Science Chapter 4: System Of Life

Front 1

a supply of something useful for survival

Back 1

resource

Front 2

a struggle between two or more organisms for the same resource

Back 2

competition

Front 3

a close relationship in which two or more organisms from different species live together

Back 3

symbiosis

Front 4

an organism that has a parasite living on it

Back 4

host

Front 5

the role of an organism in a habitat

Back 5

niche

Front 6

a system of several overlapping food chains

Back 6

food web

Front 7

the coloring or patterns that allow a species to blend in with its habitat

Back 7

camouflage

Front 8

resemblance of one species to another

Back 8

mimicry

Front 9

the movement of energy within a system

Back 9

energy flow

Front 10

a process in which nutrients and other resources are repeatedly transferred throughout an ecosystem

Back 10

natural cycle

Front 11

the introduction of poisons or garbage into an ecosystem

Back 11

pollution

Front 12

the removal of most or all trees from a forest

Back 12

deforestation

Front 13

the protection and restoration of species and natural resources in an ecosystem

Back 13

conservation

Front 14

What is a need?

Back 14

something that an organism requires for survival

Front 15

True or False

The biotic and abiotic factors in an organism's habitat provide the resources that it needs.

Back 15

True

Front 16

True or False

An organism can survive without being a part of a system.

Back 16

False

Front 17

True or False

An organism always benefits from the interactions with other organisms in its ecosystem.

Back 17

False

Front 18

True or False

Sometimes, an interaction with another organism will neither help nor hurt it, and other times, the interaction will result in the organism's death.

Back 18

True

Front 19

True or False

All organisms compete for their needs and resources.

Back 19

False

Front 20

What are ways that organisms get the resources that they need?

Back 20

1. they compete

2. they help each other

3. they eat other species in the community

4. by living on other kinds of organisms

Front 21

True or False

Part of an organism's niche is how it helps meet the needs of other organisms

Back 21

True

Front 22

True or False

Different organisms can share a habitat, but each organism has its own niche.

Back 22

True

Front 23

True or False

Food chains in and ecosystem overlap. Most animals are part of more than one food chain and eat more than one kind of food.

Back 23

True

Front 24

True or False

An ecosystem can thrive if the relationships in the food web are not in balance.

Back 24

False

Front 25

True or False

The role of each organism helps the system stay in balance.

Back 25

True

Front 26

True or False

In a food web, predators and prey are dependent on each other. If the predator couldn't catch the prey it would starve and if they prey would become too numerous. Then they would need more food and starve.

Back 26

True

Front 27

Name some some special defenses that certain species use to stay alive.

Back 27

1. running

2. staying alert

3. playing dead

4. spraying chemicals

5. camouflage

6. mimicry

Front 28

For an ecosystem to be balanced and continue to function, it must have _________

Back 28

Energy

Front 29

Explain the energy flow.

Back 29

1. The sun is the main source of energy

2. Producers absorb energy from the sunlight and nutrients from the air, water, and soil to produce their own form of energy

3. Consumers eat producers and use the producer's energy to live and grow

4. Some consumers eat other consumers and use their energy to live and grow

5. Decomposers use energy from the bodies of dead organisms

Front 30

True or False

Ecosystems are designed to cope with some imbalances and even to correct them.

Back 30

True

Front 31

What things can cause imbalances?

Back 31

natural disasters

human activity

Front 32

True or False

Invasion of a foreign species can disrupt the energy flow in a habitat by preventing the native species from obtaining food.

Back 32

True

Front 33

True or False

Energy flow becomes unstable when too many members of a species are killed or removed from their habitat.

Back 33

True

Front 34

What are things that cause severe imbalance in an ecosystem?

Back 34

1. the introduction of a foreign species

2. pollution

3. deforestation

Front 35

How can humans help habitats recover from damage?

Back 35

by getting involved in conservation (protecting and restoring ecosystems)