1. 1. Sound travels throughout vibrations waves:

• TRUE

• FALSE

2. We use electricity to power machines which can transform ............... :

• a)in chemical reactions

• b)in into charged particles

• c)in into other types of energy

• d) a and c are correct

3.Chemical energy can be in...

• a)fabric,food,organs,glass

• b)fabric,bread,pasta,fossils

• c)batteries,fossils,fuels,food

4. There are two types of Mechanical energy:

• a)Potential energy and kinetic energy

• b)Electrical energy and chemical energy

• c)Sound energy and light energy

5.What type of radiation has light energy?

• a)light radiation

• b)electromagnetic radiation

• c)none of them

6. Thermal energy is related with vibrations:

• a)True

• b)False

1.-An example of exothermic reactions is...

• a) Combustion

• b) Fuel

• c) Photosynthesis

2 Light energy is related with____radiation:

• a) Thermal

• b) Electrical

• c) Electromagnetic

3. How travel the sound energy?

• a) With wave

• b) With vibrations

• c) With movements of atoms

4. The thermal energy is related with:

• a) Movement of sound.

• b) Sound of atoms.

• c) Movement of atoms.