7th Grade Science Fall Semester Exam Study

Guide•Photosynthesis•Flow of Energy in an ecosystem•Work and No Work •Watershed•Biodiversity•Ecological Succession

7.5A Recognize that radiant energy from the Sun is transformed into chemical energy through the process of photosynthesis.

• Draw a diagram to illustrate the process of photosynthesis• Label the components of the process – include

energy transformation

7.5A Recognize that radiant energy from the Sun is transformed into chemical energy through the process of photosynthesis.

• In what ways is energy transformed within the process of photosynthesis?

Word Equation:Six molecules of water plus six molecules of carbon dioxide, using light (radiant) energy and chlorophyll, produce one molecule of sugar (chemical energy) plus six molecules of oxygen.

7.5C Diagram the flow of energy through living systems, including food chains, food webs, and energy pyramids.

• Draw and label the flow of energy in a food web and food chain.

7.5C Diagram the flow of energy through living systems, including food chains, food webs, and energy pyramids.• Define consumer, producer, and

decomposer

7.5C Diagram the flow of energy through living systems, including food chains, food webs, and energy pyramids.• How does a food chain relate to an

energy pyramid?

7.7A Contrast situations where work is done with different amounts of force to situations where no work is done such as moving a box with a ramp and without a ramp, or standing still.• Define force

7.7A Contrast situations where work is done with different amounts of force to situations where no work is done such as moving a box with a ramp and without a ramp, or standing still.

• Define work

• What is the formula for work?• Understand how to solve problems

7.8C Model the effects of human activity on groundwater and surface water in a watershed• Define groundwater

Water that fills the cracks and spaces in underground soil and rock layers.

7.8C Model the effects of human activity on groundwater and surface water in a watershed

• Define surface water

The water found on Earth’ssurface in places likelakes, rivers, reservoirs,and the ocean

7.8C Model the effects of human activity on groundwater and surface water in a watershed• Define watershed

http://www.montgomerycountymd.gov/dep/water/watershed.htmlWhat is a watershed?

A Watershed is an area of land where all of the water that is under it, or drains off of it collects into the same place (e.g. The River).

https://www.youtube.com/watch?v=f63pwrMXkV4

7.8C Model the effects of human activity on groundwater and surface water in a watershed

Click icon to add pictureWater Conservation:• Any beneficial

reduction in water use, loss or waste

• Water management practices that improve the use of water resources to benefit people or the environment.

7.8C Model the effects of human activity on groundwater and surface water in a watershed

7.8C Model the effects of human activity on groundwater and surface water in a watershed

7.8C Model the effects of human activity on groundwater and surface water in a watershed

7.8C Model the effects of human activity on groundwater and surface water in a watershed

7.10B Describe how biodiversity contributes to the sustainability of an ecosystem

Define EcosystemAn ecosystem includes all of the living things in a given area, interacting with each other, and also with their non-living environments

Living – Biotic components (plants, animals and organisms)

Nonliving – Abiotic components (weather, earth, sun, soil, climate, atmosphere).

Pond Ecosystem

7.10B Describe how biodiversity contributes to the sustainability of an ecosystem

• Define biodiversity

The variety of species that live in an ecosystem

• How does diversity (biodiversity) affect ecosystems?

Biodiversity allows for ecosystems to adjust to disturbances like extreme fires and floods.

7.10B Describe how biodiversity contributes to the sustainability of an ecosystem

• How different environments support varieties of

organisms

Biomes• How Do Environments Support Populations? The place where an organism lives is called its habitat. The kind of soil, amount of water, climate, and kinds of plants determine which organisms can live in a habitat. An environment supports a population by providing all the necessary conditions for organisms to survive, such as food, water, and space. A small habitat is called a microhabitat.