Duplicate of Grade 7 Interactions and Ecosystems

Question 1

Many forests burn and then regrow after, what term best describes this?

Accepted Answer

secondary succession

Question 2

A Food pyramid of grass, grasshoppers, robins and cats. Which will provide the least organisms?

Accepted Answer

cats

Question 3

What are four examples of natural resources?

Accepted Answer

oil, water, trees, minerals

Question 4

Whichof the following are examples of abiotic parts of an environment?

Accepted Answer

water and soil

Question 5

Algae, perch, and mosquito larvae can be found in a pond. Identify the producer(s).

Accepted Answer

algae

Question 6

Why can pollutants, such as PCBs, have long-term negative effects on an ecosystem?

Accepted Answer

They take a long time to break down to a non-damagingform

Question 7

How does the typical N. American ecological footprint compare to those of the rest of the world

Accepted Answer

The N. American is about 3X as much the rest of the world.

Question 8

Your teacher asks you which ofthe four basic needs provides you with nutrition and energy.

Accepted Answer

food

Question 9

Which one of the following statements about an organism's niche in a community is true?

Accepted Answer

One organism usually fills several niches

Question 10

Many of the plants that grow in Hawaii would not survive in Canada. Why?

Accepted Answer

appropriate habitat

Question 11

Plants use ____________________ to make food and release __________________ to the environment.

Accepted Answer

carbon dioxide, oxygen

Question 12

_________________looks at changes in populations of organisms or in organisms themselves

Accepted Answer

Biological monitoring

Question 13

Some species are at risk of no longer existing. This means that they could become_____________

Accepted Answer

extinct

Question 14

Families reduce the amount of garbage by composting. What other activity is like composting?

Accepted Answer

decomposing

Question 15

_________________means that resources are being replenished and that wastes are being absorbed.

Accepted Answer

Sustainability

Question 16

What are the four basic needs of living things as you decide how to care for your new pet?

Accepted Answer

food, habitat, air for gas exchange, water

Question 17

How will cutting down the rain forest affect the air quality?

Accepted Answer

There will be a decrease in the oxygen contentof the air.

Question 18

What type of food gathering has the greatest impact on our environment?

Accepted Answer

feedlots that produce cattle for meat

Question 19

Which of the following is true about cycles?

Accepted Answer

All of the above

Question 20

Dr's think antibiotics are given out too freely. What is the result of overuse of antibiotics?

Accepted Answer

Antibiotics are becoming ineffective against somediseases

Question 21

Which of the following is an example of a "want?"

Accepted Answer

a hot shower each day

Question 22

How did DDT affect peregrine falcons?

Accepted Answer

Eggshells became so fragile the chicks could not survive.

Question 23

Ecology comes from the Greek word with which of the following meanings?

Accepted Answer

Home

Question 24

_______________is the development of an ecosystem in an area that was initially bare.

Accepted Answer

Primary Succession

Question 25

To see changes occurring in an ecosystem, a scientist would want to engage in which activity?

Accepted Answer

Long-term monitoring

Question 26

What is a change from a liquid to a vapour called?

Accepted Answer

evaporation

Question 27

Clearing forested land for farming often results in a reduction of birds. Why might this occur?

Accepted Answer

A and B are both correct

Question 28

A(n) ______________represents the number of organisms involved in each level of a food chain

Accepted Answer

pyramid of numbers

Question 29

What is precipitation?

Accepted Answer

rain, sleet, snow, or hail

Question 30

___________________are harmful substances released by humans into the environment.

Accepted Answer

Pollutants

Question 31

We get electricity by controlling water flow with large dams. Which of the following is true?

Accepted Answer

It is an example of how humans use natural resources.

Question 32

What word describes a relationship between two organisms where both benefit from being together

Accepted Answer

mutualism

Question 33

Bacteria are killing the plants shown in the food web. Which of the following is true.

Accepted Answer

All the organisms would benegatively affected by this event.

Question 34

What is the effect of using car pools, taking quick showers, and buying locally grown produce?

Accepted Answer

reduces ecological footprint

Question 35

Climate, weather and temperature changes in an ecosystem may be tracked through what activity?

Accepted Answer

Environmental monitoring

Question 36

A species becomes _______________when only a small number of its members are living

Accepted Answer

endangered

Question 37

Without protection for natural habitats, Earth may lose _________________

Accepted Answer

all of the above

Question 38

Which "R" are you practicing when you pass used clothing on to another person?

Accepted Answer

re-use

Question 39

How can North Americans reduce their ecological footprint?

Accepted Answer

A and B are both correct.

Question 40

Tiana is monitoring changes in a forest over time. The forest is huge. What should Tiana do?

Accepted Answer

use a number of permanent plots that she can study

Question 41

Most communities use landfill sites. What are these sites?

Accepted Answer

places for disposing garbage

Question 42

Which is the most effective way to reduce your ecological footprint?

Accepted Answer

Ride a bicycle

Question 43

An orchid attached to a tree is commensalism, a symbiotic relationship. Commensalism means?

Accepted Answer

The orchid benefits, the tree neither benefits or is harmed.

Question 44

________occurs when harmful substances enter a food web and build up in higher-level consumers.

Accepted Answer

Bioaccumulation

Question 45

The pH of the Great Lakes is 8. If they were subjected to acid rain, what would to happen?

Accepted Answer

pH would decrease

Duplicate of Grade 7 Interactions and Ecosystems

Questions 45

Duplicate of Grade 7 Interactions and Ecosystems

Questions 45