Unit 4: ENERGY

Which of these energies can we see?

• Light energy

• Thermal energy

• Chemical energy

• Potential energy

Which of these energies can we feel?

• Light energy

• Thermal energy

• Chemical energy

What are turbines used for?

• To transform kinetic energy intro electrical energy

• To transform electrical energy intro kinetic energy

• To transform electrical energy intro thermal energy

• To transform light energy intro electrical energy

• To transform thermal energy intro electrical energy

Marine turbines use the kinetic energy from water currents to produce electricity.

• TRUE

• FALSE

Marine turbines are a type of non-renewable energy source.

• TRUE

• FALSE

Wind farms are renewable energy sources.

• TRUE

• FALSE

Sun is a renewable energy source.

• TRUE

• FALSE

Biomass is a renewable energy, but it pollutes.

• TRUE, because biomass is burned to obtained the energy

• FALSE, because it is made of recycled materials.

Digestion allows (permite) energy transformation in our bodies. How is this transformation produced?

• Chemical energy from food is transformed into kinetic energy and heat energy.

• Chemical energy from food is transformed only into electrical energy .

• Chemical energy from food is transformed into potential energy.

Light bulbs allow the next energy transformation:

• Electrical energy is transformed into light energy only.

• Electrical energy is transformed into light energy, but also heat energy, because they get hot.

• Electrical energy is transformed into and heat energy, but sound energy is not produce.

• None of the options are right!