Science Unit 1: Trees and Forests

A community of living things interacting with each other and their nonliving environment is called a/an:

• Ecosystem

• Desert

• Forest

• Ocean

The forest is an example of a/an:

• Organism

• Community

• Ecosystem

• Park

Forests provide us with oxygen, control erosion, provide food/shelter, act as sound barriers, and protect us from heat/cold winds.

• True

• False

What are abiotic factors?

• Decomposers

• The nonliving parts of the environment that affect living organisms

• Consumers

• The living parts of the environment

The levels of the forest, in order from top to bottom, are:

• Canopy, floor, subfloor, understory

• Subfloor, floor, understory, canopy

• Floor, understory, canopy, subfloor

• Canopy, understory, floor, subfloor

What can be found in a forest's subfloor?

• Leaf litter, toads, worms, bacteria, roots

• Leaves, branches, owls

• Small trees, shrubs, squirrels, woodpeckers

• Ferns, wildflowers, tree seedlings, deer

A forest's canopy is:

• The top level, intercepting 35% of all precipitation, consisting of leaves and branches.

• The bottom level, containing decomposing matter and humus (organic material).

• Made of giant umbrellas.

• Where only consumers live.

What is the purpose of a forest's subfloor?

• To provide protection from the Sun's heat and cold winds

• To decompose fallen material

• To provide shelter for birds and small mammals

• To protect the tree roots underneath

Tiny organisms that break down dead matter and turn it back into soil are called:

• Consumers

• Producers

• Organisms

• Decomposers

Organisms that can make their own food (such as plants) are called:

• Consumers

• Animals

• Decomposers

• Producers