Infraclass: Placentals
Placental mammals are the most diverse group of mammals with about 4000 discovered species.
Answer:
Petroleum
Hydrocarbon gas liquids
Natural gas
Coal
Nuclear energy
Explanation:
These energy sources are called nonrenewable because their supplies are limited to the amounts that we can mine or extract from the earth. Coal, natural gas, and petroleum formed over thousands of years from the buried remains of ancient sea plants and animals that lived millions of years ago. That is why we also call those energy sources fossil fuels.
Most of the petroleum products consumed in the United States are made from crude oil, but petroleum liquids can also be made from natural gas and coal.
Nuclear energy is produced from uranium, a nonrenewable energy source whose atoms are split (through a process called nuclear fission) to create heat and, eventually, electricity. Scientists think uranium was created billions of years ago when stars formed. Uranium is found throughout the earth’s crust, but most of it is too difficult or too expensive to mine and process into fuel for nuclear power plants.
The coefficient in a chemical formula represents the amount of each chemical present. The amount of a substance is measured in moles.
Condesation is: water that collects as droplets on a cold surface when humid air is in contact with it.
An example would be: having a cold soda on a hot day, the can "sweats." Water molecules in the air as a vapor hit the colder surface of the can and turn into liquid water.
