Unit 5 Ecosystems Assessment

The organisms the live around a pond interact with biotic and abiotic factors. Which of the following is a biotic factor of the pond environment.

• cattail plants

• muddy soil

• slowly flowing water

• warm temperature

A coral reef has many different kinds of species. An area ear the arctic has few species. Which term describes the variety of species that live in an ecosystem?

• diversity

• community

• niche

• population

Alejandra wants to identify an ecosystem to research. She starts by looking at the globe. Where on the globe should she look to identify the most areas with high biodiversity?

• near the equator

• near mountains

• near water

• near the north or south pole

A volcano erupts and covers the ground with lava that hardens into rock. As primary succession begins, which organism is likely to be the first to populate the area?

• lichens

• bears

• snakes

• birds

Sometimes a species that is introduced to an area grows quickly and crowds out organisms that were already living there. What is this introduced species called?

• an invasive species

• a beneficial species

• a native species

• a protected species

In a science experiment, soil was placed in four different beakers. The diagram below shows the conditions of the soil for each beaker. Which of the beakers models drought conditions?

• Beaker D

• Beaker A

• Beaker B

• Beaker C

A farmer plants corn every year. One year, the farm experiences a drought and receives less rainfall than is normal during the growing season. Which of the following is the most likely result?

• The corn plants will not grow at all.

• The corn plants will be taller than usual.

• The corn plants will be shorter than usual.

• The corn plants will grow the same as usual.

Tropical rain forests are ecosystems that have a great deal of diversity. Many different organisms live there because of the abundance of resources. Which factors affect the amount of resources and the diversity of an ecosystem?

• climate and location

• minerals and sunshine

• motion and humans

• age and altitude

Which of the following things signals that an ecosystem has become a stable community after years of succession?

• trees

• soil

• rocks

• moss

The picture below shows organisms that live in a land ecosystem. Which organism is the producer?

• organism 1

• organism 2

• organism 3

• organism 4