Exploring Food Webs and Energy Pyramids

The video tutorial covers the concepts of food webs and energy pyramids, starting with a detailed explanation of photosynthesis and its components. It then moves on to define ecosystems, highlighting the difference between biotic and abiotic factors, and introduces autotrophs and heterotrophs. The tutorial further explains the types of consumers, including herbivores, carnivores, omnivores, scavengers, and decomposers. It discusses the structure of food chains and food webs, emphasizing energy transfer. Finally, the video explains energy pyramids, detailing trophic levels and the flow of energy through an ecosystem.

What are the main components required for photosynthesis?

• Oxygen, water, and sunlight

• Carbon dioxide, water, and sunlight

• Glucose, oxygen, and sunlight

• Carbon dioxide, glucose, and water

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What is the chemical energy produced during photosynthesis?

• Oxygen

• Carbon dioxide

• Glucose

• Water

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NGSS.MS-LS1-6

What defines an ecosystem?

• Only the plants in an area

• All the living and non-living things in an area

• Only the non-living things in an area

• Only the living things in an area

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NGSS.MS-LS2-3

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Which of the following is an abiotic factor?

• Rocks

• Bacteria

• Animals

• Plants

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NGSS.MS-LS2-3

What type of consumer eats only plants?

• Carnivores

• Herbivores

• Scavengers

• Omnivores

In a food chain, what do the arrows represent?

• The direction of energy transfer

• The direction of nutrient flow

• The direction of water flow

• The direction of sunlight

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NGSS.MS-LS1-6

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What is a food web?

• A single pathway of energy transfer

• A network of interconnected food chains

• A diagram showing only consumers

• A diagram showing only producers

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Which organism in a food web is responsible for breaking down dead material?

• Decomposer

• Producer

• Consumer

• Omnivore

What is the primary source of energy for producers in an energy pyramid?

• Nutrients

• Sunlight

• Soil

• Water

Tags

NGSS.MS-LS1-6

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Why is there less energy available at higher trophic levels in an energy pyramid?

• Energy is absorbed by the sun

• Energy is converted to water

• Energy is stored in the soil

• Energy is lost as heat

Tags

NGSS.MS-LS1-6

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