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grade 7 bio test
Interactions in the enviroment
| Question | Answer |
|---|---|
| the five things every living thing needs? | air,water,sunlight,ideal temperture range and food. |
| what is a detrivore? | an organism that feeds on large parts of decaying plants and anilmals. |
| examples of a detrivore | earthworms, many types of beetles, some sea birds. |
| what is a decomposer | an organism that consumes and breaks down dead organisms or waste matter so they can be reused in a ecosystem. |
| what are decomposer important | they break down complex chemicals into simpler substances that other organims can use as food |
| examples of decomposers | bacteria and fungi |
| what are producers | an organism that contains chlorophyll and is able to make it's own food |
| what is cholorophyll | it is a green substance that allows plants to capture from the sun |
| what is photosynthesis | photo synthesis describes the process where plants use the sun's energy to produce a high-energy food called sugar. |
| what is the written word equation for photosynthesis. | carbon dixode+water+sun's energy=sugar(food for plant)+oxygen |
| What is a consumer | an organism that cannot produce it's own food energy from sunlight and therefore it relies on other organisms to consume for food in order to get captured energy. |
| what are the types of consumers | herbivores, carnivores,omnivores and scavengers |
| examples of each type of consumer. | herbivores e.g. deer,beaver,carnivores e.g.osprey,wolf,bass,omnivores e.g. racoons, bears, humans and scavengers e.g. coyote, ravens vultures. |
| what is a food chain. | an organizing system that shows a feeding pathway. |
| what is a food web | an orgnizing system that is made up of of many food chains |
| example of a food chain. | dandelion-aphid-ladybug-robin-hawk |
| three types of biotic interactions | mutalism,predation,competeion. |
| example of competetion | frogs compete for the nutrients in a pond. |
| example of mutalism | a bee gets the nectar from a flower and the bee pollunates flowers |
| defnition of biotic element | any living thing found in the environment. |
| definition of organism | a living thing |
| micro organism | a living thing that can only be viewed with the help of a microscope. |
| species | a group of similar organisms that can mate and reproduce the same type of organism. |
| community | a group of populations of different species in a given area. |
| population | a group of organisms of the same species that are in a given area. |
| abiotic element | any non-living component of the enviroment |
| ecosystem | the network of interactions that links the living and non-living componenets of an enviroment. |
| ecology | the study of relationships between organims and abiotic elements. |
| habitiat | an enviromen that a organism lives. |
| nutreint | a substance that a an organism needs to grow and mantain it's body |
| what is competetion | competeion is when more than organism tries to obtain the same basic resources. One organism usually loses and one organism usually wins |
| what is the importance of competetion | competetion controls the amount of populations of species on earth |
| what is predation | predation is when a predator will hunt and eat the prey. in predation one organism wins and the other loses |
| what is the predator prey cycle. | the predator prey cycle is when the predator population starts to rise the prey population drops and then the predator population drops and then the prey population rises and then the predator population rises again and this cycle almost never stops. |
| what is mutalism | interactions between two indvidual species that benefits both of those invidual species |
Created by:
akwok
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