Quiz about TNReady Review 6th Science

Question 1

What is a population?

Accepted Answer

a group of individuals of the same species living in the same area

Answer

a group of different species living in the same area

Answer

a group of different species living in separated areas

Answer

a group of individuals of the same species living in separated areas

Question 2

Which of the following organisms is most likely to be a pioneer species in an ecosystem?

Accepted Answer

moss

Answer

a tall tree

Answer

a shrub

Answer

a mouse

Question 3

Which type of energy involves harnessing heat produced within Earth to generate electricity?

Accepted Answer

geothermal energy

Answer

solar energy

Answer

nuclear energy

Answer

hydroelectric energy

Question 4

What is the role of a photovoltaic cell in harnessing energy for people to use?

Accepted Answer

It converts solar energy into electricity.

Answer

It heats water that can be used to warm buildings.

Answer

It reflects energy away from Earth and toward space.

Answer

It uses the energy of moving water to rotate a turbine.

Question 5

Runoff is most like which of the following?

Accepted Answer

a flowing stream

Answer

a puff of steam

Answer

a cloud in the sky

Answer

an invisible form of water

Question 6

Which of the following has elastic potential energy?

Accepted Answer

a stretched rubber band

Answer

a vase sitting on a shelf

Answer

a child moving down a slide

Answer

sugars stored in the molecules of food

Question 7

A student is going to compress the object shown in the diagram. Which form of energy will the object gain when it is compressed?

Accepted Answer

mechanical

Answer

chemical

Answer

electrical

Answer

electromagnetic

Question 8

Which type of resource is used to make plastics?

Accepted Answer

petroleum

Answer

coal

Answer

uranium

Answer

natural gas

Question 9

The graph below shows the population of Los Angeles, California, from 1910 to 2000. What is a plausible explanation for what happened in Los Angeles from 1910 to 2000, according to

the graph?

Accepted Answer

urbanization

Answer

conservation

Answer

deforestation

Answer

erosion

Question 10

Which of the following is not able to become runoff?

Accepted Answer

ocean water

Answer

river water

Answer

precipitation

Answer

groundwater

Question 11

Which of the following is not able to become runoff?

Accepted Answer

ocean water

Answer

river water

Answer

precipitation

Answer

groundwater

Question 12

How would the introduction of an exotic species most likely affect an ecosystem?

Accepted Answer

It would compete with native species for resources.

Answer

It would pollute the water or land.

Answer

It would increase the available resources.

Answer

It would cause the size of the ecosystem to increase.

Question 13

Most producers use sunlight to make food through photosynthesis. What are the products of photosynthesis?

Accepted Answer

sugar and oxygen

Answer

carbon dioxide and water

Answer

chlorophyll, protein, and DNA

Answer

plant stems, leaves, and root systems

Question 14

Which energy transfer takes place when water freezes to form ice crystals in the atmosphere?

Accepted Answer

Energy is transferred from the water into the air.

Answer

No energy is transferred.

Answer

Energy is transferred from the air into the water.

Answer

Energy is transferred from the water into the ground.

Question 15

The following diagram shows how warm water and cool water move in the ocean. Which process does the diagram show?

Accepted Answer

convection

Answer

radiation

Answer

absorption

Answer

conduction

Question 16

Many of the hybrid cars that people drive today run by burning gasoline, just as regular cars do. However, for some of the time that a hybrid car runs, it also charges an electric battery. This battery can be used to power the car so that the hybrid uses less gasoline than a regular car does. How could a hybrid car help reduce air pollution?

Accepted Answer

It burns less gasoline than a regular car does and thus produces less harmful exhaust.

Answer

It stores the harmful exhaust that it creates and uses that to power the car

Answer

It uses alternative energy sources instead of gasoline, which produces harmful exhaust.

Answer

It drives faster than a regular car does and therefore spends less time producing harmful exhaust.

Question 17

Without other changes to a population, which of the following will cause a population to increase in size?

Accepted Answer

The birth rate is greater than the death rate.

Answer

The birth rate equals the death rate.

Answer

The birth rate is less than the death rate.

Answer

The birth rate and the death rate both equal 0.

Question 18

What happens when energy is released during atomic fission?

Accepted Answer

The nucleus of a large atom is split apart.

Answer

Fuels are burned in oxygen.

Answer

Atoms bond together to form new substances.

Answer

Atoms are destroyed as new atoms are formed.

Question 19

What is weather forecasting?

Accepted Answer

studying data to predict likely future weather conditions

Answer

studying data to learn more about past weather events

Answer

studying many sources of data to learn more about current weather conditions.

Answer

studying data received from satellite images to learn more about current weather conditions

Question 20

The following image shows a region used to grow crops. How does the image show a method of conservation?

Accepted Answer

Arranging the steep land into levels slows erosion.

Answer

Plowing land into layers causes plants to grow taller.

Answer

Making the land steeper helps water flow more easily.

Answer

Planting more seeds results in a greater number of plants.

Question 21

Water molecules are polar molecules. What is meant by the term polar molecule?

Accepted Answer

a molecule that has an overall positive charge on one end and an overall negative charge on the

other end

Answer

a molecule that has no charge on one end and either an overall negative or positive charge on the

other end

Answer

a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end

Answer

a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end

Question 22

Scientists studied predator-prey relationships in a habitat. The diagram below shows the feeding relationships among organisms that a scientist might find in a certain environment. Which animal is both a predator and prey?

Accepted Answer

snake

Answer

owl

Answer

plant

Answer

cricket

Question 23

What is kinetic energy?

Accepted Answer

energy of motion

Answer

the sum of mechanical energy and potential energy

Answer

stored energy due to position

Answer

stored energy due to chemical composition

Question 24

A television weather forecaster said that warm, humid air near the ground was moving vertically into the cooler air above. What is likely to happen as a result?

Accepted Answer

a thunderstorm

Answer

a tornado

Answer

a hurricane

Answer

a storm surge

Question 25

Why do plants that grow in the tundra have shallow root systems?

Accepted Answer

They cannot grow through the permafrost.

Answer

They have no soil in which to grow.

Answer

They are frequently soaked by heavy rains.

Answer

They are trampled each time animals migrate.

Question 26

The turbine shown below is used to produce energy for human use. What type of energy conversion takes place in the turbine?

Accepted Answer

wind energy to produce electrical energy

Answer

solar energy to produce mechanical energy

Answer

thermal energy to produce chemical energy

Answer

energy from moving water to produce mechanical energy

Question 27

The graph below shows the size of a squirrel population over 20 years. The trend displayed on the graph could be a result of what factor?

Accepted Answer

immigration

Answer

emigration

Answer

increased death rate

Answer

scarce resources

Question 28

Coal is a natural resource. Why is coal considered nonrenewable?

Accepted Answer

Coal is being used faster than it is being produced.

Answer

Coal will never run out.

Answer

No new coal is being produced on Earth.

Answer

Coal is used to produce energy and not materials.

Question 29

Trees can be classified as different kinds of resources. Which of these statements gives a reason for classifying a tree as an energy resource?

Accepted Answer

It can be burned to provide heat.

Answer

It is a renewable resource.

Answer

It can be used to build a home.

Answer

It requires energy to grow a tree

Question 30

The law of conservation of energy describes

how the amount of total energy can change in a

closed system. Which of these statements

correctly describes this law?

Accepted Answer

Energy can be converted from one form into

another, but it cannot be created or destroyed

Answer

The amount of kinetic energy in a system is a

constant value

Answer

An object can have potential energy or

kinetic energy, but not both at the same time.

Answer

The amount of energy created when an object

moves is equal to the energy destroyed when

it stops moving.

Question 31

As Wilma holds a pan over a fire, the water begins to boil, as shown in the figure below. Which process is indicated by the letter X?

Accepted Answer

convection

Answer

radiation

Answer

insulation

Answer

conduction

Question 32

As Wilma holds a pan over a fire, the water begins to boil, as shown in the figure below. Which process is indicated by the letter Y?

Accepted Answer

conduction

Answer

radiation

Answer

insulation

Answer

convection

Question 33

As Wilma holds a pan over a fire, the water begins to boil, as shown in the figure below. Which process is indicated by the letter Z?

Accepted Answer

radiation

Answer

insulation

Answer

conduction

Answer

convection

Question 34

Three children are lined up to run a 50-meter race. The children all weigh the same. They start running at the same speed, but child 1 runs fastest over the final 10 meters and crosses the finish line first. What is true about the kinetic

energy of child 1 at the moment she crosses the finish line?

Accepted Answer

It is greater than that of the other two children.

Answer

It is less than that of the other two children

Answer

It is the same as that of the other two children.

Answer

Child 1 has no kinetic energy at the moment she crosses the finish line.

Question 35

Which change of state takes place when a gas

loses energy?

Accepted Answer

condensation

Answer

melting

Answer

evaporation

Answer

solidification

Question 36

Each organism has its own role in an ecosystem. Organisms can be producers, consumers, or decomposers. Which of these organisms can be classified as a decomposer?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 37

Which of the following consumers is a herbivore?

Accepted Answer

horse

Answer

cat

Answer

human

Answer

vulture

Question 38

Which level of an energy pyramid contains the most energy?

Accepted Answer

primary producer

Answer

primary consumer

Answer

secondary consumer

Answer

tertiary consumer

Question 39

All organisms must obtain energy from their environment. Every organism needs this energy in order to grow and reproduce. How do producers obtain energy?

Accepted Answer

They capture energy from sunlight and manufacture their own food.

Answer

They obtain energy by eating plants, bacteria, and algae.

Answer

They extract chemical energy from decaying organic matter.

Answer

They extract energy from the chemicals in soil, air, and water.

Question 40

Which of the following is an example of commensalism?

Accepted Answer

A bird finds an existing hole in a tree and builds a nest in it.

Answer

A bird is hunted, killed, and eaten by a cat

Answer

A bird eats berries, then spreads the seeds.

Answer

A bird finds a small shellfish on a beach, cracks its shell, and eats it.

Question 41

What is one way that a temperate rain forest is different from a temperate deciduous forest?

Accepted Answer

A temperate rain forest has a long rainy season rather than moderate, year-round rainfall.

Answer

A temperate rain forest has large populations of grasses rather than tall trees.

Answer

A temperate rain forest is made up of palm trees rather than coniferous trees.

Answer

A temperate rain forest has trees that lose their leaves in winter rather than keeping them year-round.

Question 42

Which example represents an abiotic factor in an aquatic ecosystem?

Accepted Answer

The pH of a lake is decreased by acid rain.

Answer

Water lilies float on top of a pond.

Answer

A population of bass is living in a lake.

Answer

Dragonflies feed on small insects near a pond.

Question 43

Which term best describes the number and variety of organisms in a given area during a specific period of time?

Accepted Answer

biodiversity

Answer

carrying capacity

Answer

succession

Answer

eutrophication

Question 44

The diagram shows changes to a pond ecosystem over time. Through which of the following processes are plant communities taking over the ecosystem?

Accepted Answer

natural eutrophication

Answer

acidification

Answer

primary succession

Answer

climate disturbance

Question 45

Which biome has the least variation in temperature throughout the year?

Accepted Answer

tropical rainforest

Answer

taiga

Answer

tundra

Answer

temperate deciduous forest

Question 46

The picture shows an arctic fox. In which biome does the fox most likely live?

Accepted Answer

tundra

Answer

desert

Answer

grasslands

Answer

temperate rain forest

TNReady Review 6th Science

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