Fuels
What kind of fuels such as coal and oil are made from ancient, decayed, organic matter?
fossil fuels
What unit of measurement is used to measure electrical energy?
watts
Name two types of nonrenewable energy sources.
Coal, oil, natural gas, and nuclear power are all nonrenewable.
In physics, what is energy?
The ability to do work.
Fuels are burned in order to give us energy. Burning something requires for that material to combine with which chemical element that is found in the air?
oxygen
Electric vehicles do not use fuel. Instead, they store energy in these rechargeable items, much like our mobile phones.
batteries
Name 3 types of renewable energy sources.
Solar, wind, hydroelectric, geothermal, ocean/marine current, ocean thermal conversion, and biofuels are all renewable energy sources.
What is the basic unit for measuring energy?
joules
What do you call a car or vehicle that uses a combination of battery power and fuel power?
a hybrid vehicle
What do you call a place that generates electricity for a large population, like an entire city?
a power plant
or
a power station
What source of energy gives people and animals the power to move around?
food
What country consumes the most energy?
China
This substance, the most common element in the universe, number 1 on the periodic table, can be used as a clean-burning, renewable fuel. When burned, it creates water instead of carbon dioxide.
hydrogen
How do you define the amount of energy in 1 watt of electrical power?
one joule per second
( 1 j. / sec. )
What kind of energy is taken from the heat in the earth?
geothermal energy
What famous physicist said that energy is related to the mass of the object and the speed of light?
His Theory of Relativity was:
E=mc2
Albert Einstein
Some fuels are renewable and made from plants. For example, diesel fuel made from vegetable oil or alcohol made from corn or sugar. What do we call these kinds of fuels?
biofuels
A nuclear power plant heats water. This creates steam. The steam turns a machine that can generate electricity. A windmill uses the force of wind to turn a similar machine. What do you call the part of the generator that turns around from the force of the steam or wind in order to generate electricity?
a turbine
What kind of power is generated from the force of moving water, usually a dam in a river?
hydroelectric power
What law of physics states: "Energy can neither be created nor destroyed, but it can be converted from one form to another."
The Law of Conservation of Energy