How does energy enter most ecosystems?

Through sunlight captured by producers

Through consumers recycling nutrients

What is the result of the process of chemosynthesis?

Conversion of inorganic molecules to food

Conversion of minerals to vitamins

Decomposition of organic matter

What is Gross Primary Productivity?

Total energy captured by producers via photosynthesis

Rate of respiration by consumers

Net productivity in an ecosystem after respiration

What is a 'limiting nutrient' in an ecosystem?

A nutrient that restricts growth due to its scarcity

An unused nutrient in the cycle

What does Net Primary Productivity represent in an ecosystem?

Chemical energy available to consumers after respiration

Energy lost as heat in energy transfer

Tertiary consumers are rare in ecosystems because...

not much energy is available at that level.

biodiversity makes upper trophic levels rare.

animals get larger and larger as you go up trophic levels, limiting numbers at upper levels.

excess predation in the ecosystem

A student has set up an artificial ecosystem for a class project. This ecosystem has producers, first-level consumers, second-level consumers, and third-level consumers. By accident, a chemical enters the ecosystem and kills all of the first-level consumers. Which group(s) of organisms will most likely survive?

second-level and third-level consumers

third-level consumers and producers

Which of the following is TRUE about energy in ecosystems on planet Earth?

The energy for all living things in an ecosystem originates from the sun and transitions through ecosystems to reach every organism

Energy for all living things in a natural ecosystem is generated by hydroelectric dams, wind turbines, solar panels, or ethanol power plants

The energy for all living things starts with producers in an ecosystem which create all energy for all life in every ecosystem

All energy in ecosystems on Earth and in the universe is infinite, it will last forever and always be available for living things

Decomposers play a key role in ecosystems by:

Breaking down organic matter and returning nutrients to the ecosystem

Storing energy from the sun in chemical compounds

Increasing the trophic level of primary consumers

Why are cycles, such as the carbon cycle essential to the sustainability of ecosystems?

maintaining balanced levels of carbon is necessary for life to continue on earth

carbon doesn't need to stay in one place all the time

some cycles are necessary for life, but others are not as important

there isn't enough carbon to go around, so it has to be recycled

A food web is more realistic than a food chain for showing the feeding relationships in ecosystems because

producers are usually eaten by many different consumers and most consumers are eaten by more than one predator

it compares the number of consumers to the number of micro-organisms in an ecosystem

a food web explains why there are more producers than consumers

Ecological pyramids are a good model to use to show the relationships between trophic levels in an ecosystem because

B) it shows that the lower levels are needed to support the higher levels

C) it shows that the higher levels do not need any support from the lower levels

D) it shows that the higher levels are bigger than the lower levels

According to the pyramid, which direction does energy flow?

From the producers to the top consumers

From the top consumers to the bottom producers

From primary consumers to producers

A primary consumer ....

eat a wide-variety of plants and animals

How does an increase in predator population affect the prey population?

Has no effect on the prey population

Causes the prey population to remain stable

How is matter cycled within an ecosystem?

It is recycled through decomposition and nutrient cycling

It cycles through the food web and is eventually lost as heat

It is continuously added from external sources

Which factor is most likely to cause a shift from a stable ecosystem to a new ecosystem?

Introduction of a non-native species

In an ecosystem, how do herbivores help maintain stability?

By keeping the population of producers in check

By increasing the number of producers

By providing nutrients to decomposers

By controlling the predator population

Unit 3 Ecosystems

Quiz

•

Science

•

10th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-LS2-3, MS-LS1-6, MS-LS2-4

+5

Standards-aligned

Samantha Liley

Used 3+ times

FREE Resource

38 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the ultimate source of energy for life on Earth?

Sunlight

Wind

Water

Geothermal heat

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do autotrophs obtain energy?

Eating other organisms

Breaking down dead matter

Using sunlight to convert inorganic substances into organic ones

Consuming nutrients from soil

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a food web, what generally links all food chains together in an ecosystem?

Predators

Decomposers

Herbivores

Complex interactions

Tags

NGSS.MS-LS2-3

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What term describes the movement of water from plants to the atmosphere?

Evaporation

Transpiration

Condensation

Precipitation

Tags

NGSS.MS-ESS2-4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following organisms are primary producers in aquatic ecosystems?

Fish

Herbivores

Detritivores

Algae

Tags

NGSS.MS-LS2-3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the energy transfer between trophic levels typically low?

A. Energy is lost as heat

B. Organisms are consumed whole

C. Energy is fully utilized at each level

D. All energy is transferred

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which biogeochemical cycle does not involve the atmosphere?

Carbon cycle

Phosphorus cycle

Nitrogen cycle

Water cycle

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Unit 3 Ecosystems

38 questions

What is the ultimate source of energy for life on Earth?

How do autotrophs obtain energy?

In a food web, what generally links all food chains together in an ecosystem?

What term describes the movement of water from plants to the atmosphere?

Which of the following organisms are primary producers in aquatic ecosystems?

Why is the energy transfer between trophic levels typically low?

Which biogeochemical cycle does not involve the atmosphere?

In a food chain, what term describes the organism that consumes the primary consumers?

What is the role of decomposers in an ecosystem?

How does energy enter most ecosystems?

Access all questions and much more by creating a free account

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