Environmental Science - CA4 - CCSD

The Earth's water supply is finite. Select all choices which are true because of this fact.

• Water is "cleaned" by the hydrological cycle and returned to Earth.

• There is enough usable water on Earth that humans could never pollute it all.

• Water must be recycled or it will be used up.

• If all freshwater is polluted, humans could use saltwater instead.

Mining impacts the diversity and productivity of an ecosystem by:

• Increasing biodiversity and productivity

• Decreasing biodiversity and productivity

• Having no effect on biodiversity and productivity

• Only affecting productivity, not diversity

A resource that cannot be replaced once it is used up is a —

• non-renewable resource

• renewable resource

• natural resource

• reusable resource

Which resource is renewable?

• Sunlight

• Petroleum

• Coal

• Natural gas

Which resource is renewable and comes from a tree?

• Water

• Wood

• Plastic

• Sunlight

Which resources seen in the above figure are renewable?

• Sun, ocean water, rain, seaweed, tuna fish, ocean breeze, and ocean waves

• Sand, ocean water, minerals, ocean breeze, rocks, tuna fish, and ocean waves

• Ocean minerals, rocks, salt, oil, and tuna fish

• Sand, ocean minerals, rocks, salt, and oil

Rocks, soil, water, and oxygen are all _______ factors in the Sierra Nevada ecosystem of California.

• A. biotic

• B. abiotic

• C. living

• D. unimportant

Which of the following does NOT cause erosion?

• Cutting down acres of trees

• Planting vegetation on a hillside

• Ocean waves hitting the shore

• Severe drought

Which of the following identifies a process that prevents erosion and a process that causes erosion?

• Planting vegetation prevents erosion; water runoff causes erosion.

• Water runoff prevents erosion; planting vegetation causes erosion.

• Wind prevents erosion; planting vegetation causes erosion.

• Planting vegetation causes erosion; wind prevents erosion.

Poor farming techniques could lead to —

• excessive noise pollution

• major forest fires

• soil erosion

• more oxygen production