Exploring Food Chains and Webs

The video tutorial covers the concepts of food chains and food webs, explaining how energy moves through an ecosystem. It discusses different types of consumers, such as herbivores, carnivores, omnivores, and decomposers, and introduces trophic levels. The tutorial also explores energy pyramids, biomass, and the pyramid of numbers, highlighting how energy is transferred and lost at each level.

What do herbivores primarily consume?

• Dead organic matter

• Both plants and animals

• Meat

• Plants

Which type of consumer eats both plants and animals?

• Carnivore

• Detritivore

• Herbivore

• Omnivore

What defines a food chain in an ecosystem?

• None of the above

• Random feeding relationships

• Complex network of energy flow

• Linear sequence of who eats whom

Tags

NGSS.MS-LS2-3

Which type of organism is known to consume only one specific type of food?

• Generalist

• Omnivore

• Decomposer

• Specialist

At which trophic level are humans listed when they consume plants?

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Producers

What is a food web?

• A graphical representation of energy loss

• A complex network illustrating multiple feeding relationships

• A linear sequence of energy transfer

• A model showing only primary consumers

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

How much energy is transferred to the next trophic level in an ecosystem?

• 50%

• 90%

• 10%

• 25%

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What does a biomass pyramid represent?

• The water content of organisms

• The dry mass of organisms in a given area

• The energy content at each trophic level

• The number of organisms at each trophic level

Which pyramid shows the actual number of organisms at each trophic level?

• Pyramid of energy

• Pyramid of biomass

• Pyramid of species

• Pyramid of numbers

What percentage of energy is typically lost as heat between trophic levels?

• 90%

• 10%

• 20%

• 80%

Tags

NGSS.MS-LS2-3