Food Chain

Question 1

Biotic factors

Answer 1

The relationships between LIVING organisms

Question 2

What order do food chains follow? (A)

Answer 2

Primary producer–>primary consumer–>secondary consumer–>tertiary consumer–>quaternary consumer

Question 3

What order do food chains typically follow? (B)

Answer 3

Plant–>herbivore–>carnivore–>carnivore–>carnivore

Question 4

What is an example of a food chain?

Answer 4

Phytoplankton–>zooplankton–>herrings–>tuna–>shark

Question 5

Define food chain.

Answer 5

A food chain shows how energy passes from one organism to another.

Question 6

Define food web.

Answer 6

A diagram showing the energy flow in ecosystems.

Question 7

Example of a food web

Answer 7

Acorns (oak tree)–>mouse–>(snake–>)hawk

Question 8

What do arrows in food webs/chains represent?

Answer 8

The energy flow.

Question 9

Energy use example

Answer 9

If caterpillar consumes 200j

100j-feces, 33j growth (new biomass), 67j cellular respiration

Question 10

How much energy is transferred and lost between each trophic level?

Answer 10

10% is transferred; 90% is lost.

Question 11

What does a pyramid of energy show?

Answer 11

The amount of energy available at each trophic level.

Question 12

Create the energy pyramid.

Answer 12

10j tertiary
100j secondary
1,000j primary
10,000j plants/producers
1,000,000j sunlight

Question 13

How much of your body weight do you need to eat to maintain it?

Answer 13

10 times your body weight each year.

Question 14

How much does the average teen eat?

Answer 14

4 pounds each day.

Question 15

If you weighed 146 pounds, how much should you eat to stay that weight?

Answer 15

1,460 pounds that year.

Question 16

What does your final weight depend on?

Answer 16

Calorie expenditure.

Question 17

Why should you eat lower on the food chain?

Answer 17

90% of plants spared; 9 more people fed when eating on a lower food chain diet.

Question 18

If you ate beef and you weighed 150 pounds, how much cow would you need to eat and how much corn would that total?

Answer 18

1,500 lbs of cow=15,000 lbs of corn. You could simply eat 1,500 lbs of corn.

Question 19

How much water do cows drink? How much do they poop?

Answer 19

15 gal of water/day; 50 lbs of manure/day

Question 20

Livestock are fed what percent of all harvested grain?

Answer 20

40%.

Question 21

What can manure do to the water supply?

Answer 21

Manure pollutes water supply.

Question 22

What do cows produce when they poop?

Answer 22

Methane gas; this increases air pollution.

Question 23

What is another reason that raising cattle is bad for the environment?

Answer 23

They use up land to be used for rain forests or crops.

Question 24

What is a pyramid of numbers?

Answer 24

A diagram that shows the population of each trophic level.

Question 25

An example of a pyramid of numbers?

Answer 25

Trophic level---Number of individual organisms
Tertiary cons.---3
Secondary cons.---300,000
Primary cons.---700,000
Primary prod.--- 5,000,000