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English 29 Public

Questions about matter, seperation techniques, combustion, oxidation and fermentation

Study Slideshow

Give 3 examples of problems caused by combustion.

Global warming, respiratory illnesses and acid rain.

15

What is oxidation?

It is a chemical reaction in which an atom loses one or more electrons to another atom.

20

Can you describe what happens during the oxidation of a half eaten apple.

Students own answer

20

What do we call the oxidation of iron?

Rusting

10

What happens to a car when it starts to rust?

It turns orange/red and becomes brittle.

15

How can we prevent iron from rusting?

By painting it.

15

Can you think of an example where browning in fruit is desirable?

Turning grapes to raisins.

10

What three things can be used for fermentation?

Yeast, bacteria and microorganisms,

15

Is fermentation a physical or chemical change?

A chemical change

10

What is yeast?

It's a microscopic unicellular fungus

15

Explain what happens in the fermentation process of yeast.

yeast consumes sugar and converts it into alcohol and carbon dioxide

20

Name three things that can be made by fermentation.

Students own answers

15

Wha special fungus is sometimes added to cheese to make it softer?

penecillium

10