Ecology Review 9th grade

Ecology Review Flashcards for 9th grade finals made with Ai

What is the difference between a community and a population?

A community includes multiple populations of different species, while a population is a group of individuals of the same species.

What are the levels of ecological classification?

Biosphere, Ecosystem, Community, Population, Individual

What is the difference between biotic and abiotic factors?

Biotic factors are living things, while abiotic factors are non-living things.

What are the four global systems and what does each one mean?

Atmosphere (air), Hydrosphere (water), Geosphere (land), Biosphere (living things)

What is the difference between weather and climate?

Weather is the daily condition of the atmosphere, while climate is the average weather conditions in an area over a long period.

What does the unequal heating of Earth’s surface create?

Three climate zones: polar, temperate, and tropical.

Which biome has the most precipitation?

Tropical rainforest.

Which biome has the least amount of precipitation?

Desert.

In what biome do we live?

Temperate Deciduous Forest.

What is the greenhouse effect?

The process where certain gases in the atmosphere trap heat and warm the Earth.

How does burning fossil fuel contribute to global warming?

It increases the concentration of greenhouse gases in the atmosphere, trapping more heat.

What powers all life on Earth?

The Sun.

What are autotrophs and heterotrophs?

Autotrophs are producers that make their own food, while heterotrophs are consumers that obtain energy from other organisms.

What are herbivores, carnivores, omnivores, and detrivores?

Herbivores eat plants, carnivores eat meat, omnivores eat both plants and meat, and detritivores eat dead organic matter.

What is the order of trophic levels in a food chain?

Producers, primary consumers, secondary consumers, tertiary consumers.

What direction does energy travel?

Up the food chain.

Where are decomposers in the food web? Why are they important?

Decomposers are at all levels. They recycle nutrients from dead organisms back into the ecosystem.

What are ecological disturbances?

Events that disrupt the structure and function of an ecosystem.

In an energy pyramid, how much energy is available to the next trophic level?

Approximately 10%.

How do photosynthesis and cellular respiration contribute to the carbon cycle?

Photosynthesis removes carbon dioxide from the atmosphere, while cellular respiration releases carbon dioxide into the atmosphere.

What is growth rate?

The rate at which a population is increasing or decreasing.

What does a positive growth rate mean?

Birth rate is greater than death rate.

What does a negative growth rate mean?

Birth rate is less than death rate.

What does a zero growth rate mean?

Birth rate equals death rate.

What is population density?

The number of individuals per unit area or volume.

What does an age structure diagram compare?

The distribution of different age groups in a population.

What four things contribute to population growth?

Births, immigration, deaths, and emigration.

What is exponential growth? What is logistic growth?

Exponential growth is rapid and unchecked, while logistic growth slows as resources become limited.

What is the difference between a habitat and a niche?

A habitat is where an organism lives, while a niche is the role it plays in the environment.