Ch 3 Energy in Ecosystems

Question 1

bacteria

Answer 1

1

Question 2

carnivore

Answer 2

an animal that eats only other animals

Question 3

cell

Answer 3

1

Question 4

food chain

Answer 4

shows the path of food energy in an ecosystem from plants to animals; the first link in a food chain is a producer, most producers are green plants

Question 5

food web

Answer 5

two or more food chains overlap

Question 6

herbivore

Answer 6

an animal that eats only plants

Question 7

microorganism

Answer 7

a tiny living thing that can be seen only with a microscpe

Question 8

omnivore

Answer 8

an animal that eats both plants and animals

Question 9

photosynthesis

Answer 9

plants make their own food through this process

Question 10

plankton

Answer 10

microorganisms that live in water and form the beginning of most ocean food chains

Question 11

What happens to available energy at each link in the food chain?

Answer 11

some of the food energy is used, therefore less energy is available the further a population of organisms is from the producers in the chain

Question 12

What is the primary source of energy in most ecosystems?

Answer 12

Sun

Question 13

What does a food chain show?

Answer 13

Most ecoystems show that energy flows from the sun to producers, and then to consumers.

Question 14

How can an animal be both prey and predator?

Answer 14

A fox can be a predator hunting rabbits and it can be a prey to a bobcat.

Question 15

What are the 3rd and 4th links in a food chain?

Answer 15

They are either omnivores or carnivores.

Question 16

Forest food chain link

Answer 16

plant - herbivore - omnivore - predator

Question 17

What is the 1st link in a food chain?

Answer 17

producer

Question 18

What is the difference between food chain and food web?

Answer 18

food web has more than one food chain; some plants and animals link together in many overlapping food chains to make a food web

Question 19

Divide desert organisms into two categories, prey and predator.

Answer 19

Prey - kangaroo rats, creote bush grasshopper, flicker, kangaroo, jackrabbit

Predator - hawk, flicker

Question 20

List two food chains that overlap?

Answer 20

1. desert food web

2. ocean food web

Question 21

Show the sequence of energy flow in an ecosystem

Answer 21

1. plants produce their own food using the sun (producers)
2. herbivores eat the plants, herbivores are prey to omnivores and carnivores.
3. Energy is transferred in each sequence but less energy is available at the top of the pyramid.

Question 22

cell

Answer 22

basic unit that makes up all living things

Question 23

microorganism

Answer 23

an organism that cannot be seen without the help of a microscope (examples: algae, amoebas, yeast and bacteria)

Question 24

bacteria

Answer 24

microorganisms found in all living organisms and everywhere on Earth.

Question 25

How are microorganisms helpful?

Answer 25

1. They help digest food and get nutrients you need. | 2. They break down dead plants and animals into nutrients that living things can use.

Question 26

Why are microorganisms important in ocean food chains?

Answer 26

1. They produce most of the oxygen on Earth. | 2. They ocean animals feed on plankton.