Match the following vocabulary words. 1.
Atomic particle with a positive charge
proton
2. Atomic particle with a neutral charge
atom
3. Having neither a positive nor a negative electrical charge
neutron
4. Atomic particle with a negative charge
electron
5. The smallest part of any object
neutral
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answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.