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29 Cards in this Set
- Front
- Back
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Who needs water?
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all living things
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Your cells are mostly made of
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water
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Water changes temperature more (slowly, quickly) than air.
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slowly
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What fraction/portion of the Earth does water cover?
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3/4
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Where is most of the Earth's water found?
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in the oceans
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Describe saltwater.
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Saltwater has large amounts of dissolved salt in it.
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Describe freshwater.
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Fresh water has little or no dissolved salt in it.
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Most plants and animals that live in ocean water (cannot, can) live in fresh water.
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cannot
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Where can you find running water?
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Running water can be found in streams and rivers.
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Where can you find standing water?
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Standing water can be found in lakes and ponds.
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What is the name of the tiny living things on the surface of the oceans?
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plankton
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Why can't plants grow on the bottom of the ocean?
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Sunlight can not reach the deepest parts of the oceans.
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What do many saltwater animals feed on?
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plankton
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Why can't seaweed grow in deep water?
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Seedweed, like all plants, need sunlight to grow. Sunlight does not reach the deepest parts of oceans.
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--- are like rivers moving through the ocean waters
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Currents
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What are the two main kinds of currents?
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surface and deep
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What are most surface currents caused by?
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wind
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What are most deep currents caused by?
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differences in water temperature
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What do deep currents sometimes bring up to the ocean's surface from the ocean's floor?
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minerals which ocean animals use to grow
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Name a famous warm ocean current which travels near the eastern portion of the United States.
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the Gulf Stream
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Why do most food chains start with plants?
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Most food chains start with plants becuase plants make their own food.
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How do animals get food?
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Animals must eat plants or other animals for their food.
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The cells of all animals are mostly made of ---.
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water
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Describe an environment.
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An environment is a place where plants and animals live.
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The way that different things depend on each other for food is called a food ---.
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chain
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The oxgen in the air on Earth comes from ---.
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plants
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The land areas near a warm ocean current have a --- climate.
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warm
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Why are freshwater environments important?
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Fresh water environments give many animals and plants the water they need to live.
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What are saltwater environments important?
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Saltwater environments provide most of theoxygen that animals and plants need to live.
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