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.

This is the Benchmark Grade Breakdown Grade # Correct Points Earned A 38-40 114-120 B 34-37 102-111 C 28-33 84-99 D 24-27 72-81 F 0 -23 0 -69

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 A X D B C

2. 6B A food web is shown in the diagram below. Hawk Frog Rabbit Field Mouse Cricket Grass Which statement best describes a direct result of a decrease in the rabbit population due to disease? A. The hawk population will increase. B. The grass population will increase. C. The cricket population will decrease. D. The frog population will be eliminated.

B.The number of secondary consumers. 3. 6B Which factor most determines the type of plants that grow in an area? A. Climate of the area. B.The number of secondary consumers. C. Depth of the pond in the area. D. Percentage of nitrogen in the air.

4. 6B Climate is a global factor that produces A. Earth’s unique ocean and atmosphere. B. The shape and elevation of landmasses. C. A wide range of environmental conditions that shape communities. D. Solar energy within the atmosphere.

5. 6B Which type of biome occupies the largest area of Earth? A.Temperate Decidous Forest B.Tropical Rain Forest C. Grasslands D. Marine

6. 6B Some scientist think that global warming is A. a natural variation in climate. B. a result of human activities. C. melting the polar ice caps. D. all of the above

7. 6A When scientists measure the biodiversity of a habitat, they consider- A. The diversity in plants. B. The kind of producers & consumers. C. The variation in animals. 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 B. ozone depletion C. global warming D. particulate dispersion.

9. 6B Biomes A. C B. B C. D D. E A. Tropical Rain Forest B. Temperate Deciduous Forest C. Taiga D. Tundra E. Grassland F. Desert Which biome is characterized by moderate rainfall, cold winters, and the presence of foxes and deer? A. C B. B C. D D. E

10. Continued A. Live in harmony with species D B. Move to a different level with species A or species C. C. Stay at that level but change their diet. D. Compete with species D.

11. 6B The sum total of the genetically-based variety of living organisms in a biosphere is called----? A. species diversity B. biodiversity C. sustainable use D. conservation biology

12. 6B All of the following are threats to biodiversity EXCEPT for A. Species preservation B. Invasive species C. Habitat Fragmentation D. Biological magnification of toxic compounds.

13. 6B An endangered species is A. A diseased animal B. A dangered predator C. A group of organisms near extinction. 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. B. All the nonliving materials in a specific location. C. Some non-living materials and living organism in a specific location.

15. 6B Biodiversity is valuable in the biosphere because it A. is the biological life-support system of our planet. B. gives us interesting things to look at. C. tells us about many other species.

6D, 6E & 6F

16. 6F Organisms in each trophic level of a food chain pass on- A. Less energy than they received B. More energy than they received C. The same amount of energy as they received D. No energy

Energy lost due to movement waste that is released 17. 6F Each level of the pyramid is smaller than the level below it because some of the matter is converted into. Energy lost due to movement waste that is released energy lost due to heat all of the above .5 Question on amounts of energy transferred in pyramid. 5 50 500

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

A. Hererotroph B. Consumer C. Detrivore D. Autotroph 19. An organism that uses energy to produce its own food supply from inorganic compounds is called a(an) A. Hererotroph B. Consumer C. Detrivore D. Autotroph

20. A decrease in which group would create instability in an ecosystem first? A. Producer B. Primary Consumer C. Secondary Consumer D. Decomposer

A.The weight & number of fish 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 B. The number of snails & plants C. The size & number of fish D. The temp and O2 levels

B. Mice C. Plants D. None of the above A. Snakes 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 Question on amounts of energy transferred in pyramid.

23. The action of a decomposer in the nitrogen cycle most directly aids in the A. Synthesis of proteins from nitrates B. Removal of nitrogen compounds from the atmosphere C. Restoration of nitrogen compounds to the soil D. Fixation of the atmospheric nitrogen

24. The maintenance of a self-sustaining ecosystem requires a A. Soil that is acidic B. Contant temperature C. Cycling of materials between organisms and their environment 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 B A. A-O2 & B-CO2 B. A-O2 & B-Sugars C. A-N & B-CO2 D. A-CO2 & B-O2

26. 6E An organism that cannot make its own food is called a (an) A. heterotroph B. chemotroph C. autotroph D. consumer E. 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 Question on where much of the energy goes in a food web or food chain.

A. Ecological succession B. A food chain C. Natural selection 28. 6F Energy stored in organic molecules is passed from producers to consumers. This statement best describes an event in A. Ecological succession B. A food chain C. Natural selection D. photosynthesis

A. Burning of trees and forest. B. Burning of fossil fuels. 29. 6B Carbon dioxide is released into the atmosphere by all of the following EXCEPT for the A. Burning of trees and forest. B. Burning of fossil fuels. C. Depletion of the ozone layer. D. Cellular Respiration

30. 6f What is the original source of almost all energy in most ecosystems? A. Carbohydrates B. Sunlight C. Water D. Carbon Question on original source of energy.

6C

C. Geographic distribution D. Population density 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 B. Age structure C. Geographic distribution D. Population density

32. 6C When organisms move into a given area from another area, what is taking place? A. immigration B. emigration C. Population shift D. Carrying capacity

33. 6C When organisms move out of the population they were born in, it is known as A. emigration B. abandonment C. immigration D. succession

34. 6C Which are two ways a population can decrease in size? A. Immigration and emigration B. Increase death rate & immigration C. Decreased birthrate and emigration 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. B. Limiting Nutrient. C. Limiting Factor D. Growth factor

A. Carrying Capacity. B. Logistic growth C. Limiting Factor 36.6C The number of organisms that an environment can support over a relatively long period of time is called A. Carrying Capacity. B. Logistic growth C. Limiting Factor D. Exponential growth

37.6C If a population grows larger than the carrying capacity of the environment, the A. Death rate may rise. B. Birthrate may rise. C. Death rate must fall D. Birthrate must fall

38.6C Demography is the scientific study of A. Democratic societies B. Modernized countries C. Human populations D. Economic transitions

39.6C One of the main characteristics of a population is its A. Change over time B. Geographic distribution C. Dynamics D. Habitat

40.6C Demographic transition begins with changes in society that A. Lower the birthrate. B. Modernize the country. C. Lower the death rate. D. Explain why populations change.