5/24 - BLITZ - 8.11A Ecosystems

5/24 - BLITZ - 8.11A Ecosystems

Biotic Factors

• Living things such as...

• Plants

• People

• Animals

• Bacteria

• Dead plants, animals, rotting logs

Abiotic Factors

• Nonliving things such as...

• rocks

• soil

• sunlight

• water

• air

Multiple Choice

What is the definition of Biotic factors?

• nonliving factors

• tools

• living or once living factors

• soil

Multiple Choice

What is the definition of Abiotic factors?

• nonliving factors

• tools

• living or once living factors

• soil

Primary Consumers

Herbivores - only eat plants

Autotrophs - make their own food

Secondary Consumers

Eat the primary consumers

Omnivores - eat plants and animals

Carnivores - only eat meat

Hetertrophs - eat other organisms for food

Tertiary Consumers

Eats secondary consumers

Carnivores - only eat meat

Heterotrophs - eat other organisms for foot

Decomposers

Break down dead organisms:

- Bacteria

- Worms

- Fungi (Mushrooms)

Multiple Choice

An organism that lives by breaking apart dead organic matter into simpler parts is...

• scavenger

• consumer

• decomposer

• carnivore

Multiple Choice

In the food web shown, the snail would be considered...

• primary consumer

• secondary consumer

• tertiary consumer

• producer

Multiple Choice

How many carnivores are shown in this food web?

• 6

• 4

• 5

• 3

Multiple Choice

The shrew provides energy for the _______?

• cricket

• grasshopper

• frog

• snake

Multiple Choice

Which two organisms are in a PRODUCER-CONSUMER relationship?

• Gray Wolf and Fruits

• Vole and Grass

• Elk and Coyote

• Elk and Gray Wolf

Multiple Choice

Which two organisms are in a PREDATOR-PREY relationship?

• Grass and Vole

• Gray wolf and Elk

• Vole and Elk

• Gray Wolf and Fruits

Multiple Choice

Whitetip reef sharks spend most of the day lying on the ocean floor. While remaining sill, these sharks pump water across their gills.

The movement of water across their gills is necessary for -

• staying cool

• accessing food

• obtaining oxygen

• avoiding predators

Multiple Choice

Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete with plants growing nearby?

• By attracting herbivores to other plants

• By suppressing the growth of the other plants

• By increasing the photosynthesis rate of other plants

• By limiting the amount of water available to other plats

Multiple Choice

Which organisms in the food web shown compete for the same food source in this environment?

• Grasshoppers and Snakes

• Hawks and Frogs

• Frogs and Snakes

• Decomposers and Grasses

Multiple Choice

Which abiotic factor is phytoplankton most likely to compete for in a marine environment?

• Sunlight

• Fish

• Rocks

Multiple Choice

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

Multiple Choice

This graph shows ....

• When one population inceases, the other decreases.

• When one population decreases, the other inceases.

• When one population increases, the other increases instantly.

• When one population increases, the other increases shortly after.

Multiple Choice

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.