Webs of Life - Chapters 8 and 9

What is the main difference between a strong food web and a weak food web?

• A strong food web can recover from the loss of one species, while a weak web may fall apart quickly if just one link is lost.

• A strong food web has fewer species.

• A weak food web can recover from drought easily.

• A strong food web does not move energy through ecosystems.

Fill in the blank: Biodiversity is the variety of _______ in a habitat.

• living things

• rocks

• weather patterns

• water sources

According to the passage, what helps keep an ecosystem stable if one species disappears?

• Flexibility in food sources and having more species (biodiversity) helps keep the system stable.

• Only having one food source for all species helps keep the system stable.

• Removing all predators from the ecosystem helps keep the system stable.

• Decreasing the number of species in the ecosystem helps keep the system stable.

What happens in a strong web if one plant disappears?

• The web falls apart quickly.

• Herbivores can feed on other plants.

• All animals vanish.

• Predators lose all food sources.

What is the relationship between the number of species in an ecosystem and the stability of the food web?

• More species mean more connections and more stability.

• Fewer species mean more stability.

• The number of species does not affect stability.

• More species mean less energy movement.

According to the passage 'Webs With Variety,' what gives the system strength in an Australian woodland food web?

• Having only one type of crop

• Many paths for energy to flow

• Fewer links in the web

• Only birds and insects

Fill in the blank: In woodlands, many plants and animals connect in a strong food web. More variety means better chances of ________ challenges.

• surviving

• ignoring

• creating

• avoiding

What does the word 'strike' mean as used in the passage?

• To hit something

• To happen suddenly or unexpectedly

• To refuse to work

• To make a deal

A woodland is more likely to survive challenges than a farm field with only one type of crop because:

• it has a greater variety of plants and animals.

• it receives more sunlight.

• it is watered more often.

• it is protected from all pests.

What does the word 'handling' mean as used in the passage?

• To eat a wide range of food

• To deal with something in a good way

• To disappear from a habitat

• To lay eggs in ponds