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WorksheetsGrade 7 - Unit 1 – Interactions & Ecosystems Concepts
Total questions: 17
Worksheet time: 21mins
What are the basic needs of living things?
Food, water, air, and shelter
Entertainment and luxury
Internet and social media
Money and power
Which of the following is a biotic component of an ecosystem?
Water
Rocks
Species
Air
What is the term for the relationship where one organism benefits and the other is not affected?
The term is commensalism.
The term is parasitism.
The term is mutualism.
The term is predation.
What is the process by which plants produce food using sunlight?
Photosynthesis
Respiration
Transpiration
Fermentation
The role of decomposers in an ecosystem is to:
Produce energy through photosynthesis
Break down dead organisms and recycle nutrients
Compete with primary producers for sunlight
Provide shelter for small animals
What is the difference between primary and secondary succession?
Primary succession occurs in lifeless areas, while secondary succession occurs in areas where life has previously existed.
Primary succession occurs in areas with existing soil, while secondary succession starts on bare rock.
Primary succession is faster than secondary succession.
Primary succession involves only plants, while secondary succession involves animals.
What is the term for the variety of living things within an ecosystem?
Biodiversity
Ecosystem
Habitat
Population
Which of the following are intervention programs aimed at preserving biodiversity?
Habitat restoration
Pollution increase
Deforestation
Species extinction
According to the graph, what is causing the deer population to decrease
They got sick
The wolf population is decreasing
The wolf population increased
They ran out of food
What is the role of producers in an ecosystem?
To consume other organisms for energy
To produce energy through photosynthesis
To decompose organic matter
To provide shelter for animals
If there is 2000 kcal (units) of energy at the producer level in this particular ecosystem, how many kcal of energy will be available for hawk?
2000 kcal
200 kcal
20 kcal
2 kcal
0.2 kcal
Which of the following is an abiotic factor in an ecosystem?
Plants
Animals
Sunlight
Fungi
What is the term for the process by which water vapor turns into liquid water?
Evaporation
Condensation
Precipitation
Transpiration
What is the primary source of energy for the Earth's climate system?
Geothermal energy
Wind energy
Solar energy
Nuclear energy
What two criteria must be true, in order for organisms to be classified as a species? Tigers and Lions belong to the same Genus, but they do not belong to the same Species. Why?
Charles Darwin is considered history's most famous biologist. "Survival of the fittest" is a phrase that describes the idea that organisms best suited to their environment are more likely to survive and reproduce. Briefly explain how this phrase relates to any ONE species of your choice.
In our classroom discussion, we debated the use of DDT. List a Positive and Negative impact of DDT.
