On the line provided, indicate whether each statement is true (T) or false (F
__T_ 1. The grassland biome is characterized by a prolonged dry season.
_F__ 2. The taiga biome is found in North America, Asia, and Africa.
__F_ 3. In the desert biome, the rate of precipitation exceeds the rate of evaporation.
__F_ 4. The taiga and a plant cell are both examples of closed systems.
__T_ 5. If the climate changes, the species that are best adapted to the new conditions are most likely to survive.
Match each description in column A with the correct biome in column B. Write the letter for the biome on the line beside the description. There will be one biome left over.
This biome has four distinct seasons. Precipitation is evenly F distributed throughout the year, and droughts are uncommon. ___ 7.
The winters in this biome are long and can last six to nine months. The summers are short and cool. There is less than 25 cm of precipitation per year. E ___ 8.
The ground in this biome completely thaws in the summer. The winters are long and cold. Precipitation averages from 35 to 100 cm per year. The dominant tree-types are conifers. D ___ 9.
This biome receives less than 25 cm of precipitation per year. Evaporation exceeds precipitation. Daytime temperatures are normally very hot. C ___ 10. Rain falls in this biome nearly every day. Temperatures vary little from month to month. A B
tropical rain forest
taiga (northern boreal forest)
temperate deciduous forest
Fill in the Blanks
Complete each sentence with the correct term.
d. mass extinctions e. canopy
Earth’s ____tilt_________ changes from 22.3° to 24.5° to the plane of its orbit around the Sun.
Earth’s biological history includes many examples of ____mass_________ ___________extinctions_________, during which many of the world’s species were wiped out.
In a tropical rain forest, only about 2 percent of the sunlight that falls on the trees of the _____________ reaches the forest floor.
Vultures, rattlesnakes, coyotes, and the Gila monster are animals found in the __Desert___________ biome of southwest United States.
__biomass___________ is the mass of living or once living material per unit area.
Circle the letter for the choice that best completes the statement or answers the question.
Which two factors determine the climate of a region? B
temperature and humidity
temperature and precipitation
precipitation and humidity
altitude and precipitation
The temperature at which water vapour in the atmosphere begins to change from a gas C to a liquid is called the
Chinook winds in winter can result in the death of many trees in southern Alberta. Which statement best explains why this happens? A
Chinook winds lower the humidity in the air, which dries out the trees. (b)
Chinook winds raise the humidity in the air, which dries out the trees. (c)
Chinook winds lower the dew point, which dries out the trees. (d)
Chinook winds raise the dew point, which dries out the trees.
Identify the structural adaptations that help to protect the following tree from heavy A winter snowfalls.
The pyramid shape helps to shed snow.
The “cones” that this tree produces ensure its reproductive success. (c)
The shallow root system absorbs limited precipitation.
This tree loses its leaves every fall.
The American pika is a small mammal that resembles a guinea pig. It spends much of the summer storing grass and other plant matter in underground nests. It eats this stored food during the long winter.This is an example of (a)
a physiological adaptation
a structural adaptation
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