Seventh Grade Science 7Unit 6 Practice Quiz

1. How is carbon dioxide used in plants?

A. As a raw material for photosynthesis.B. To store energy in animals.C. As a source of energy.D. For protection from excessive sunlight.

2. Rank the biomes in order of lowest average annual precipitation to highest average annual precipitation.

1. Tropical Rainforest 2. Temperate Forest 3. Desert 4. Tundra

A. 3,4,2,1B. 3,4,1,2C. 4,3,1,2D. 4,3,2,1

3. How do characteristics of Taigas compare to the characteristics of Decidious forests?

A. Taigas are located near the equator whereas the deciduous forests are located near the poles.

B. The dominant trees found in a deciduous forest lose their leaves in the winter whereas the dominant trees in the taiga retain their leaves year round.

C. The dominant trees found in a taiga lose their leaves in the winter whereas the dominant trees in the deciduous forest retain their leaves year round.

D. The rainfall in a taiga is plentiful whereas the rainfall in a deciduous forest is very little.

4. Large region characterized by a specific type of climate and certain types of plants and animal communities is known as a ______________________.

A. biomeB. biosphereC. ecosystemD. organism

5. Which of these is used to describe and identify a biome?

A. The average precipitation and temperatureB. The characteristic community of organisms, especially plantsC. The distance from the equatorD. The specific geographical location

6. What is the best description of an animal that lives in a desert ecosystem?

A. They are light -colored, camouflaged to blend in, and most active at night.B. They are covered with fur to keep them insulated and they require a lot of water.C. They are equipped with webbed feet and they stay in water mosy of the day.D. They are brightly colored, easily seen in their surroundings, and active during the

day.

7. Which of the following contribute to the production of atmospheric carbon dioxide?

A. Oceanic sedimentsB. Burning fossil fuelsC. Photosynthesis by plantsD. Soil aeration

8. Biomes are classified by average annual temperature and precipitation. Which biome is characterized by no trees, limited available water due to extremely low temperatures, permafrost, 24 hour seasonal days and nights, as well as animals with thick fur and blubber?

A. taigaB. tundraC. alpine forestD. temperate forest

9.

The Denali National Park in Alaska has mostly spruce and Douglas fir evergreen trees. The winters are long and cold and the summers are short and very rainy. The soil is very rich. Moose and elk live here. This biome would be classified as the

A. taiga.B. tundra.C. tropical rain forest.D. deciduous forest.

10. Refer to the illustration above. An ecosystem located along the equator would probably

A. Have a shorter growing season than an ecosystem at 30° north or south latitude

B. Contain fewer species than an ecosystem at 30° north or south latitude

C. Have more species than an ecosystem at 30° north or south latitude

D. Have less rainfall than an ecosystem at 30° north or south latitude

11. Which of the following statements about savannas is true?

A. During the wet season, savannas receive little rainfallB. savanna inhabitants include large herbivoresC. savannas are characterized by steep mountainsD. savannas are rainy year round

12. Choose the abiotic factors that characterize the tundra biome.

A. warm, wet forestsB. arctic foxes, wolves, snowy owlsC. very little rainfall, extreme temperaturesD. very low temperatures, very little precipitation

13. What biome has a long dry season and short rainy season, contains many grasses and few trees?

A. DesertB. GrasslandsC. TaigaD. Tundra

14. Which biome is described in the table?

A. desert B. tundra C. temperate forest D. tropical rain forest

15. A student concludes that Organism 1 lives in a temperate forest and Organism 2 lives in a tundra. Which statement BEST describes the student’s conclusion?

A. The student is correct because a temperate forest has grasses, and a tundra has coniferous trees.

B. The student is correct because a temperate forest has a low amount of precipitation, and a tundra has precipitation mainly in the form of snow.

C. The student is incorrect. Organism 1 lives in a taiga because it has dry periods, and Organism 2 lives in a savanna because it has coniferous trees.

D. The student is incorrect. Organism 1 lives in a savanna because it has grasses, and Organism 2 lives in a taiga because it has precipitation mainly in the form of snow.

16. Scientists involved in a field study of a biome produced the graph above. The line represents temperature and the bars represent precipitation. Which of the following is a valid conclusion about the biome?

A. The biome is a rainforest.B. The annual variation in temperature (from high to low) is

about 25°C.C. The biome receives the same amount of rainfall each month.D. The biome is a savanna grassland.

17. Passage The layer of soil above the permafrost is too shallow for plants with deep roots to live. Grasses and shrubs can survive there because they have shallow roots. A sheet of mosses and lichens grows beneath these plants. When the soil above the permafrost thaws, the soil becomes muddy. Muddy soil is an excellent place for insects, such as mosquitoes, to lay eggs. Many birds spend the summer in the tundra to feed on these insects. Tundra animals include caribou, musk oxen, wolves, and other large mammals. Smaller animals, such as lemmings, shrews, and hares, also live in the tundra.

Based on the passage, what is one reason for the lack of trees on the tundra?

A. Trees need more sunlight than is available.B. The roots of trees need more room than is available.C. The soil above the permafrost becomes too muddy for trees.D. Trees need more water than is available.

18. Passage The layer of soil above the permafrost is too shallow for plants with deep roots to live. Grasses and shrubs can survive there because they have shallow roots. A sheet of mosses and lichens grows beneath these plants. When the soil above the permafrost thaws, the soil becomes muddy. Muddy soil is an excellent place for insects, such as mosquitoes, to lay eggs. Many birds spend the summer in the tundra to feed on these insects. Tundra animals include caribou, musk oxen, wolves, and other large mammals. Smaller animals, such as lemmings, shrews, and hares, also live in the tundra.

Based on the passage, which of the following statements is a fact?

A. Muddy soil is an excellent place for mosses and lichens to grow.B. Birds fly north to reach the tundra in the summer.C. Caribou and oxen are some of the large mammals that live in the tundra.D. The tundra is a beautiful biome that is home to diverse communities.

19. Which of the following biomes is represented on the above map?

A. TaigaB. DesertC. Temperate Deciduous ForestD. Grassland

20. Which of the following biomes is represented on the above map?

A. Savanna GrasslandB. Temperate Deciduous ForestC. Tropical Rain ForestD. Taiga

21. Which biome would you find trees that shed their leaves in the fall? This biome has oak trees, deer, and squirrels. This biome has 4 seasons; spring, summer, fall, and winter. Moderate temperatures.

A. Tropical Rain ForestB. Temperate Deciduous ForestC. Taiga (Coniferous Forest)D. Savanna Grassland

22. Which biome consists of evergreen trees with leaves shaped like needles. This biome has long winters and short summers. Most of the precipitation is in the form of snow. Moose and porcupine live here.

A. Tropical Rain ForestB. Temperate Deciduous ForestC. TundraD. Taiga

23. This biome has more plants and animals (biodiversity) than any other land biome. Monkeys live here along with many other animals up in the canopy. It gets 16 times more rainfall than a desert. Plants with wide leaves are found in the understory, collecting what sunlight can get through the thick vegetation above. Which biome is being described.

A. Tropical Rain ForestB. Temperate Deciduous ForestC. TaigaD. Tundra

24. If I wanted to take my family to see zebra, elephants, lions, and a rhino, which biome should I visit?

A. Tropical Rain ForestB. Savanna GrasslandC. TaigaD. Desert

25. In a savanna, the average yearly rainfall is 150 cm. The average yearly rainfall in a desert is 25 cm. If a global climate change causes the savanna’s average yearly rainfall to decrease by 0.5 cm every year, in how many years will the savanna become a desert?

A. 50 years B. 125 years C. 250 years D. 300 years