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Ecosystem Energy and Soil Dynamics

Ecosystem Energy and Soil Dynamics

Assessment

Interactive Video

Biology

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial by Mr. Stano covers energy flow and matter recycling in ecosystems, focusing on trophic levels and energy loss. It explains the laws of thermodynamics and ecological efficiency, highlighting the 10% energy transfer rule. The tutorial also discusses gross and net primary productivity, emphasizing the role of photosynthesis. Additionally, it covers soil formation, soil horizons, and nutrient cycles, explaining how these factors contribute to ecosystem productivity.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary role of decomposers in an ecosystem?

To produce energy from sunlight

To recycle nutrients back into the ecosystem

To consume primary producers

To prevent energy loss as heat

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which law of thermodynamics explains the constant loss of energy as heat in an ecosystem?

First law of thermodynamics

Second law of thermodynamics

Law of energy creation

Law of conservation of mass

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a food web, what do the arrows represent?

The speed of energy transfer

The size of the organism

The amount of energy lost

The direction of energy flow

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What percentage of energy is typically transferred from one trophic level to the next?

50%

20%

10%

5%

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is gross primary productivity?

The total energy stored by producers minus respiration

The rate at which producers convert solar energy into chemical energy

The total biomass produced by consumers

The energy available to consumers after respiration

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ecosystem is known for having the highest net primary productivity?

Grasslands

Tropical rainforests

Deserts

Tundra

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main factor that affects soil formation?

The process of weathering

The presence of animals

The type of vegetation

The amount of sunlight

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