Water Soil Sunlight

Abiotic factors include air, water, soil, sunlight, temperature, and climate.

The availability of water and light influences where life exists on Earth.

Soil and climate have an important influence on the types of organisms that can survive in different environments.

High latitudes and elevations generally have lower average temperatures.

Cycles in Nature

1. Matter is limited on Earth and is recycled through the environment.

2. The water cycle involves evaporation, condensation, and precipitation.

The carbon cycle involves photosynthesis and respiration.

Nitrogen in the form of soil compounds enters plants, which then are consumed by other organisms.

Energy Flow

1. Producers make energy-rich molecules through photosynthesis or chemosynthesis.

2. When organisms feed on other organisms, they obtain matter and energy.

3. Matter can be recycled, but energy cannot.

4. Food webs are models of the complex feeding relationships in communities.

5. Available energy decreases as you go to higher feeding levels in an energy pyramid.

This diagram represents photosynthesis in a leaf. Match each letter with one of the following terms: light, carbon dioxide, or oxygen.

Forests Oxygen Carbon Dioxide

Water vapor

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