Ecosystem Interactions and Cycles

The video tutorial by Miss Vital covers Chapter 3 on the biosphere, focusing on ecology, the study of interactions between organisms and their environment. It explains the levels of organization in ecosystems, from individual organisms to the global biosphere. The tutorial discusses biotic and abiotic factors, energy flow through autotrophs and heterotrophs, and the concept of trophic levels. It also covers ecological pyramids, including biomass and energy pyramids, and details biogeochemical cycles such as the water, carbon, nitrogen, and phosphorus cycles.

What is the study of interactions between organisms and their environment called?

• Biology

• Ecology

• Geology

• Zoology

Which of the following is a non-living factor in an ecosystem?

• Animals

• Plants

• Bacteria

• Sunlight

What type of organism makes its own food through photosynthesis?

• Omnivores

• Autotrophs

• Carnivores

• Herbivores

Which of the following is an example of a decomposer?

• Vulture

• Earthworm

• Lion

• Crow

What is a food web?

• A single food chain

• A network of interconnecting food chains

• A pyramid of biomass

• A type of autotroph

In an energy pyramid, how much energy is typically transferred to the next trophic level?

• 50%

• 20%

• 10%

• 5%

What process in the water cycle involves water vapor turning into clouds?

• Condensation

• Transpiration

• Evaporation

• Precipitation

Which process in the carbon cycle involves plants using CO2 to make organic compounds?

• Respiration

• Photosynthesis

• Combustion

• Decomposition

What form of nitrogen can plants directly use?

• Nitrates

• Ammonia

• Nitrogen gas

• Nitrites

How is phosphorus returned to the soil in the phosphorus cycle?

• Through photosynthesis

• By weathering of rocks

• By nitrogen fixation

• Through combustion