Worksheets1st Semester Review part 2
Total questions: 14
Worksheet time: 9mins
Wildfires can be one of the most destructive forces on our planet. Millions of acres of forest lands are lost annually as a result. Which of the following is NOT a way in which wildfires can affect this type of ecosystem?
encourages new growth for selected plant life
loss of habitat for animals
aids in preventing soil erosion
depletion of beneficial minerals
Hurricanes start as a tropical depression, then develop into tropical storms. Hurricane winds blow in a spiral around a calm center called an eye. The eye can be up to 30 miles wide, and the storm can be 400 miles in diameter. What positive impact could a hurricane have on an ecosystem?
Defoliating tree canopies and uprooting trees
Flooding triggers mudslides or landslides
Promoting seed scatter of many plant species
Stabilizing plants on beaches and dunes are lost
In the Texas Panhandle, the Palo Duro Canyon was formed by the Red River. What will happen to the canyon in the future?
Due to the deposition of sediments, it will fill in and form a plain over time.
Due to agents of erosion, it will not have any change over time.
Due to the deposition of sediments, it will start to narrow overtime.
Due to water and wind erosion, it will continue to widen over time.
Which action would not speed up erosion in a Texas ecosystem?
Acid Rain
Large Waves
Flash Flooding
High Winds
Primary succession occurs when pioneer species move into an area that has no plants. Which organism are common pioneer species?
Mosses & lichens that can grow on rocky surfaces
Conifer trees & tall grasses w/ roots that loosen the soil
Grasses & weeds that arrive as seeds carried by the wind & then germinate in rich soil
Vines & shrubs that help prevent the erosion of shallow soil
Both primary secondary succession begin w/ pioneer species that...
invade the area so that new organisms cannot be established
modify the area and allow larger and more complex organisms to appear
use up all the existing resources and prevent establishment of non-native organisms
change the area and make it safer from predatory organisms
During primary ecological succession, the initial formation of soil helps establish —
mushrooms
shrubs
grasses
trees
Earth is covered by what type of biome more than any other?
grassland
tundra
marine
taiga
The seventh graders are investigating the animals that inhabit their school yard.What piece of laboratory equipment would best be used to measure the length of an earthworm?
digital scale
metric ruler
graduated cylinder
forceps
Which type of biome consists of moderate precipitation, cold winters and warm summers, and trees that drop their leaves?
taiga
tundra
tropical rainforest
temperate deciduous forest
Which is a biome with low annual rainfall and dominated by grasses?
tropical rainforest
grassland
taiga
tundra
Tropical rain forests have the greatest biodiversity of any type of land ecosystem. How does biodiversity contribute to the sustainability of an ecosystem?
The presence of a variety of herbivore species that can feed on a large number of different producer species helps ensure abundant prey for predators in the ecosystem.
Greater genetic variation within species makes it more likely that some individuals will survive a disease outbreak.
The presence of more species with different adaptations makes it more likely that some organisms will survive an ecological disaster.
All of the above
Which ecosystem would be more likely to survive if a disease killed the grasses?
The grassland ecosystem, because several predators compete for food
The forest ecosystem, because it has three top predators
The forest ecosystem, because most of the animals can eat other organisms
The grassland ecosystem, because it has many herbivores
Which stages represent the effects of positive & negative geotropism?
B & A
C & D
A & B
B & C
