Write a paragraph describing the series of events that occur in the operation of a complex machine that you have used recently. Identify the simple machines that make up parts of the complex machine.

ice to water 1 water to vapour 2 latent heat

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.

3. dark matter

empty space could also be a simple vacuum