Take Practice Test: On a separate sheet of paper write down numbers 1-40.

1. 2. 3. through 40. Indicate which ones you got correct with + or - . Use the grade breakdown to check your score.

A 38-40 114-120 B 34-37 102-111 C 28-33 84-99 D 24-27 72-81F 0 -23 0 -69

Grade # Correct Points Earned

This is the Benchmark Grade Breakdown

6A & 6B

The Green Questions are test-like questions and Gold Questions are the most missed test-like questions.

1. 6B The diagram below represents a tree containing three different species of warbler. A,B and C. Each species occupies a different niche. A fourth species,D, which has the same environmental requirements as species B, enters the tree at point X. Members of species B will most likely

AX D

BC

2. 6B A food web is shown in the diagram below.

A. The hawk population will increase.

C. The cricket population will decrease.B. The grass population will increase.

D. The frog population will be eliminated.

Which statement best describes a direct result of a decrease in the rabbit population due to disease?

Hawk

Field Mouse

Grass

RabbitFrog

Cricket

3. 6B Which factor most determines the type of plants that grow in an area?A. Climate of the area.

C. Depth of the pond in the area.

B.The number of secondary consumers.

D. Percentage of nitrogen in the air.

4. 6B Climate is a global factor that producesA. Earth’s unique ocean and atmosphere.

C. A wide range of environmental conditions that shape communities.

B. The shape and elevation of landmasses.

D. Solar energy within the atmosphere.

5. 6B Which type of biome occupies the largest area of Earth?A.Temperate Decidous Forest

C. GrasslandsB.Tropical Rain Forest

D. Marine

6. 6B Some scientist think that global warming isA. a natural variation in climate.

C. melting the polar ice caps.

B. a result of human activities.

D. all of the above

7. 6A When scientists measure the biodiversity of a habitat, they consider-A. The diversity in plants.

C. The variation in animals.

B. The kind of producers & consumers.

D. All of the organisms.

8. 6B An increase in the Earth’s average temperature from the build up of carbon dioxide and other gases in the atmosphere is called?A. the greenhouse effect

C. global warmingB. ozone depletion

D. particulate dispersion.

9. 6B Biomes

A. C B. BC. D D. E

B. Temperate Deciduous ForestA. Tropical Rain Forest

C. Taiga D. TundraE. Grassland F. DesertWhich biome is characterized by moderate rainfall, cold winters, and the presence of foxes and deer?

A. Live in harmony with species D

C. Stay at that level but change their diet.

B. Move to a different level with species A or species C.

D. Compete with species D.

10. 6B The diagram below represents a tree containing three different species of warbler. A,B and C. Each species occupies a different niche. A fourth species,D, which has the same environmental requirements as species B, enters the tree at point X. Members of species B will most likely

AX D

BC

10. Continued

11. 6B The sum total of the genetically-based variety of living organisms in a biosphere is called----?A. species diversity

C. sustainable useB. biodiversity

D. conservation biology

12. 6B All of the following are threats to biodiversity EXCEPT forA. Species preservation

C. Habitat FragmentationB. Invasive species

D. Biological magnification of toxic compounds.

13. 6B An endangered species isA. A diseased animal

C. A group of organisms near extinction.

B. A dangered predator

D. All organisms at the top of the food chain.

14. 6B Which phrase best describes an ecosystem?A. All the organisms in a specific location.

C. Some non-living materials and living organism in a specific location.

B. All the nonliving materials in a specific location.

15. 6B Biodiversity is valuable in the biosphere because itA. is the biological life-support system of our planet.

C. tells us about many other species.

B. gives us interesting things to look at.

6D, 6E & 6F

16. 6F Organisms in each trophic level of a food chain pass on-A. Less energy than they received

C. The same amount of energy as they received

B. More energy than they received

D. No energy

500

550

.5

A.Energy lost due to movement

B. waste that is released

C. energy lost due to heat

D. all of the above

17. 6F Each level of the pyramid is smaller than the level below it because some of the matter is converted into.

18. 6D As water cycles through an ecosystem, which process returns it to the atmosphere?A. hydrolysis

C. condensationB. cyclosis

D. transpiration

19. An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)

A. Hererotroph

C. DetrivoreB. Consumer

D. Autotroph

20. A decrease in which group would create instability in an ecosystem first?A. Producer

C. Secondary ConsumerB. Primary Consumer

D. Decomposer

21. A student measured some abiotic factors present in an aquarium in a biology lab. Which data did the student most likely record?

A.The weight & number of fish

C. The size & number of fishB. The number of snails & plants

D. The temp and O2 levels

22. 6f The diagram below shows a food pyramid, Which level of the food pyramid contains consumers with the least biomass?

A. Snakes

B. Mice

C. Plants

D. None of the above

23. The action of a decomposer in the nitrogen cycle most directly aids in theA. Synthesis of proteins from nitrates

C. Restoration of nitrogen compounds to the soil

B. Removal of nitrogen compounds from the atmosphere

D. Fixation of the atmospheric nitrogen

24. The maintenance of a self-sustaining ecosystem requires aA. Soil that is acidic

C. Cycling of materials between organisms and their environment

B. Contant temperature

D. Greater number of herbivores than producers

25. The diagram below shows an example of interdependence among land organisms. During the day, plants mostly give off substance A , as shown by the arrows.What are the substances represented by A and B?A. A-O2 & B-CO2

C. A-N & B-CO2

B. A-O2 & B-Sugars

D. A-CO2 & B-O2

AB

26. 6E An organism that cannot make its own food is called a (an)

A. heterotrophB. chemotrophC. autotrophD. consumerE. both A & D

27. 6f Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is…

A. used in reproduction

B. stored as body tissue.

C. stored as fat.

D. eliminated as heat

28. 6F Energy stored in organic molecules is passed from producers to consumers. This statement best describes an event inA. Ecological succession

C. Natural selectionB. A food chain

D. photosynthesis

29. 6B Carbon dioxide is released into the atmosphere by all of the following EXCEPT for the

A. Burning of trees and forest.

C. Depletion of the ozone layer.

B. Burning of fossil fuels.

D. Cellular Respiration

30. 6f What is the original source of almost all energy in most ecosystems?

A. CarbohydratesB. SunlightC. Water D. Carbon

6C

31. 6C There are 150 saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristics does this information refer?A. Growth rate

C. Geographic distributionB. Age structure

D. Population density

32. 6C When organisms move into a given area from another area, what is taking place?A. immigration

C. Population shiftB. emigration

D. Carrying capacity

33. 6C When organisms move out of the population they were born in, it is known asA. emigration

C. immigrationB. abandonment

D. succession

34. 6C Which are two ways a population can decrease in size?A. Immigration and emigration

C. Decreased birthrate and emigrationB. Increase death rate & immigration

D. Emigration & increased birthrate

35.6C Biotic or abiotic resources in the environment that limits the size of a population is a A. Carrying Capacity.

C. Limiting FactorB. Limiting Nutrient.

D. Growth factor

36.6C The number of organisms that an environment can support over a relatively long period of time is called A. Carrying Capacity.

C. Limiting FactorB. Logistic growth

D. Exponential growth

37.6C If a population grows larger than the carrying capacity of the environment, theA. Death rate may rise.

C. Death rate must fallB. Birthrate may rise.

D. Birthrate must fall

38.6C Demography is the scientific study ofA. Democratic societies

C. Human populationsB. Modernized countries

D. Economic transitions

39.6C One of the main characteristics of a population is its A. Change over time

C. DynamicsB. Geographic distribution

D. Habitat

40.6C Demographic transition begins with changes in society thatA. Lower the birthrate.

C. Lower the death rate.B. Modernize the country.

D. Explain why populations change.