unit 2 by jade

Question 1

true or false
Human activity can never have a negative affect on an ecosystem

Answer 1

false

Question 2

Decomposers are important for cycling nutrients back into an ecosystem

Answer 2

true

Question 3

What humans dump into the sewer system does not impact aquatic ecosystems

Answer 3

false

Question 4

Frogs are not important, environmental indicators

Answer 4

false

Question 5

Introduced species greatly impact native ecosystems

Answer 5

true

Question 6

Multiple choice and interacting system consisting of biotic and abiotic components is called

Answer 6

an ecosystem

Question 7

A group of ducks, composed of members of one species would be considered

Answer 7

a population

Question 8

A group of organisms that could be found in and around a pond would be considered

Answer 8

a community

Question 9

The following statement is not true about producers

Answer 9

Producers, eat other producers

Question 10

Organisms that break down, waste from other living and dead organisms to get nutrients for their own use are called

Answer 10

Decomposers

Question 11

Frogs in other amphibians are exposed to different environmental toxins in different ecosystems.

Answer 11

2

Question 12

Which of the following factors listed is abiotic

Answer 12

air

Question 13

The way which plants convert in store energy from the sun is called

Answer 13

Photosynthesis

Question 14

Which statement regarding energy transfer in a food chain is true.

Question 15

The products (ending materials) in photosynthesis are

Answer 15

Oxygen and sugar

Question 16

Atmospheric carbon dioxide is used by

Answer 16

Plants during photosynthesis

Question 17

In a typical food chain plants would be first found at the

Answer 17

first level

Question 18

Species that cannot be found anywhere on earth is said to be

Answer 18

Extinct

Question 19

omnivores can be considered both

Answer 19

Producers and secondary consumers

Question 20

Burning fossil fuels negatively impacts ecosystems by

Answer 20

Contributing to global warming over exploding the resource

Question 21

matching
Organisms which manufacture their own food from the abiotic environment

Answer 21

producers

Question 22

The study of the relationship between living and nonliving parts of the ecosystem

Answer 22

Ecology

Question 23

rain, air and temperature are an example of factors in an environment

Answer 23

abiotic

Question 24

the role an organism lays in an ecosystem

Answer 24

niche

Question 25

organisms which feed on dead organisms

Answer 25

Scavengers

Question 26

Organisms that break down dead organisms to recycle the nutrients back into an ecosystem

Answer 26

Decomposers

Question 27

Several food chains linked together

Answer 27

food web

Question 28

The environmental space in which an organism lives

Answer 28

habitat

Question 29

plants, animals and bacteria would all be factors within an ecosystem

Answer 29

botic

Question 30

Term used to describe the number of different plant and animal species with in an ecosystem

Answer 30

Biodiversity

Question 31

List three human activities that have negatively impacted biodiversity in an ecosystems

Answer 31

Three ways human activities of negatively impacted biodiversity in ecosystems are polluting, hunting, and overfishing

Question 32

Pesticides are used to kill pest species like mosquitoes. What could happen to an ecosystem, if all of the mosquitoes were killed by pesticides

Answer 32

The ecosystem we’re not doing too well in plant growth because that’s what it would affect because mosquitoes are pollinators.

Question 33

How do you think humans can control mosquitoes without using pesticides?

Answer 33

I think one way humans can control mosquitoes without pesticides, are planting certain flowers that they dislike, like lavender or rosemary. If you do that, they won’t bother you anymore because they don’t like those plants.

Question 34

List two predator – prey, relationships, that you might find in an arctic ecosystem.

Answer 34

1. polar bears-ringede seals
2. arctic fox-lemmings

Question 35

Using the terminologies, you’ve learned in class explain how producers are related to consumers in a food chain. Give an example of a producer and a consumer

Answer 35

Producers are related to consumers in a food chain because producers provide food for the consumers. An example of a producer is grass and an example of a consumer is rabbit.

Question 36

Create a food chain from the list of animals provided. Label each as either producer, secondary, consumer, primary, consumer, territory, consumer.
grass
Scorpion
Cricket
meer cat

Question 37

Calculate the growth of a herd of grade 9 students in the halls of Paul Dwyer for one year if that year 20 young wings were born 15 students immigrated from Maxwell five died from old age and 10 students left a wire to live at the depot.

Answer 37

Population growth:

Question 38

What is the chemical equation for photo synthesis?

Answer 38

6CO2 + 6H2O → C6H12O6 + 6O2.

Question 39

What is the chemical equation for cellular respiration?

Answer 39

C 6 H 12 O 6 + 6 O 2 –> 6 CO 2 + 6 H 2 O + ATP

Question 40

What does nitro fixing bacteria convert into?

Answer 40

It converts n2 into ammonia

Question 41

What does nitrifying bacteria convert into?

Answer 41

It converts ammonia into nitrates

Question 42

What does denitrifying bacteria convert into?

Answer 42

it coverts nitrates into n2