C6.3 Interpreting And Interacting With Earth Systems

Question 1

Gases the earth’s early atmosphere contained

Answer 1

Carbon dioxide
Water vapour

Question 2

Problems with nitrogen monoxide (NO) and carbon monoxide (CO)

Answer 2

NO: Causes acid rain
CO: Poisonous gas, causes suffocation

Question 3

What does a deficiency of nitrogen in plants cause

Answer 3

Poor ROOT growth
Yellow leaves

Question 4

What does activated charcoal do

Answer 4

Attracts the indicator, allowing you to filter and remove it

Question 5

Hazard of using ammonia solution

Answer 5

Releases ammonia gas which is an irritant

Question 6

Colour change of phenolphthalein when acid from a burette is added to alkali in a conical flask

Answer 6

Pink —> colourless

Question 7

Enzyme used in the fermentation method to make ethanol

Answer 7

Yeast

Question 8

Why fermentation to make ethanol cannot be carried out above 35 degrees

Answer 8

Yeast enzyme will denature

Question 9

Catalyst used in hydration method of making ethanol

Answer 9

Phosphoric acid

Question 10

What NPK stands for

Answer 10

Nitrogen
Phosphorus
Potassium

Question 11

Greenhouse gases allow __ waves through them

Greenhouse gases allow _______ wavelength waves through them

Answer 11

UV

Shorter