Grasses living in an area have shallow but widespread roots that grab the ground. They can grow their leaves fast even after losing them.
What can we say about these plants?

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.