Chapter 4

Question 1

Biodiversity

Answer 1

of species living in an ecosystem

Question 2

Living portion of the water cycle

Answer 2

Plants taking up water up from the roots

Question 3

Why do food chains only go up to a certain level?

Answer 3

Too much energy is lost to permit more levels

Question 4

The process of succession varies depending on

Answer 4

The initial environmental conditions and chance

Question 5

Conversion of nitrate to nitrogen gas is called

Answer 5

Denitrification

Question 6

Habitat

Answer 6

The place where a particular population of a species lives

Question 7

Community

Answer 7

The many species that live together in a habitat

Question 8

Ecosystem

Answer 8

A community and all of the physical aspects of its habitat

Question 9

Herbivores

Answer 9

Animals at the second trophic level that eats plants

Question 10

Carnivores

Answer 10

Animals at the third trophic level that eat other animals

Question 11

Abiotic factors

Answer 11

Physical aspects of an ecosystem (soil,water, weather)

Question 12

Energy pyramid

Answer 12

Amount of energy stored at each level determines the width of each block

Question 13

Energy passed on from a lower trophic level to a higher trophic level is about _________ from what it originally was

Answer 13

10%

Question 14

The process of combining nitrogen gas with hydrogen to form ammonia is called

Answer 14

Nitrogen fixation

Question 15

5 stages of nitrogen cycle

Answer 15

Nitrogen fixation, ammonification, nitrofication, assimilation, dentrification

Question 16

How do living organisms return carbon atoms to the atmosphere

Answer 16

Plants: dies and goes through decomposition
Animals: dies or respiration
Decomposers: decomposes things

Question 17

Releases carbon into atmosphere from fossil fuels

Answer 17

Combustion

Question 18

Climate

Answer 18

Average weather conditions over a long period of time

Question 19

Succession

Answer 19

Regular progression of of species replacement

Question 20

Photosynthesis respiration and combustion are parts of

Answer 20

Carbon cycle

Question 21

Animals eating plants is an important part of the

Answer 21

Phosphorus cycle

Question 22

Biome

Answer 22

Determined by climate and latitude

Question 23

Trophic levels

Answer 23

Level in a diagram based on an organism’s source of energy

Question 24

The most important abiotic factor for organisms in an ecosystem is

Answer 24

Water

Question 25

Animals that feed on plants are in the what trophic level

Answer 25

Second

Question 26

The movement of substances in a circular path between the nonliving environment and living organisms is called

Answer 26

Cycles of matter