Microscopes use mirrors to magnify objects. is this true or false?

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

How hot is the suns corona? (integrated science)

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.