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Blue Marble Photograph
What did you observe in this photograph?What do you wonder about?How can 13 million different species of life
exist on Earth?What factors determine whether a species
lives in North America or Africa?This picture greatly influenced the
environmental movement – why might this be so?
Ecosystem
What is an ecosystem? A part of a biome in which abiotic
components interact with biotic componentsAbiotic: non-living components of an
environment Ex: sunlight, soil, moisture/precipitation,
temperatureBiotic: living components/organisms of an
environment Ex: plants, animals, fungi, bacteria
Biosphere
thin layer of air, land and water on or near Earth’s surface in which all living things on Earth exist
Figure 1.3 pg. 9
Biome
Biome: includes large regions that have similar biotic components and abiotic components
8 terrestrial biomes1. Tundra2. Boreal Forest3. Temperate Rainforest4. Deciduous Rainforest5. Grasslands (Temperate and Tropical)6. Desert7. Tropical Rainforest8. Polar Ice (Permanent Ice)
Observing Patterns in World Biomes
Page 11 – Activity 1-1AWork with lab bench partnerWrite down two patterns you see in the distribution
of biomesUse the equator, Tropic of Cancer/Capricorn as
reference points in determining distribution patternsCompare with another lab bench
In a paragraph, provide an explanation for each of these three patterns based on your general knowledge
Distribution of Biomes
Temperature and PrecipitationTwo of the most important abiotic factors that
influence the characteristic of biomes and the distribution of biomes on Earth
Types of precipitation: rainfall, snow, mist
and fogGiant trees you find in the rainforest of BC
would not survive in a hot, dry desert biome
Latitude
•Distance measured in degrees North or South of the Equator
• Equator = 0o
• Two hemispheres
•Affects Temperature and Precipitation
Latitude and Temperature
At Equator – sun shines down almost directly overhead Results in 12 hours of sunlight every day of the
year Results in little fluctuation in temperature
At the tropical zone (between the Tropic of Cancer and the Tropic of Capricorn) Close to the equator, therefore receives more
direct sunlight than further North or South latitudes
Has warmest temperatures
Latitude and Temperature
Temperate Regions and Polar Zones (North or South of the tropical zone) sun rays are at an angle Rays are spread over a greater surface area
which results in the rays being less intense The further away from the equator, the lower
the temperature
Latitude and Precipitation
At Equator Direct sunlight heats the moist air which causes
it to rise (evaporation) The moist air cools in the upper atmosphere
and then falls back to the earth as rain (condensation)
Receives the greatest amount of rainfall
Tropical Zone Similar to the equator, the sunlight is mostly
direct resulting in lots of rainfall
Latitude and Precipitation
Polar Regions Little moisture can be picked up (evaporate)
and carried in cold air so clouds do not readily form
Little precipitation
Temperate Regions Cold air masses from the polar regions collide
with warm moist air masses from the tropics Results in seasonal rainfall patterns
Exit Slip
1. Which biome(s) do you know the most about?
2. Which biome(s) are you most interested in learning about and why?