<span>A: Some energy will be used to do work and some will be lost as heat.</span>
All matter is made of indivisible particles called atoms, which cannot be created or destroyed.
Compounds are combinations of atoms of
2 or more elements.
All chemical reactions involve the rearrangement of atoms.
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People with HIV are unable to fight off these rare diseases because they have a weakened immune system.
C. Desert
A. The tilt of the Earth's axis as it circles the Sun.
