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science revision LW
| Question | Answer |
|---|---|
| what is the difference between a open and closed switch? | open switch: a circuit with out a break in it. electricity can not in an open circuit. closed switch: a circuit with out a break electricity can flow in a closed circuit. |
| what is the difference between a conductor and insulator? | conductor: a materiel that allows electricity to flow through it eg= metal. Insulator: a material that does not allows electricity to flow through it e.g.: plastic. |
| what is current? | current: the measure of the number of electrons flowing through a circuit. |
| what is a series circuit? | series circuit: a circuit with the components joined one after the other in a single continuous loop. |
| what is voltage? | voltage: a measure of the amount of electrical energy used in a circuit. |
| why are non metals insulators? | the electrons inside insulators are strongly connected to the nucleus if the atoms and cannot move easily. |
| what is an ecosystem? | ecosystem is: a system of living and non-living things that interact and depend upon each other. |
| what does abiotic mean? | abiotic mean: describes the non-living things in an ecosystem. |
| define the terms environment and habitat. | environment is: decribes the living and non-living thing that effects organisms in a particular place;decribes the sourroungings of living things. habitat is: the place where an organism lives. |
| what are producers? | producers are: an organism such as a plant that uses photosynthesis to make its own food from the sun's enegy. |
| what are consumers? | consumers are: an organism that relies on other organism for its food. |
| what does biodegrable mean? | biodegrable mean: decribes substances that can be broken down easily in the environment. |
| what does competition mean? | competition mean: the fight between living things for the same resource in the environment. |
| what is a predator? | predator is: an animal that hunts other animals for food. |
| what is a prey? | prey is: an animal that is hunted by other animals for food. |
| explain the differnce between perennial and ephemeral plants. | perennial is: a plant with lifecycle of more than two years. ephemeral is: a plant with a very short life cycle,which springs up after rain. |
| what is symbiosis? | symbiosis is: a very close relationship between two organims of different species.it may benefit or harm one of the partners. |
| what is mutualism? | mutualism is:a relationship between two different organisms in which both benefit. |
| what is erosion? | erosion is:the movement of weathered rock or soil from one place to anther by wind or water. |
| what is a pollination? | pollination is: the process of transferring pollen from one plant to another. |
| what is greenhouse effect? | greenhouse effect is: a natural effects of the earth atmosphere trapping heat tokeep the earth's temperature stable. |
| what is endangered species? | endangered species is: an animal or plant that is under the threat of extinction. the biliby is one of many endangered australian mammals. |
Created by:
Lwassouf
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