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Science - Biology

Grade 9

Food chains Shows the feeding relationships among species in an ecosystem
1st trophic level Producers (autotrophs)
2nd trophic level Primary Consumers (herbivores)
3rd trophic level Secondary consumers (carnivore)
4th trophic level Tertiary consumer (carnivore)
Trophic level Describes the level of an organism in a food chain
Food Webs A series of interconnecting food chains
Identify 2 factors that have changed the relationship between people and their environment and explain how they have resulted in the production of pollution. 1. Deforestation: chopping down trees gets rid of animal habitat/wood industries make a ton of pollution when producing things 2. Burning fossil fuels: burning fossil fuels releases carbon dioxide in the air, causing pollution/fossil fuels limited supply
Abiotic factor important to both terrestrial and aquatic ecosystem. Temperature: Global warming changes the temperature. When humans pollute the air with carbon dioxide (Factories) it can affect other organisms because they are not used to it. Industries release heated waste into aquatic ecosystems which can kill organism
Abiotic factor important to both terrestrial and aquatic ecosystem. Light Availability: humans dumping in the ocean can reduce light availability because the trash can block the light coming in from the sun. Cutting down trees removes shade and more organisms are exposed to light.
Abiotic factor important to both terrestrial and aquatic ecosystem. Nutrient Availability: Farming can either increase or decrease nutrient levels in soil. Algal blooms can happen when nutrient runoff increases the nutrient content.
Describe one way carbon can get from plants to animals and back. Carbon in plants is consumed when animals eat them. When animals excrete, it is called decomposition which releases carbon into the soil, back to the plants.
Explain how the products of photosynthesis are the reactants of cellular respiration. Photosynthesis is when the suns energy is converted into energy, while cellular respiration is when the energy already provided is for life functions
Explain why some pesticides cause bioamplification whereas others do not. Bioamplification: The increase of concentration the pesticide has within the body of the organism over time. Some pesticides are water soluble and don’t cause bioamplification. Some are fat soluble which dissolve in fatty tissue and stay in the body.
Created by: oconsoli1010



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