MP3 4 Weeks Review

How do organisms in an ecosystem depend on and compete for biotic and abiotic factors?

• Organisms only depend on food and water

• Organisms depend on both living and non-living things, such as food, water, sunlight, and space.

• Organisms only rely on food as a resource

• Organisms do not depend on biotic and abitoic

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Compare and contrast primary and secondary ecological succession. How do they affect biodiversity?

• primary succession occurs in previously inhabited areas, while secondary succession occurs in areas with no prior life.

• primary and secondary succession are identical processes with no differences in their effects on biodiversity

• Primary succession begins on bare rock or newly formed land, while secondary succession occurs in disturbed areas with existing soil; both processes generally increase biodiversity over time.

• Primary succession decreases biodiversity, while secondary succession always results in a return to the exact pre-disturbance ecosystem.

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Which best describes how biodiversity contributes to the stability and sustainability of an ecosystem.

• High biodiversity decreases ecosystem stability by creating competition between species

• Biodiversity has no impact on ecosystem stability or sustainability

• Biodiversity enhances ecosystem stability and sustainability by providing resilience to environmental changes

• Biodiversity only affects the how an ecosystem looks but has no functional importance.

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Explain how human activities impact ocean systems and describe our dependence on them.

• Human activities have no significant impact on ocean systems, and we are not dependent on them.

• Human activities such as overfishing, pollution, and climate change negatively impact ocean systems; we depend on oceans for food, climate regulation, and oxygen production

• Human activities only positively impact ocean systems, and our dependence on them is minimal.

• Oceans are too vast to be affected by human activities, but we depend on them for food, recreation, oil production, and transportation

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Which of the following statements on how natural events and human activities influence climate are accurate? (select 2)

• natural events influence climate more than human activities

• volcanoes and meteors can eject large amounts of dust into the atmosphere, blocking sunlight and lowering temperatures on the surface

• the building of cities and roads results in lowered temperatures and reduced carbon emissions

• Deforestation increases carbon gases in the atmosphere and increases temperatures in the long term

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Which statements are true regarding the carbon cycle? (select 2)

• The carbon cycle only involves producers(plants) using photosynthesis to obtain carbon dioxide from the atmosphere

• The carbon cycle is a linear process that moves carbon from the atmosphere to the ocean and stops there

• The carbon cycle moves carbon between the atmosphere, biosphere, hydrosphere, and lithosphere

• The carbon cycle involves processes like photosynthesis, respiration, decomposition, and combustion

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__________ factors are living components of an ecosystem, while __________ factors are non-living components.

__________ succession occurs in areas with no previous ecosystem, while __________ succession occurs in areas where an ecosystem previously existed.

Natural sources of greenhouse gases include __________ and __________.

Human activities that contribute to climate change include __________ and __________.

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