Questions
What are the two states in which energy exists?
Kinetic and potential.
Renewable energy sources are found in deposits beneath the Earth.
Non-Renewable energy sources are found in deposits beneath the Earth.
_____________________ trap the energy of the Sun and transform it into electricity.
Solar panels
Say one example of a non-renewable energy source.
Coal, petroleum, Natural gas
What are the main properties of energy?
It can be tranferred, stored, transported and transformed.
Nuclear energy comes from natural resources that will never run out.
Renewable energy comes from natural resources that will never run out.
Carbon dioxide and other gases causes that our planet gets hotter. This increase in temperature is called __________________.
Global warming
Say one example of a renewable energy source that transforms the kinetic energy from running water into electricity.
Hydroelectric energy (dam), Tidal energy,
What are the two main types of non-renewable energy sources?
Fossil fuels and Uranium.
In tidal energy, chemical energy from plants and animals is transformed into electrical energy.
In biomass, chemical energy from plants and animals is transformed into electrical energy.
In _____________________ electricity is produced by kinetic energy from moving water.
Hydroelectric/Tidal energy
Say one example of renewable energy source that needs the heart of the Earth to produce electricity.
Geothermal energy.
What are the negative consequences of burning fossil fuels?
Global warming and acid rain.
In wind turbines, the potential energy is transformed into electricity.
In wind turbines, the kinetic energy is transformed into electricity.
Energy can be __________________ from one object to another.
transferred
Say one example of advantage of nuclear energy.
Nuclear energy does not pollute the atmosphere.
It is cheap to produce and it does not create a lot of waste.Very small amounts of uranium produce large amounts of energy.
What is the main disadvantage of Geothermal energy?
Building a geothermal power plant is expensive.
How energy reaches our homes.
Power stations - Transformers - Power lines - Distribution cables - Local transformer - our homes
How energy reaches our homes.
Power stations - Transformers - Power lines - Local transformer - Distribution cables - our homes
________________ is a thick liquid found in rocks near the Earth's surface.
Petroleum
Say two examples of gases produced by burning fossil fuels.
Carbon dioxide, sulphur dioxide, nitrogen dioxide.