PhD Science Module 2

Some changes that can disrupt the balance of an ecosystem are:

• fires burning during vegetation

• people cutting down forests to build neighborhoods

• droughts taking away the source of water

• all of the above

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What are food webs?

• They are made up of many food chains joined together and interconnected.

• They are only plants

• They are only animals

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What does this picture represent?

• Animals

• Plants

• A food chain

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Invasive palnts that do not have competitors in their habitats can cause change by...

• growing so large they block the sunlight

• absorbing more water than other plants

• providing food for animals

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The variety of different life forms in an ecosystem.

• biomes

• deciduous forest

• biodiversity

• grassland

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Human activities that affect ecosystems can be...

• Factories, industries, air contamination

• Rain, wind, floods, tornadoes, hurricanes…

• Pollution, overfishing, forest fires, deforestation

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Which of the following are factors that could cause extinction?

• Destruction of animals' habitat

• Climate change

• Pollution

• Increased human population (more people)

• ALL of the above could cause extinction

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Plants use energy from ______ to make food.

• stars

• moon

• planets

• sunlight

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Where does the food chain START?

• with consumers that eat grass

• with the sun giving energy to producers

• with the sun giving energy to consumers

• with consumers eating other consumers

__________ play the role of producers.

• animals

• sunlight

• plants

• energy

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