Indiana Science Grade 7

Chapter 7: Interactions of Living Things

Interactions of Living Things

1.
Which abiotic factor limits plant growth on the forest floor?
A)water
B)temperature
C)air
D)sunlight
2.
All of the goldfish in an aquarium would represent a(n) __________.
A)population
B)community
C)biome
D)ecosystem
3.
Soil type is determined by the amounts of __________ it contains.
A)insects, worms, and bacteria
B)oxygen, nitrogen, and carbon dioxide
C)sand, humus, and clay
D)gravel, wood, and water
4.
The number of individuals in a population that occupy a definite area is called __________.
A)population density
B)population spacing
C)population size
D)population decrease
5.
Due to __________, populations cannot continue to grow larger forever.
A)symbiosis
B)limiting factors
C)habitats
D)biotic potential
6.
The water cycle involves the processes of evaporation, condensation, and __________.
A)precipitation
B)photosynthesis
C)decomposition
D)symbiosis
7.
Bacteria nodules associated with certain plants change _________ from the air into a form that can be used by most organisms.
A)carbon dioxide
B)oxygen
C)nitrogen
D)water vapor
8.
A pond has enough nesting space for 200 ducks. When the duck population increases to 250, some ducks cannot find nesting spaces. This pond has reached its __________ for ducks.
A)biotic potential
B)carrying capacity
C)limiting factor
D)population density
9.
How long have the carbon atoms in your body been on Earth?
A)15 minutes
B)billions of years
C)as long as you have been alive
D)probably less than one year
10.
The role that a species plays in a community is its __________.
A)niche
B)biotic potential
C)carrying capacity
D)habitat
11.
Which organisms in a food chain have the least available energy?
A)those in the first link
B)those in the last link
C)All have the same amount of available energy.
D)those in the middle links
12.
Which one of the following would be an abiotic factor in an environment?
A)fish in an ocean
B)bees in a garden
C)decaying logs in a forest
D)total rainfall in a desert
13.
What cycle of matter involves carbon dioxide in Earth's atmosphere?
A)water
B)carbon
C)nitrogen
D)oxygen
14.
Which one of the following is an example of predation?
A)deer drinking water from a stream
B)birds building nests
C)bats eating insects
D)bees collecting nectar from flowers
15.
A symbiotic relationship that benefits both species is called __________.
A)mutualism
B)parasitism
C)commensalism
D)predation
16.
The bodies of most organisms are 50 percent to 95 percent ________.
A)sugar
B)energy
C)air
D)water
17.
Population spacing that results when birds gather in flocks is described as __________.
A)random spacing
B)even spacing
C)clumped spacing
D)independent spacing
18.
Which one of the following would be an example of an organism you would expect to find at the bottom of an ecological pyramid?
A)human
B)oak tree
C)squirrel
D)beetle
19.
The __________ is a layer of gases and airborne particles that surrounds Earth.
A)weather
B)atmosphere
C)biosphere
D)biome
20.
An energy pyramid usually has only __________ levels.
A)one or two
B)five or six
C)three or four
D)four or five
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