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Assignment Discovery Biomes Videos

Student Objectives


  • Identify the world's major biomes.
  • Study one biome and its key features.
  • Create a map of each biome showing its location and key features.
  • Write a descriptive paragraph about the temperature and climate of the biome.

Materials


  • Elements of Biology: Biomes video
  • Computer with Internet access
  • Print resources such as atlases and encyclopedias
  • Newsprint and markers
  • Large outline of a world map
  • Colored pencils

Procedures


  1. Begin the lesson by having students watch the program entitled Elements of Biology: Biomes. Tell them to focus on the following segments: "Tundra and Taiga," "The Temperate Zone," and "Deserts and Tropics."
  2. After watching, hold a brief discussion about biomes. Make sure students understand that a biome is a major ecological community that includes ecosystems with similar climates and organisms. Then make a class list of the world's major biomes. The list should include the following biomes:
    • tundra
    • taiga
    • deciduous forest
    • grasslands
    • savanna
    • desert
    • tropical forests
  3. Divide students into groups of four or five. Assign each group to one of the seven biomes on the class list, explaining that their task is to create map of a biome that includes the following elements:
    • The biome's location
    • A color-coded system indicating the climate and the vegetation
    • A representation of the animals that live in the biome
  4. Allow enough class time to work on maps. Tell students that they can find outline maps to use on the following Web site: http://www.eduplace.com/ss/maps/. Many reference books have this information. Suggest that they refer to an atlas or an encyclopedia. In addition, students can take a look at the following Web sites for additional information:
  5. After students have completed the maps, tell each group to write a descriptive paragraph about the biome, including such information as climate, average temperature, and unique features.
  6. During the next class, have each group share its map. At the end of each presentation, post the map on the bulletin board so that students can see a visual display of the diversity of biomes in the world.
  7. Conclude the lesson by asking students what they learned about biomes as a result of completing this activity. What do they know now that they didn't know before? Do they have a greater appreciation of the diversity of regions in the world?

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Assessment


Use the following three-point rubric to evaluate students' work during this lesson.
  • 3 points:  Students identified all seven biomes; created an attractive, accurate map in their group; and contributed significantly to the group's accurate, descriptive paragraph.
  • 2 points:  Students identified five of the seven biomes; created a satisfactory map in their group; and contributed to the group's satisfactory paragraph.
  • 1 point:  Students identified fewer than four of the seven biomes; did not work with their group to create a map; and did not contribute to the group's paragraph.

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Vocabulary


biome
Definition: A major ecological community that includes ecosystems with similar climates and organisms
Context: Biomes are based on climate, so similar ones are found in different parts of the world.

deciduous forest
Definition: A biome in eastern North America, Asia, Australia, and Western Europe characterized by moist, temperate climates
Context: A deciduous forest includes trees such as elm, maple, and oak that have leaves that change color in autumn and fall off every winter.

desert
Definition: The driest biome on Earth; arid land with usually sparse vegetation and less than 10 inches of sporadic rainfall annually
Context: Although little rain falls in a desert, a wide array of plants and animals thrive there.

grasslands
Definition: A biome in a temperate climate, including the American Midwest, the pampas in Central South America, and the steppes in central Eurasia
Context: Antelope, bison, and wolves are among the animals that live in grasslands.

savanna
Definition: A biome in tropical latitudes characterized by a long, dry season and grasses and shrubs
Context: Africa has the world's largest savannas, where herds of wildebeest, elephants, and zebras live.

taiga
Definition: A biome just south of the tundra characterized by cold winters, a short growing season, and forests of coniferous trees
Context: The area that separates the tundra from the taiga is known as the tree line.

tropical forest
Definition: A biome characterized by a hot, wet climate found near the equator
Context: Some tropical forests are rain forests, where it rains much of the time; others have a wet and a dry season.

tundra
Definition: A biome in the northernmost parts of world characterized by long winters and short summers
Context: The tundra has permafrost, a hardened layer underneath the topsoil that remains frozen throughout the year.

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Academic Standards


National Academy of Sciences
The National Science Education Standards provide guidelines for teaching science as well as a coherent vision of what it means to be scientifically literate for students in grades K-12. To view the standards, visit this Web site: http://books.nap.edu/html/nses/html/overview.html#content.
This lesson plan addresses the following national standards:
  • Life Science: Matter, energy, and organization of living systems
Mid-continent Research for Education and Learning (McREL)
McREL's Content Knowledge: A Compendium of Standards and Benchmarks for K-12 Education addresses 14 content areas. To view the standards and benchmarks, visithttp://www.mcrel.org/compendium/browse.asp.
This lesson plan addresses the following national standards:
  • Science: Life Sciences ? Understands relationships among organisms and their physical environment
  • Geography ? Understands the concept of regions
  • Language Arts: Viewing ? Uses viewing skills and strategies to understand and interpret visual media; Writing: Uses the general skills and strategies of the writing process, Gathers and uses information for research purposes; Reading: Uses reading skills and strategies to understand and interpret a variety of informational texts

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Presentation on theme: "Aquatic Biomes Science 1206. Video: aquatic biome assignment-discovery-aquatic-biomes-video.htm."— Presentation transcript:

1 Aquatic Biomes Science 1206

2 Video: aquatic biome http://videos.howstuffworks.com/discovery/28105- assignment-discovery-aquatic-biomes-video.htm

3 Marine biomes Marine biomes are divided into two zones. These marine communities are classified based upon depth: 1)Coastal zones: Intertidal (Littoral zone) Neritic zone 2) Open ocean Pelagic zone

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5 Ocean Life Zones photic zone Supports photosynthesis aphotic zone Supports chemosynthesis only

6 Marine Biomes Marine biomes are oceans on the Earth that are interconnected, which contain a salt water environment. They cover more than 70% of the Earth’s surface. Temperatures remain fairly constant in the marine biome, with a variation with latitude. Ocean temperatures vary from 0 degrees in the polar regions to 32 degrees near the equator.

7 The life in the oceans is divided into two main groups: Benthic (bottom dwelling). Pelagic (free floating)

8 Aquatic Biomes of Canada Marine environments, also considered biomes by some ecologists, comprise the: Open ocean -Littoral (shallow water) regions -Benthic (bottom) regions Sandy shores Estuaries (coastal marches)‏ Tidal marshes

9 Intertidal zone (Littoral) ‏ Regulated by the tides caused by gravitational force of the moon. Home to many small species of fish and plant life. This area is covered by water during high tide and uncovered at low tide. Many types of seaweeds live here, along with clams, crabs, mussels, and star fish.

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11 Neritic Zone Includes the shallow waters above the continental shelf, which extends out about 300 km. This zone contains the nutrients carried into oceans and rivers. This zone is shallow so therefore light reaches all the way to the ocean floor. Organisms such as algae, fish, mussels, crabs, barnacles, oysters, worms, and sea cucumbers live here.

12 Open Ocean (Pelagic zone) ‏ Filled with many large animals like sharks and whales. Because the water is deep in the ocean, light cannot reach the bottom so photosynthesis cannot occur.

13 Interesting facts... The evaporation of the marine biome provides most of the Earth’s rainfall, and the ocean’s temperature has a major effect on the world climate and wind patterns. Marine algae supply a substantial portion of the world’s oxygen.

14 Video: freshwater biome http://videos.howstuffworks.com/hsw/23700-the- worlds-biomes-freshwater-video.htm http://www.youtube.com/watch?v=tU2F36Y3AdU&feature=r elated

15 Freshwater Biomes The freshwater biome is comprised of rivers, lakes, ponds, swamps, bogs, etc. The volume of water in this biome is much smaller than that of the marine biome. The temperature variations are larger. Organisms living in fresh water must be able to adapt to a greater seasonal variation than those living in the ocean.

16 Freshwater Biomes Composed of three zones: Littoral Zone Limnetic Zone Profundal Zone

17 Littoral Zone lots of light, warm/cold, oxygen close to shore organisms include waterlillies and sedges

18 Limnetic Zone area of open lake sufficient light and oxygen heat will decrease with depth organisms include plankton and fish

19 Profundal Zone deep area of lake no light, very little oxygen cold water organisms include bacteria and bottom dwelling invertebrates

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21 Importance of plankton Plankton are generally slow moving organisms that cannot swim strongly enough to avoid being carried about by water currents.

22 Most plankton are microscopic. There are two types of plankton: Phytoplankton Zooplankton

23 Phytoplankton Plant plankton, called phytoplankton, usually consist of one-celled plants, such as diatoms and dinoflagellates. Phytoplankton forms the base of the aquatic food webs. They grow using only the sunlight and the minerals in the water (photosynthesis). Therefore, they are considered autotrophs.

24 Zooplankton Zooplankton are animal plankton. They are heterotrophic and feed on phytoplankton.

25 What abiotic factors affect life in aquatic biomes? 1. Water 2. Temperature 3. Latitude

26 What abiotic factors affect life in aquatic biomes? 1. Water: Water is always present in the aquatic biomes unlike in terrestrial biomes.

27 What abiotic factors affect life in aquatic biomes? 2. Temperature (continued): Lakes and ponds show more change than the oceans. Oceans have an effect on the temperature of the land. Without oceans, the temperature of the Earth would vary much more than it does.

28 What abiotic factors affect life in aquatic biomes? 3. Latitude: Water temperature varies from 0 degrees (polar regions) to 32 degrees Celsius (near equator). This variation in latitude affects the kinds of marine life than can survive in what areas of the ocean.

29 Estuaries (coastal marshes) ‏ More productive biome than either the ocean or fresh water water is mostly shallow allowing light to penetrate to the bottom plant life is abundant and varied animal life is abundant

30 Some fish use the estuary as a nursery. When the young are large enough they leave the estuary for the ocean.

31 coastal marsh

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33 Can you identify the sequence of organisms in this marine food web?

34 Sources of Water Pollution Human sewage decaying plant life industrial waste animal wastes runoff fertilizers pesticides Herbicides Detergents

35 How oil enters marine ecosystems? Oil tanker accidents offshore wells spills On-shore oil spills thru drainage pipes

36 Disadvantages of the Oil pollution on Marine Ecosystems (pg.148) ‏ floating oil harms birds: -No longer water proof -They freeze to death can prevent birds and marine mammals from breathing heavy oil sinks and destroys bottom dwellers such as mussels, crabs and oysters. Since bottom dwellers are part of the food chain,oil eventually enters the bodies of birds, fish and humans.

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