Ecology Test: Human Impact on Ecosystems

All the living things in a meadow and the physical environment around them make up the meadow’s

• community

• population

• ecosystem

• niche

Combustion, photosynthesis, and respiration are processes that cycle _____ through the environment.

• carbon

• water

• nitrogen

• phosphorus

A substance evaporates from the ground, condenses in the air, and then falls back to the ground. This sequence of events is part of the

• carbon cycle

• water cycle

• nitrogen cycle

• energy cycle

A crab lives on a beach where it gets food, shelter, and space to live. The beach is the crab’s

• niche

• community

• habitat

• home

Choose the letter of the best answer. 5. All the leopard frogs in a pond make up the pond’s leopard frog

• population

• niche

• habitat

• ecosystem

Nutrient availability is a (a)   for the algae.

• habitat

• niche

• carrying capacity

• limiting factor

The maximum population that an environment can support is called its

• carrying capacity

• pioneer species

• ecosystem capacity

• holding capacity

Urban areas are defined as having

• steel buildings

• high altitudes

• large human populations

• cold climates

On Day 6, the population of Daphnia is about

• 400 organisms

• 50 organisms

• 150 organisms

• 75 organisms

What happens to the Daphnia population over the eight days shown on the graph?

• It increases.

• It decreases.

• It increases and then decreases.

• It decreases and then increases.