Which of the following isa harmful waste material that leaves the blood and travels through the lungs before leaving the body?

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.

Which three statements represent the benefits of performing experiments using computer simulations?

Which samples do the atoms have the least kinetic energy