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7th gr ch 26
Ecosystems
| Question | Answer |
|---|---|
| Succession | natural, gradual changes in the types of species that live in an area. |
| pioneer species | First organisms to grow in new or disturbed area. |
| climax community | a community of plants that is relatively stable and undisturbed and has reached a stage of succession . |
| Biomes | large geographic areas that have similar climates and ecosystems |
| Tundra | A cold, dry, treeless region. |
| taiga | A cold, forest region dominated by cone-bearing evergreen trees. |
| temperate deciduous forests | Usually have four distinct seasons, annual precipitation between 75cm and 150 cm, and climax communities of deciduous trees. |
| temperate rain forest | biome with 200 cm to 400 cm of precipitation each year, average temperatures between 9 C and 12 C, and forests dominated by trees with needlelike leaves. |
| tropical rain forests | most biologically diverse biome, has an average temperature of 25C and receives between 200 cm and 600 cm of precipitation each year. |
| desert | driest biome on Earth with less than 25 cm of rain each year. Has dunes or thin soil with little organic matter, where plants and animals are adapted to survive extreme conditions. |
| grasslands | temperate and tropical regions that receive between 25 cm and 75 cm of precipitation each year and are dominated by climax communities of grasses |
| wetlands | regions that are wet for all or most of the year. |
| ecosystem | community of living things that interact with each other and the environment around them |
| which type of succession involves forming new soil (the soil-building process)? | primary succession |
| which type of succession begins in a place that already has soil and used to have living things around? | secondary succession |
| climate | the average weather in an area over a long period of time |
| What are the two most important climatic factors that affect life in an area? | temperature and precipitation |
| which biome receives little precipitaion but is covered with ice most of the year? | Tundra |
| Which biome is dominated by cone-bearing trees and has mostly snow for precipitation? | Taiga |
| Why are tropical rain forests warm? | They are near the equator |
| How many zones is a rain forest divided into? | four |
| what are the four zones of the rain forest? | Forest floor, understory, canopy, and emergents |
| in which zone of the rain forest would you find the upper parts of trees along with birds, reptiles and mammals? | canopy |
| In which zone of the rain forest do the largest mammals live? | forest floor |
| in which zone of the rain forest would you see the tops of giant trees? | emergents |
| which zone of the rain forest is under the canopy leaves but above the forest floor? | understory |
| Which is the driest biome? | desert |
| due to the extreme dryness and hot and cold temperatures, what are most desert plants able to do? | Store their own water |
| which is the world's largest biome? | Taiga |
| Aquatic | growing or living in water |
| What are some valuable resources that come from wetlands? | fish, shellfish, cranberries, and plants |
| Where are wetlands usually found? | regions that are between landmasses and water |
| About 95% of the water on the surface of the Earth contains what? | high concentrations of various salts |
| What are some freshwater ecosystems? | rivers, streams, lakes, ponds and wetlands |
| Human activities, such as too much lawn fertilizer, can cause what? | pollution of aquatic ecosystems |
| What is the main factor that affects the rising and falling of the tides each day? | The gravitational pull of the moon |
| What is a resource? | something useful or necessary for other living things to survive |
| what is a natural resource? | a resource that comes naturally from the environment |
| what is a renewable resource? | A natural resource that is recycled or replaced constantly by nature |
| nonrenewable resources | natural resources that are used up faster than they can be replaced by nature |
| what are some fossil fuels? | coal, oil, and natural gas |
| are fossil fuels renewable or nonrenewable? | nonrenewable |
| what are the three R's of conservation? | reduce, reuse, recycle |
| what is recycling? | a way of changing something and using it again |
| What does it mean to reduce? | Use less of the natural resources around us |
| what does it mean to reuse? | to use items more than once |
| what is meant by conservation? | To use resources wisely so that we don't use them all up |
| what is meant by preservation? | To avoid using ANY resources so they don't dissapear |
Created by:
MrsFontana