Ecosystem/Biology

Question 1

Q1: What is an ecosystem?

Answer 1

A1: A system where living (biotic) and non-living (abiotic) things interact.

Question 2

Q2: What are abiotic factors?

Answer 2

A2: Non-living parts like sunlight, water, air, and soil.

Question 3

Q3: What are biotic factors?

Answer 3

A3: Living parts like plants, animals, and microorganisms.

Question 4

Q4: What is a population?

Answer 4

A4: A group of the same species living in one area.

Question 5

Q5: What is a community?

Answer 5

A5: Different populations living together in one area.

Question 6

Q6: What is the biosphere?

Answer 6

A6: The global sum of all ecosystems where life exists.

Question 7

Q7: What happened to Easter Island’s ecosystem?

Answer 7

A7: Overuse of resources caused deforestation, soil erosion, and social collapse.

Question 8

Q8: Name the four spheres of Earth.

Answer 8

A8: Atmosphere (air), lithosphere (land), hydrosphere (water), and biosphere (life).

Question 9

Q9: How do the spheres interact?

Answer 9

A9: Example: A tree (biosphere) grows in soil (lithosphere), uses water (hydrosphere), and needs air (atmosphere).

Question 10

Q10: What are sustainable activities?

Answer 10

A10: Actions that conserve resources, like recycling or using renewable energy.

Question 11

Q11: What are unsustainable activities?

Answer 11

A11: Actions that harm ecosystems, like deforestation or overfishing.

Question 12

Q12: What is Traditional Ecological Knowledge (TEK)?

Answer 12

A12: Indigenous knowledge about caring for the environment.

Question 13

Q13: How is TEK different from Scientific Ecological Knowledge (SEK)?

Answer 13

A13: TEK is based on tradition and observation; SEK is based on experiments and data.

Question 14

Q14: What is a natural ecosystem?

Answer 14

A14: A balanced environment, like a forest or lake, that works without human help.

Question 15

Q15: What is an artificial ecosystem?

Answer 15

A15: A human-managed system, like a farm or garden.

Question 16

Q16: What are producers?

Answer 16

A16: Plants that make their own food using sunlight.

Question 17

Q17: What are consumers?

Answer 17

A17: Animals that eat plants or other animals for energy.

Question 18

Q18: What are decomposers?

Answer 18

A18: Organisms like fungi and bacteria that break down dead matter.

Question 19

Q19: What is a trophic level?

Answer 19

A19: A step in a food chain, like producers or primary consumers.

Question 20

Q20: How much energy is passed between trophic levels?

Answer 20

A20: Only 10%, the rest is lost as heat.

Question 21

Q21: What is a food web?

Answer 21

A21: A diagram showing how organisms in an ecosystem are connected through feeding.

Question 22

Q22: What happens if one species disappears in a food web?

Answer 22

A22: It can disrupt the balance and harm other species.

Question 23

Q23: What is photosynthesis?

Answer 23

A23: Plants use sunlight, water, and CO₂ to make food and oxygen.

Question 24

Q24: What is cellular respiration?

Answer 24

A24: Living things break down food and oxygen to release energy.

Question 25

Q25: What is the water cycle?

Answer 25

A25: The movement of water through evaporation, condensation, and precipitation.

Question 26

Q26: What is the carbon cycle?

Answer 26

A26: The movement of carbon through the air, living things, and the Earth.

Question 27

Q27: What is biomagnification?

Answer 27

A27: The buildup of harmful chemicals as they move up the food chain.

Question 28

Q28: What causes climate change?

Answer 28

A28: Excess CO₂ from human activities like burning fossil fuels.

Question 29

Q29: What are the effects of climate change?

Answer 29

A29: Global warming, rising sea levels, and extreme weather.

Question 30

Q30: Why is nitrogen important?

Answer 30

A30: It helps plants and animals grow by making proteins and DNA.

Question 31

Q31: What is nitrogen fixation?

Answer 31

A31: Converting nitrogen gas into a form plants can use.

Question 32

Q32: How do humans impact the nitrogen cycle?

Answer 32

A32: Using fertilizers and burning fossil fuels add too much nitrogen to the environment.

Question 33

Q33: What factors harm ecosystems?

Answer 33

A33: Pollution, deforestation, and overfishing.

Question 34

Q34: How can we make ecosystems more sustainable?

Answer 34

A34: Conserve resources, restore habitats, and reduce waste.