Because Earth does not get significant inputs of matter from space, its essentially fixed supply of nutrients must continually be recycled to support life.

• True

• False

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NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Less than 3% of Earth's vast water supply is available to humans and other species as fresh water, and most of that is frozen in the glaciers and ice caps.

• True

• False

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NGSS.MS-ESS2-4

The process by which cells are able to convert glucose into usable energy using oxygen is known as photosynthesis.

• True

• False

Lightning is one of the natural mechanisms by which atmospheric nitrogen is converted to ammonia or ammonium ions.

• True

• False

A primary consumer can also be described as a(n) _____.

Choose 2 Answers

• autotroph

• heterotroph

• herbivore

• carnivore

In the accompanying figure of an ecosystem, which components can be categorized as abiotic? (Choose ALL that Apply)

• precipatiation

• fox

• rabbit

• air

• sunlight

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Match the following

• Trophic Level

• A complex network of interconnected food chains

• Heterotroph

• An organism's feeding level within an ecosystem

• Omnivore

• An organism that can use both planta and other animals as food sources

• Autotroph

• Organism that cannot produce its own nutrients

  and gets them by feeding on other organisms or

  their wastes and remains

• Food Web

• An organism that can make the food it needs from inorganic compounds in soil, carbon dioxide, air, water, and sunlight

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Match the following

• Nutrient Cycling

• Uses oxygen to convert glucose and other organic

  molecules back into carbon dioxide and water

• Cellular Respiration

• Process in which solar energy interacts with carbon

  dioxide, water vapor, and other gases in the air; it

  warms the troposphere

• Photosynthesis

• The continuous movement of elements and compounds

  that makeup nutrients through air, water, soil, rock,

  and living organisms

• Anerobic Respiration

• Process that breaks down glucose (or other nutrients) into energy in the absence of oxygen

• Greenhouse Effect

• Process in which producers harness the energy of light to convert inorganic molecules of carbon dioxide and water into organic molecules such as glucose

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The air people breathe resides in the lowermost layer of the atmosphere called the ____.

• troposphere

• stratosphere

• ozone layer

• geosphere

• biosphere

A group of individuals of the same species living in a particular place is a(n) ____.

• ecosystem

• population

• community

• organism

• biosphere