How could you break down the compound calcium carbonate into the elements that make it up ? A. by melting
B. by crushing
C. with filter
D. with chemical changes

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

What is one real world example of a colligative property?

Which of the following is true about the speed of light? it depends on the wavelength.