5th Common Assessment

What does biodiversity say about an ecosystem?

• The location of the ecosystem

• The overall size of the ecosystem

• The ability of the ecosystem to survive

• The identity of the organisms that began ecological in the ecosystem

Tropical rain forest have the greatest biodiversity of any type of land ecosystem. How does biodiversity contribute to the sustainability of an ecosystem?

• The presences of more species with different adaptations make it more likely that some organism will survive an ecological disaster.

• Greater genetic variation within species makes it more likely that some individuals will survive a disease outbreak

• 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.

• All of the above

Which ecosystem most likely has the greatest biodiversity, having the highest sustainability?

• A tank that has serval gold fish

• A tundra region that has many penguins

• A pine tree in which different birds live in

• A rain forest that has many different types of plants and animals

How can biodiversity be decreased after a hurricane in an ecosystem?

• Fresh water can increase after a natural disaster

• Plants and animals increase after the hurricane

• The Earth’s plates separate to allow plants to grow

• Resources that plants and animals become unavailable or scarce

What human activity DOES NOT have a negative impact on ground water?

• Recycling motor oil in a nearby body of water

• Putting used batteries in designated containers

• Fertilizing the yard before a severe storm

• Disposing used sealed paint cans in the city landfill

Which statement best describes a watershed?

• Watershed is another term to describe a large river.

• Watershed includes the land drained by a river and smaller streams

• A watershed is a divide separating a river and a local stream

• Watershed describes all water that soaks into the ground

Nitrates are found in fertilizer. Nitrate pollution causes algae to bloom and use available oxygen. This type of pollution is caused by which of the following?

• Urban areas using too much water

• Farms along rivers in a watershed

• Factories pumping chemicals into the water

• Gas stations built on watersheds

How does fertilizer harm groundwater?

• Fertilizer adds more chemicals to groundwater as the soil absorbs it

• Fertilizer increases the chances of the plant absorbing groundwater

• Fertilizer adds more nutrients to the ground water

• Fertilizer makes groundwater taste better

When rocks and land formations are broken down into sediments, this is called-

• Watershed

• Deposition

• Erosion

• Weathering

South Texas has many rivers that carry sediments from farms to the Gulf of Mexico. When sediments are carried from one location to another, this is called-

• Watershed

• Weathering

• Erosion

• Deposition