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7th Grade Exam Review First Semester

Total questions: 99

Worksheet time: 50mins

Name
Class
Date
1.

One useful tool that may help a scientist interpret data by revealing unexpected patterns is a

a)

graph.

b)

law.

c)

theory.

d)

variable.

2.

A summary of what you have learned from a scientific experiment is called a(n)

a)

inquiry.

b)

lawl

c)

conclusion.

d)

hypothesis.

3.

An organized way to collect and record scientific observations is with a(n)

a)

inference.

b)

operational definition.

c)

data table.

d)

model.

4.

Which method is NOT used to prevent bias during scientific inquiry?

a)

repeating investigations

b)

testing several hypotheses

c)

conducting blind studies

d)

using random sampling

5.

Which pair below are dissecting tools?

a)

pipette and slide

b)

magnifying lens and pipette

c)

scalpel and scissors

d)

slide and scalpel

6.

A description of how close a measurement is to an accepted value

a)

Accuracy

b)

Precision

c)

Observation

d)

Prediction

7.

A description of how similar measurements are to one another

a)

Accuracy

b)

Precision

c)

Predictions

d)

Hypothesis

8.

What is scientific inquiry?

a)

an unchanging set of steps used by all scientists

b)

a process that uses skills and methods to answer questions

c)

a method that always results in new scientific theories

d)

the questioning of scientific laws

9.

793 g = _______ kg

a)

.793

b)

7.93

c)

793,000

d)

79.300

10.
It's OK to take something from the lab as long as you return it.
a)
True
b)
False
11.
If your lab partner's hair caught fire, you should spray him/her with the fire extinguisher.
a)
True
b)
False
12.
Both food and gum are permitted in lab.
a)
True
b)
False
13.
Safety symbols alert you to possible dangers and identify safety equipment you should use.
a)
True
b)
False
14.
If an accident occurs, you should immediately notify the fire department.
a)
True
b)
False
15.
It is important to taste a chemical to find out exactly what you are working with in the lab.
a)
True
b)
False
16.
What is the proper way to smell a chemical mixture in an experiment?
a)
waft
b)
blow your nose then take a big wiff
c)
take a big sniff
d)
snort
17.
What liquid do you use if a foreign substance gets into your eye during an experiment?
a)
eyewash
b)
water
c)
soap
d)
goggles
18.
What is the first thing you should do if an accident occurs?
a)
Find the emergency equipment.
b)
Start first aid treatment.
c)
Go to the nearest hospital.
d)
Notify your teacher.
19.
An organism that eats both plants and animals
a)
Omnivore
b)
Decomposer
c)
Herbivore
d)
Scavenger
20.
It shows the amount of energy that moves from one feeding level to another
a)
Food Chain
b)
Food Web
c)
Energy Pyramid
d)
Primary Succession
21.
Organism that can make its own food
a)
Producer
b)
Consumer
c)
Herbivore
d)
Carnivore
22.
The many overlapping food chains in an ecosystem
a)
Food Chain
b)
Energy Pyramid
c)
Food Web
d)
Secondary Succession
23.

Which combination is a likely food chain?

a)

mouse --> apple --> corn

b)

corn --> apple --> mouse

c)

hawk -->mouse --> corn

d)

corn --> mouse --> hawk

24.

What is a mouse that eats corn and grass?

a)

Carnivore

b)

Producer

c)

Herbivore

d)

Omnivore

25.

The process of making food using chemical energy instead of light energy is

a)

chemosynthesis.

b)

detritivoritis.

c)

conservation of energy.

d)

photosynthesis.

26.

The average weather over a period of time is called

a)

photosynthesis.

b)

climate.

c)

ecosystem.

d)

meteorology.

27.

What is a person who eats meat, vegetables, and fruits?

a)

Carnivore

b)

Producer

c)

Herbivore

d)

Omnivore

28.

What is a mouse that eats corn and grass?

a)

Carnivore

b)

Producer

c)

Herbivore

d)

Omnivore

29.

Which element do all living things contain?

a)

mercury

b)

iron

c)

carbon

d)

cobalt

30.

What is not a factor that describes a niche?

a)

The ways an organism uses resources

b)

The place within an ecosystem where an organism lives

c)

Usually unique to a species

d)

Helps species survive

31.

What type of relationship has all members of a population work together for their mutual survival?

a)

Symbiotic

b)

Cooperative

c)

Predator-prey

32.

Using energy to grow food, to heat homes, and for transportation are consequences of the continued human __________ that affects pollution.

a)

population growth

b)

carrying capacity

c)

population density

d)

limiting factor

33.

Which is NOT one of the four main factors that can lead to a population's decrease in size?

a)

overcrowding

b)

predation

c)

disease

d)

lack of basic needs

e)

natural disasters

34.

What do all the Earth's oceans, lakes, streams, ice caps, continents, and islands make up?

a)

niche

b)

biotic potential

c)

biosphere.

d)

habitat

35.

Which is NOT a limiting factor?

a)

Food

b)

Predators

c)

Oxygen

d)

Water

36.

An instinctive seasonal movement of a population from one place to another is

a)

webbing.

b)

preying.

c)

extinction.

d)

migration.

37.

What is it when a population is larger than the carrying capacity?

a)

population density.

b)

carrying capacity.

c)

overpopulation.

d)

migration.

38.

The potential growth of a population in perfect conditions with not limiting factors is

a)

abiotic potential.

b)

biotic potential.

c)

population density.

d)

carrying capacity.

39.

The size of a population compared to the amount of space available is

a)

carrying capacity.

b)

population density.

c)

overpopulation

d)

biotic potential.

40.

A diagram that shows part of the energy flow in a community is a(n)

a)

energy pyramid.

b)

seed dispersal.

c)

food chain.

d)

food web.

41.

A type of consumer that hunts other organisms for food is

a)

a predator.

b)

a detritivore.

c)

a prey.

d)

a host.

42.

An organisms that is hunted for food by another organism is

a)

a prey.

b)

a host.

c)

a predator.

d)

a producer.

43.

An organism that gets energy by eating dead organisms is

a)

an omnivore.

b)

a carnivore.

c)

a herbivore.

d)

a detritivore.

44.

All the different populations that live together in an area make up a(n)

a)

species.

b)

ecosystem.

c)

organism.

d)

community.

45.

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

a)

direct observation.

b)

mark and recapture.

c)

sampling.

d)

population density.

46.

The smallest unit of ecological organization is a single

a)

organism.

b)

ecosystem.

c)

population.

d)

community.

47.

What must be your chief concern be whenever you perform a lab?

a)

using equipment properly

b)

your group

c)

safety

d)

wearing goggles

48.

The step in the water cycle in which water vapor becomes liquid water is

a)

recycling.

b)

condensation.

c)

precipitation.

d)

nitrogen fixation.

49.

The first organism in a food chain is always a

a)

carnivore.

b)

consumer.

c)

producer.

d)

herbivore.

50.

What do producers release as a result of photosynthesis?

a)

oxygen

b)

hydrogen

c)

carbon dioxide

d)

nitrogen

51.

Which statement is true of all biotic factors?

a)

They use photosynthesis.

b)

They are alive.

c)

They use chemosynthesis.

d)

They are renewable.

52.

Which type of organism would you find at the lowest level of an energy pyramid?

a)

consumers

b)

producers

c)

decomposers

d)

herbivores

53.

Sam ate a bacon, lettuce, and tomato sandwich. Which term best describes Sam?

a)

omnivore

b)

producer

c)

decomposer

d)

herbivore

54.

Which includes a mixture of rocks, air, water, and the remains of once-living things?

a)

an ecosystem

b)

soil

c)

a biotic factor

d)

minerals

55.

Another name for mushrooms and bacteria that help cycle nutrients through the ecosystem is

a)

carnivores.

b)

detritivores.

c)

omnivores.

d)

decomposers.

56.

The process through which thermal energy from the Sun is absorbed and keeps the Earth warm is called the

a)

nitrogen fixation.

b)

chemosynthesis.

c)

greenhouse effect.

d)

photosynthesis.

57.

Which are 3 weather conditions that the climate includes?

a)

Soil, wind, moisture

b)

Wind, temperature, light

c)

temperature, light, soil

d)

wind, temperature, moisture

58.

Which situation represents an abiotic factor and a biotic factor?

a)

a chicken hatching from an egg

b)

a frog feeding on insects

c)

a caterpillar changing into a butterfly

d)

a tree growing in rich soil

59.

The consequences of clearing land for homes, roads, and crops results in

a)

access to food.

b)

improved medical care.

c)

fewer resources available.

d)

sanitation.

60.

Which is NOT a factor that describes a HABITAT?

a)

Provides the resources an organism needs

b)

The place within an ecosystem where an organism lives

c)

Shared by many species of organisms

d)

Helps species survive

e)

The ways an organism uses resources

61.

Drilling for oil and gas can interrupt migration patterns in a(n)

a)

tundra biome.

b)

taiga biome.

c)

grassland biome.

d)

tropical rain forest biome.

62.

The layer of soil that remains frozen all year is

a)

ice.

b)

estuary.

c)

aquifer.

d)

permafrost.

63.

Grasses are the dominant plants in the

a)

prairie biome.

b)

temperate rain forest.

c)

wetlands.

d)

deciduous forest.

64.

What type of forests grow near the equator?

a)

tropical rain forest.

b)

tundra.

c)

temperate rain forest.

d)

deciduous forest.

65.

A biome of the northern hemisphere dominated by forests consisting mostly of cone-bearing evergreen trees is the

a)

tiaga.

b)

tundra.

c)

tropical rain forest.

d)

desert.

66.

A group of land ecosystems with similar climates and organisms is called

a)

food web.

b)

climate.

c)

energy pyramid.

d)

biome.

67.

Temperate rain forests are moist ecosystems located mostly in

a)

near the poles.

b)

coastal areas.

c)

underwater areas.

d)

only close to the equator.

68.

What is the most common forest ecosystem?

a)

Temperate Deciduous Forest

b)

Temperate Rain Forest

c)

The 100-acre woods

d)

Tropical Rain Forest

69.

Which biome occupies more space than any other land biome on Earth?

a)

Taiga

b)

Tundra

c)

Grassland

d)

Temperate Deciduous Forest

70.

Which is NOT one of the aquatic ecosystems?

a)

freshwater

b)

wetland

c)

estuary

d)

iceberg

e)

ocean

71.

What forms where a stream or river flows into a body of salt water?

a)

wetlands

b)

estuaries

c)

permafrost

d)

tundra

72.

Most of the Earth's surface is covered by the __________ ecosystem.

a)

river

b)

ocean

c)

tundra

d)

pond

73.

A thin layer of water covering soil that is wet most of the time is found in

a)

tropical rainforest.

b)

temperate rainforest.

c)

the wetlands.

d)

etuaries.

74.

Hydroelectric plants impact which aquatic ecosystem?

a)

wetlands

b)

streams and rivers

c)

oceans

d)

ponds and lakes

75.

A land ecosystem is to a climax community as an aquatic ecosystem is to a

a)

land ecosystem.

b)

coral reef.

c)

freshwater ecosystem.

d)

climax community.

76.

The process of one ecological community changing into another is

a)

primary community.

b)

freshwater community.

c)

climax succession.

d)

an ecological succession.

77.

The first species that colonize new or undisturbed land are

a)

primary species.

b)

colonists.

c)

pioneer species.

d)

climax community.

78.

What are coastal biomes that have mild winters and cool summers?

a)

grassland

b)

deciduous forest

c)

temperate rain forest

d)

tropical rain forest

79.

The biome that receive less rain than others is the

a)

temperate rain forest.

b)

tiaga.

c)

deciduous forest.

d)

desert.

80.

Which resource is inexhaustible?

a)

land

b)

water

c)

fossil fuel

d)

solar energy

81.

Oxygen is a renewable resource because it is continually produced during the process of

a)

cellular respiration.

b)

photosynthesis.

c)

decay.

d)

evaporation.

82.

A key difference between renewable and nonrenewable resources is

a)

how useful they are to people.

b)

the processes by which they are produced.

c)

the rate at which they are replenished.

d)

where they are located on Earth.

83.

Which resource is NOT a fossil fuel?

a)

natural gas

b)

oil

c)

coal

d)

potassium

84.

Volcanic eruptions produce several forms of pollution including

a)

CFCs and O3.

b)

mercury and arsenic.

c)

ash and toxic gases.

d)

ozone and smog.

85.

Which object is NOT carried by runoff into streams and rivers?

a)

ozone

b)

fertilizer

c)

pesticide

d)

sediment

86.

Which two technologies are most useful for conserving water resources?

a)

hydrofluorocarbons and perfluorocarbons

b)

gasohol and biodiesel

c)

drip irrigation and low-flow toilets

d)

HEVs and FCVs

87.

CFCs are being phased out because they

a)

cause thinning of the ozone layer.

b)

carry pollutants into the ocean.

c)

carry nutrients out of the soil.

d)

cause glaciers to rapidly melt.

88.

The use of alternative fuels can reduce emissions that contribute to global warming and reduce

a)

the use of fossil fuels.

b)

the amount of pesticides in runoff.

c)

the amount of CFCs in the atmosphere.

d)

water waste.

89.

What is the primary waste product of a fuel cell?

a)

water

b)

hydrogen

c)

carbon dioxide

d)

oxygen

90.

Ozone is considered to be a pollutant in

a)

neither the upper nor lower atmosphere.

b)

the upper atmosphere only.

c)

the lower atmosphere.

d)

the upper and lower atmosphere.

91.

Which part of a CFC molecule damages ozone?

a)

oxygen

b)

chlorine

c)

fluorine

d)

carbon

92.

Which part of a wind turbine converts the energy in wind to electricity?

a)

transformer

b)

shaft

c)

blades

d)

generator

93.

Which activity involves manufacturing new products from old ones?

a)

recycling

b)

reducing

c)

restoring

d)

reusing

94.

Minerals and fossil fuels are similar because both

a)

are formed by hydrologic processes.

b)

are needed by the human body for good health.

c)

are formed over millions of years.

d)

result from the decay of once-living organisms.

95.

Wind is an example of an inexhaustible resource.

a)

True

b)

False

96.

According to scientific observations, Earth's average temperature is increasing.

a)

True

b)

False

97.

The use of compact fluorescent lightbulbs (CFLs) helps reduce greenhouse gas emissions.

a)

True

b)

False

98.

Pollution is the contamination of the environment with substances that are helpful to life.

a)

True

b)

False

99.

Which is a part of the coal ash sludge produced when coal is burned?

a)

nitrous oxide

b)

mercury

c)

hydroflurocarbons

d)

sulfur dioxide

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