Describe what happens to the arrangement and movement of particles when a substance boils.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

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.