Generating Electricity TTO 1

We can only make electricity from fossil fuels. True or False?

• Science can't answer this.
• TRUE
• This only applies to America.
• FALSE

What are the 3 fossil fuels?

• Coal, Crude Oil, Natural Gas
• Coal, Wood, Cooking Oil
• Wood, Petrol, Natural Gas
• British Gas, Coal, Wood

Where do solar (photovoltaic) cells get their initial energy from?

• The sky.
• The Sun.
• Rain
• The National Grid.

Some people are correct in thinking that wind turbines use too much electricity to be constantly running 24/7. True or False?

• FALSE
• Only true in the summer.
• TRUE
• Scientists can't be sure.

What do we call the type of thermal energy ‘locked-in’ deep under the Earth’s   surface?

• Volcano
• Fountain
• Geothermal
• Cracking

The diagram shows an electric energy generation and transmission network.What is the function of the part labeled X in this network?

• to generate electricity
• to store electricity for future use
• to transmit electricity to homes
• to convert electric energy to other forms of energy

Patrick is working with a corded drill. He observes that when he presses the trigger, the drill bit rotates and helps to drill a hole in the wall.Which energy transformation is taking place in this process?

• chemical energy to electrical energy
• electrical energy to chemical energy
• electrical energy to mechanical energy
• mechanical energy to electrical energy

Which statement describes the relationship between electric generators and electric motors?

• Both electric generators and electric motors use motion in a magnetic field to produce electric current.
• Both electric generators and electric motors transform current from a magnetic field into mechanical energy.
• Generators transform mechanical energy into electrical energy whereas electric motors transform electric energy into mechanical energy.
• Generators transform electrical energy into mechanical energy whereas electric motors transform mechanical energy into electrical energy.

A student notices that every time the button for the doorbell is pressed, the doorbell rings. As soon as the button is released, the doorbell stops ringing.What kind of energy transformation takes place when the switch of the doorbell is pressed?

• electrical energy to sound energy
• mechanical energy to heat energy
• chemical energy to electrical energy
• electrical energy to chemical energy

The image shows a solar panel installed on the roof of a home.What energy is transformed directly into the light, sound, and heat produced by the television?

• chemical
• electrical
• mechanical
• solar