Chapter One Practice Test Environmental Science

Which of the following is a BIOTIC factor in a prairie ecosystem?

• Water
• Sunlight
• Soil
• Grass

The place where an organism lives and that provides the things the organism needs is called its

• habitat
• population
• species
• community

The smallest unit of ecological organization is a single

• population
• community
• organism
• ecosystem

Which of the following is an example of population?

• the cats and dogs in your neighborhood
• the bushes and grass in a park
• the rocks in a rock collection
• the gray wolves in a forest

If you count 20 beetles in a garden measuring 5 square meters, the population density if the beetles is

• 100 beetles per square meter
• 10 beetles per square meter
• 20 beetles per square meter
• 4 beetles per square meter

Counting the number of organisms in a small area and multiplying to estimate the number in a larger area i called

• direct observation
• mark and recapture
• population density
• sampling

A group of antelope leaving the herd in search of better grassland is an example of

• immigration
• emigration
• increasing birth rate
• decreasing death rate

An approximation of a number, based on reasonable assumptions is called a(n)

• biotic factor
• limiting factor
• immigration
• estimate

The largest population that an environment can support is called its

• carrying capacity
• limiting factor
• birth rate
• death rate

An organism's particular role in its habitat, or how it makes its living, is called its

• carrying capacity
• ecosystem
• competition
• niche