According to the Big Bang Theory, the density and temperature of the Universe is now than in the past.

Which of the following is not am example of a polymer? protein nylon kevlar concreta

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.