Kinetic and Potential Energy
What is Kinetic energy?
The energy that comes from motion.
Define mechanical energy?
Potential and kinetic energy to do work.
What is Chemical energy?
It is released during a chemical reaction.
What is the most common way to generate electricity?
By burning fossil fuels in power plants.
Name the three types of fossil fuels?
Coal, petroleum and natural gas.
What is Potential Energy?
The energy that is stored in objects.
What is thermal energy?
Takes the form of heat.
What part of the cell helps humans to burn the nutrients that we eat and lets us have a constant temperature in our body?
Mitochondria.
What is sound energy?
It comes from a source that produces vibrations?
True or False: Renewable energy sources are unlimited?
True
What is Gravitational Potential Energy?
Potential energy transforming into kinetic energy.
Name the three ways heat can be transferred?
Convection, conduction and radiation.
How does a plant produce chemical energy?
Through photosynthesis.
Can sound travel through a vacuum?
No sound cannot travel through a vacuum.
Name three types of renewable energy?
Wind, Solar, Water, Geothermal and Biomass energy.
Which objects can be used to measure elastic potential energy?
A bow and arrow or a slingshot.
What is convection?
Convection is the circular motion that happens when warmer air or liquid — which has faster-moving molecules, making it less dense — rises, while the cooler air or liquid drops down.
Name the two types of light energy?
Artificial and natural light.
True or false: Nuclear Power stations pollute the environment?
False they don't pollute the air but they are radioactive.
What type of material does a Nuclear power station use?
Uranium ore.
What is the 'Law of conservation of energy'?
Energy can neither be created nor destroyed. Energy can only be transferred or changed from one form to another.
Define radiation?
Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material. E.g A hot pan on a stove.
True or false: Only 10% of energy in a light bulb is used to create light?
True - the rest is heat.
Name two Nuclear Power disasters?
Fukushima and Chernobyl.
Why are non-renewable energy sources harmful for our environment?
They are limited (they will run out) and they pollute the earth.