Ecosystems Quiz

A student is trying to model an ocean environment. What is the most important factor the student should add to the aquarium in order to make sure that the model is accurate?

• salt water
• sea stars

• seaweed

• coral reef

A farmer plants corn in a field every year for several years. Each year he notices that his production of corn per acre has decreased even though the weather conditions have been very similar. A change in which abiotic f

• decrease in soil nutrients

• decrease in sunlight

• increase in wind speed

• increase in precipitation

A species of mouse spends the day sleeping in its burrow to avoid high daytime temperatures. It is processing what little water it needs from the seeds it collects. To which environment is this mouse best adapted?

• desert

• rainforest

• marines

• tundra

Jazmine was studying different ecosystems. She compared the number of plants living in a forest to those in a desert. Which factor best explains why more plants may survive in a forest?

• There is more competition in the forest

• There is more sunlight in the forest

• There is more oxygen in the forest

• There is mor rain n the forest

Which are two abiotic factors that affect the survival of the aquatic organisms?

• dragonfly

• trout

• sand

• frog

Based on this picture, which is a biotic factor?

• the tree
• the water

• sunlight

• clouds

Which of the following is an abiotic factor in a river system?

• Trout

• Dragonfly

• Sand

• Frog

A spring-fed stream forms a pond that contains watercress plants, minnows, and crayfish. The pond receives 5 hours of direct sunlight every day. Which of the following is an abiotic factor in this ecosystem?

• the pond water

• the watercress plants

• the minnows

• the crayfish

in the geologic past, abiotic factors such as volcanic eruptions have had an impact on the availability of resources. How can volcanic eruptions impact the availability of resources?

• by decreasing the thickness of soil

• by causing more heavy rains to erode topsoil

• by disrupting the sunlight from reaching producers

• by causing the surface of earth to be warmer than usual

When a plant wilts, the stomata close. How does this help the plant?

• It reduces water intake by roots

• reduces further water loss

• It increases photosynthesis

• It increases cellular respiration