A drought causes most of the grass to die back. What would you expect to happen to the number of rabbits in the wood?

The number of rabbits would decrease because there is less food available.

The number of rabbits would increase because there is more space.

The number of rabbits would stay the same because drought does not affect them.

The number of rabbits would increase because they eat other animals.

The die-back of the grass would affect the number of voles in the wood by:

Decreasing the number of voles because they lose food and shelter.

Having no effect on the number of voles.

Increasing the number of voles because they have more space to move.

Causing the voles to become predators.

All food chains start with a plant or algae because:

they produce their own food through photosynthesis.

they are the top predators in the ecosystem.

they consume other animals for energy.

Biomass is defined as:

The total mass of living organisms in a given area.

The number of animal species in a region.

The amount of sunlight received by plants.

The volume of water in a habitat.

State the energy transformation that takes place during photosynthesis.

Light energy is converted to chemical energy.

Chemical energy is converted to light energy.

Heat energy is converted to electrical energy.

Mechanical energy is converted to heat energy.

In a food chain, why are there usually more producers than consumers?

Because producers must provide all the energy for themselves and the consumers.

Because producers are at the top of the food chain.

Because consumers reproduce faster than producers.

Because consumers need less energy than producers.

What is a pyramid of numbers?

A pyramid of numbers is a diagram that shows the number of organisms at each level of a food chain using different sized blocks.

A pyramid of numbers is a diagram that shows the population growth of a species over time.

A pyramid of numbers is a diagram that shows the energy flow between trophic levels in a food chain.

A pyramid of numbers is a diagram that shows the biomass at each level of a food chain.

Why does the pyramid of numbers for an oak tree food chain look different from the grass-rabbit-fox pyramid?

Because oak trees are very large organisms, so the producer in this food chain could be just one individual.

Because oak trees have more leaves than grass.

Because foxes eat more than rabbits.

Because the food chain with oak trees has more energy at the top.

What does a pyramid of biomass represent?

A pyramid of biomass represents the total mass of individuals at each level of a food chain.

A pyramid of biomass represents the number of species in an ecosystem.

A pyramid of biomass represents the energy flow between trophic levels.

A pyramid of biomass represents the height of trees in a forest.

Why is the block representing the biomass of the oaks much wider than the block representing the biomass of the aphids in the pyramid of biomass?

Because one oak tree may have a mass of several tonnes, while the mass of each aphid is only a tiny fraction of a gram, so the combined mass of all the aphids is much less than the mass of the tree they feed on.

Because aphids reproduce faster than oaks, so their biomass is always less.

Because oaks are at the top of the food chain, so they have more biomass.

Because aphids consume all the biomass of the oaks, leaving little for themselves.

A food chain must contain more producers than consumers because:

producers provide the energy needed for all other organisms

producers depend on consumers for food

consumers produce more energy than producers

consumers are always more numerous than producers

Food chains usually contain no more than four organisms because:

energy is lost at each trophic level, limiting the number of organisms

there are not enough species to form longer chains

organisms cannot survive in longer chains

predators always eliminate the last organism

Large carnivores such as lions are relatively rare in a food chain because:

Energy is lost at each trophic level, leaving less energy for higher-level carnivores.

They are at the bottom of the food chain.

They reproduce much faster than herbivores.

They have more food sources than herbivores.

The equation for calculating the efficiency of the energy transfer from one trophic level to the next is:

(Energy at higher trophic level / Energy at lower trophic level) × 100

(Energy at lower trophic level / Energy at higher trophic level) × 100

(Energy at higher trophic level + Energy at lower trophic level) × 100

(Energy at higher trophic level - Energy at lower trophic level) × 100

Rearing animals in heated sheds could help raise the yield of meat from animals because:

It reduces the energy animals use to keep warm, allowing more energy to be used for growth.

It makes animals eat less food, reducing costs.

It increases the amount of exercise animals get, making them healthier.

It causes animals to sleep more, which increases meat production.

Rearing animals in small pens so they cannot move about much could help raise the yield of meat from animals because:

Less energy is used for movement, so more energy is available for growth.

It increases the animals' appetite significantly.

Animals become healthier in small spaces.

It makes the animals more active and muscular.

Meat from intensively reared animals is generally cheaper than meat from traditionally reared animals because:

intensive rearing methods reduce production costs

intensive rearing uses more expensive feed

traditional rearing produces more meat per animal

intensive rearing requires more land

a square frame used to sample an area in ecological studies

a measuring instrument for temperature

a type of animal found in grasslands

a type of soil found in forests

To measure the abundance of a plant such as a daisy using a quadrat, you should:

Place the quadrat randomly on the ground and count the number of daisies within it.

Count all the daisies in the entire field without using the quadrat.

Use the quadrat to measure the height of the daisies only.

Place the quadrat only where you see the most daisies.

To ensure your quadrat is placed randomly, you should:

Use a random number generator to select coordinates for placement.

Choose locations that look most interesting.

Place the quadrat wherever it is easiest to access.

Always place the quadrat at the edge of the study area.

It is important to place your quadrat randomly because:

it ensures that the results are not biased.

it makes the experiment faster.

it guarantees that only rare species are counted.

it allows you to choose your favorite area.

The method used for the transect line to estimate the population size of daisies is:

Place a tape measure across the area and count daisies at regular intervals along the line.

Count all daisies in the entire field without any pattern.

Estimate the number of daisies by looking at the area from a distance.

Only count daisies found at the start and end of the transect line.

CLS Ecosystems - Key Concepts

Authored by Kerry Pattison

Biology

9th Grade

Used 1+ times

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

50 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain how quadrats can be used to estimate the population size of an organism in two different areas.

Quadrats are placed randomly in each area, the number of organisms in each quadrat is counted, and the average is calculated. This average is then multiplied by the total area to estimate the population size in each area.

Quadrats are placed only in the area with the most organisms, and the total number found is used as the estimate for both areas.

Quadrats are used to trap organisms, and the number of trapped organisms is doubled to estimate the population size in each area.

Quadrats are placed in a line along the edge of each area, and only the organisms touching the quadrat edges are counted for the estimate.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the transfer of substances and of energy along a food chain.

Energy and substances are transferred only through the air and not by eating.

Energy and substances are transferred from one organism to another when one organism eats another. Only a small percentage of energy is passed on at each trophic level; the rest is lost as heat, waste, or used for life processes.

All energy is passed on completely from one organism to the next without any loss.

Substances and energy are only transferred at the producer level and do not move up the food chain.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is only about 10% of energy transferred from one trophic level to the next?

Because energy is only needed by producers, not by consumers.

Because energy is created at each trophic level and accumulates.

Because all organisms at each level store all the energy they consume.

Because most energy is lost as heat, waste, or used for life processes such as movement and respiration.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define the following term: Animals that eat other plants or animals.

Producers

Consumers

Decomposers

Herbivores

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define the following term: Organisms which decay dead material and help recycle nutrients.

Decomposers

Producers

Consumers

Predators

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define the following term: A self-supporting system of organisms interacting with each other and with a physical environment.

Ecosystem

Habitat

Population

Community

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All the non-living or non-biological components of an ecosystem i.e. physical factors such as soil, moisture, range of temperature, and availability of light.

Producers

Biotic factors

Abiotic factors

Consumers

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

50 questions

HBio Ecology

Quiz

•

9th - 12th Grade

55 questions

Cytology

Quiz

•

KG - University

45 questions

Evolution Test

Quiz

•

9th Grade

50 questions

Cells, Classification & Ecosystems

Quiz

•

KG - University

55 questions

DNA Replication and Protein Synthesis

Quiz

•

8th - 10th Grade

46 questions

Muscles of Upper Limb

Quiz

•

9th Grade - University

45 questions

Biology End of Course Review Guide Pg. 1 & 2

Quiz

•

9th - 12th Grade

50 questions

Nucleic Acids & DNA Replication

Quiz

•

9th - 12th Grade

Popular Resources on Wayground

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

29 questions

Alg. 1 Section 5.1 Coordinate Plane

Quiz

•

9th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

11 questions

FOREST Effective communication

Lesson

•

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

Discover more resources for Biology

22 questions

Human Body Systems Overview

Quiz

•

9th Grade

25 questions

photosynthesis and cellular respiration

Quiz

•

9th Grade

12 questions

Check Mitosis Vs. Meiosis

Quiz

•

9th Grade

15 questions

DNA Structure and Replication

Quiz

•

9th Grade

21 questions

Cell Cycle and mitosis

Quiz

•

9th - 10th Grade

18 questions

Enzymes and Their Functions Quiz

Quiz

•

9th Grade

20 questions

Food Chains and Food Webs

Quiz

•

7th - 12th Grade

10 questions

Exploring Food Webs and Energy Pyramids

Interactive video

•

6th - 10th Grade

CLS Ecosystems - Key Concepts

Explain how quadrats can be used to estimate the population size of an organism in two different areas.

Explain the transfer of substances and of energy along a food chain.

Why is only about 10% of energy transferred from one trophic level to the next?

Define the following term: Animals that eat other plants or animals.

Define the following term: Organisms which decay dead material and help recycle nutrients.

Define the following term: A self-supporting system of organisms interacting with each other and with a physical environment.

All the non-living or non-biological components of an ecosystem i.e. physical factors such as soil, moisture, range of temperature, and availability of light.

The ecological area that is inhabited by a particular organism. It is made up of the environment (physical factors) as well as living factors such as the availability of food and the presence of predators.

All individuals of a particular species found in an ecosystem at any one time.

All individuals of all species found in an ecosystem at any one time.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Biology