Understanding Ecosystems and Biodiversity

Why is biodiversity important during a drought in a forest ecosystem?

• It causes more species to die quickly.

• It helps some species survive and maintain ecosystem functions.

• It reduces the number of animals in the forest.

• It makes the forest more vulnerable to drought.

Which of the following is an example of a biotic component in an ecosystem?

• Soil

• Water

• Sunlight

• Trees

What does an ecosystem include?

• Only living things

• Biotic and abiotic components working together

• Only plants and animals

• Only water and soil

Which of the following best shows how biotic and abiotic parts of an ecosystem interact?

• Animals sleep during the day.

• Sunlight shines on rocks.

• Wind blows through empty land.

• Rainfall helps plants grow, which feed herbivores.

What is one negative effect of cutting down trees in a forest?

• It creates more shade.

• It improves air quality.

• It increases biodiversity.

• It destroys animal habitats.

How can deforestation affect the water cycle?

• It increases rainfall.

• It reduces evaporation and transpiration.

• It causes more clouds to form.

• It improves water quality.

Which of the following is a benefit of having many different species in an ecosystem?

• It increases competition and extinction.

• It makes the ecosystem more fragile.

• It helps the ecosystem stay balanced and resilient.

• It reduces the number of producers.

What is the role of abiotic factors in an ecosystem?

• They are predators of biotic components.

• They provide non-living support like sunlight, water, and soil.

• They reproduce and grow.

• They compete with animals for food.

Which of the following is a reason why ecosystems are important to people?

• They are not connected to human life.

• They are used only for tourism.

• They only provide homes for animals.

• They help regulate climate and provide resources like food and water.

What might happen if too many trees are removed from a forest ecosystem?

• The ecosystem will become more stable.

• Animal populations will increase.

• Rainfall will increase.

• Soil erosion may occur and biodiversity may decrease.