Hydrosphere

Front

How much of Earth's water is unavailable for humans to consume due to its high salinity?

Back

97%

Front

Why must humans clean water before using it?

Back

Clear water may contain contaminants that could harm humans

Front

How does the amount of water circulating in the water cycle change?

Back

The amount of water remains constant.

Front

How is freshwater treatment different from wastewater treatment?

Back

Wastewater is treated after use to protect the environment.

Front

Which statement best describes how estuaries are positive environment for animals and plants? Options: They flood regularly destroying organisms' habitat, They provide a safe hatchery full of nutrients and food, They dry up each summer stranding organisms in shallow water, hold high numbers of predators to feed off young organisms.

Back

They provide a safe hatchery full of nutrients and food

Front

How is the intertidal zone different from the open ocean environment?

Back

The intertidal zone's conditions constantly change.

Front

Why is nitrogen gas important to the health of the ocean and its organisms?

Back

It is needed to make amino acids, proteins, and DNA

Front

How does mining on the ocean floor negatively affect the surrounding ecosystems?

Back

High turbidity clog the gills of ocean organisms

Front

How does warmer temperature affect plants living in the ecosystem? Options: holds less solids, allowing plants to grow year round, Holds less gases, making plants to use gas stores in cells, Holds more oxygen, letting plants conduct photosynthesis, Holds more solids, blocks sunlight, and stops photosynthesis

Back

Holds more solids, blocks sunlight, and stops photosynthesis

Front

How can a change in the pH of water affect the ecosystem?

Back

Change in pH affect which biological & chemical process occur