liquid and gas

Which of the following is a physical change?

•  Iron is oxidized to iron oxide

• Aluminum metal is pounded into thin sheets

• Copper reacts with a strong acid

• Sodium metal explodes on contact with water

Which of the following is an example of a chemical change?

• melting solid gold

• burning hydrogen gas

• dissolving sugar in water

• breaking a sheet of glass

Which of the following is a common sign that a chemical change has occurred?

• A chemical has changed size.

• A chemical has changed to a different state (solid, liquid or gas)

• A chemical has become a different shape.

• A chemical has turned a different color.

2) True or False: Extensive Properties change as the amount of substance changes.

• True

• False

How many significant figures are in 127.500?

How many significant figures are in 1200?

A student wants to test the effects of different types of exercise on heart rate.  What would be the dependent variable of the experiment?

• the measurement of heart rate

• type of exercise
• amount of exercise
• time of day exercise occurs

What would the INDEPENDENT variable be in an experiment testing which  paper airplane design goes furthest?

• the paper used
• the paper airplane design
• the distance of each plane's flight
• how hard the plane is thrown