Identify the techniques used to separate the components of the given mixtures. 1. Faucet with cloth
2. Nails attracted by magnets
3. Pouring off liquid from rice
4. Sorting buttons with different colors
5. Use of sieve to produce finer sand

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

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.