unit 3 - life on earth

Question 1

Population growth:

H__ D__
D__
O__F__
I__A__
G__P__
C__C__
A__R__
O__ and C___ spills
S__ and l__ pollution

Answer 1

Habitat Destruction
Deforestation
Overfishing
Intensive Agriculture
Genetic Pollution
Climate Change
Acid Rain
Oil and Chemical spills
Sea and land pollution

Question 2

3 things animals & plants depend on each other for

Answer 2

• Food (for energy)
• Shelter (for protection from predators/weather)
• Pollination (to help them reproduce)

Question 3

Natural hazards:

F__ F__
E__
T__
F__
V__ a__

Answer 3

Forest fires
Earthquakes
Tsunamis
Floods
Volcanic activity

Question 4

Nitrogen is needed for ___

Answer 4

Proteins

Question 5

Nitrogen is absorbed by plants through their ___ in the form of __

Answer 5

Roots
Nitrates

Question 6

Nitrogen can be added to soil on the form of:

Answer 6

Fertiliser
Manure
Compost

Question 7

Survival behaviours:

Answer 7

Swarming
Huddling
Imprinting
Migrating
Communication