farming techniques

Question 1

how can the efficiency of food production be increased?

Answer 1

• by restricting energy transfer from food animals to the environment
• this can be done by limiting their movement
• by controlling the temperature of their surroundings

Question 2

how does this make farming more efficient?

Answer 2

-animals use less energy moving around and controlling their body temperature
-so more energy is available for growth, so more food can be produced from the same input of resources

Question 3

what are some animals fed to increase growth?

Answer 3

high-protein foods

Question 4

what is factory farming?

Answer 4

where livestock are raised in small pens

Question 5

negatives of factory farming

Answer 5

• disease can spread easily as kept close together
• ethical objections as the conditions are unnatural and uncomfortable

Question 6

what is happening to fish stocks and why?

Answer 6

they are declining because we’re fishing too much

Question 7

consequence of declining fish stocks

Answer 7

• fewer fish for us to eat
• ocean’s food chains are affected
• some species of fish may disappear in some areas

Question 8

why is it important to maintain fish stocks?

Answer 8

certain species may disappear altogether in some areas

Question 9

what can we do to tackle declining fish stocks?

Answer 9

maintain fish stocks at a level where the fish continue to breed

Question 10

two ways that fish stocks can be maintained

Answer 10

• fishing quotas
• net size

Question 11

fishing quotas

Answer 11

• limits on the number and size of fish that can be caught in certain areas
• prevents certain species from being overfished

Question 12

net size

Answer 12

• limits on the mesh size of the fish net
• to reduce the number of unwanted and discarded fish
• using a bigger mesh size will let the unwanted species escape
• means younger fish will slip through the net, allowing them to reach breeding age