UNIT 5 REVIEW

Multiple Choice

In a chemical reaction atoms are...

• destroyed

• created

• rearrenged

• exploded

Multiple Choice

What clues indicate that a chemical reaction is taken place?

• -Enrergy change

  -Change in shape

• -Precipitate formation

  -Noise creation

• -Change of flavour

  -Energy change

• -Colour change

  -Gas formation

Fill in the Blanks

The substances that take place in a chemical reaction are called...

Multiple Choice

Photosynthesis is an exothermic reaction beacause it emits heat.

• TRUE

• FALSE

Multiple Choice

What three items are needed to make a fire?

• -Air

  -Wood

  -Light

• -Heat

  -Fuel

  -Nitrogen

• -Wood

  -Fuel

  -Oxygen

• -Oxygen

  -Heat

  -Fuel

Multiple Choice

Fire produces _____ that goes into the air, and _____ that are the remains of the fuel.

• air , ash

• smoke, ash

• ash, smoke

• smoke, air

Multiple Choice

Which substance produces oxidation?

• Combustion

• Nitrogen

• Oxygen

• Fermetation

Multiple Choice

What´s rust?

• Is a type of yogourt

• Is a green substance that appears in wood

• Is a reddish substance that appears in metals

• Is a type of bread

Multiple Choice

Which of these products are made through fermetation?

• Cheese, bananas and yogourt

• Rice, pizza and pasta

• Milk, bread and spinach

• Wine, yogourt and cheese

Multiple Choice

Fungi is used to ferment _____ and bacteria to ferment_____

• alcohol, milk

• milk, yogourt

• alcohol, lactic acid

• juice, aquarius