Science Year 8 revision 0.0 / 5 ? AllScinceFunNone Created by: lucrayCreated on: 17-05-15 16:47 What carries blood to the heart/ away from the heart? Veins carry de-oxygenated blood to the heart and arteries carry oxygenated blood away from the heart. 1 of 14 Where does respiration happen? In the mitochondria 2 of 14 What is resistance? How hard it is for electricity to flow 3 of 14 What is electrical current? Tiny particles called electrons flowing through wires. 4 of 14 What is an element? A substance that cannot be split up into anything simpler by chemical reactions 5 of 14 What is a compound? Substances that can be split up into simpler substances. They contain the atoms of two or more element joined together by bonds. 6 of 14 Where does photosynthesis take place? In chloroplasts that contain chlorophyll 7 of 14 what is the name of the holes that let carbon dioxide and oxygen leave/ enter through? Stomata 8 of 14 Name two types of characteristics? Inherited and environmental 9 of 14 What is a hybrid? The off spring when two animals of different species reproduce 10 of 14 How man chromosomes do gamete cells have? Half the amount that the rest of the animal's cells have 11 of 14 What is selective breeding? When a breeder only breeds the animals with a specific quality they want their animal to have 12 of 14 What is genetic modification? Genetic modification is when scientists in labs alter the genes in living organisms or a genes to a different species. 13 of 14 How do you calculate the mean speed? distance travelled/time taken 14 of 14
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