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2 only those that show the best f are allowed to

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2)Only those that show the best F _ _ _ _ _ _ _are allowed to breed.3)Racing pigeons have been developed by selecting the F _ _ _ _ _ _ birds.4)Wolfhounds have been developed by selecting the T _ _ _ _ _ _dogs.5)E _ _ _ _ _ _ _ _means how plants and animals have slowly changed.6)Natural S _ _ _ _ _ _ _ _causes evolution.wolf-like ancestorsmallest dogsbred togethertallest dogsbred togetherfastest dogsbred together
KS3 Science Revision Worksheets Special EditionP. Hill, Beaver Educational Resources 2000.Registered toHampton Community College. TW12 3HB.Environmental conditionWhy it is important for survivalTemperatureThis affects the chemical reactions inside the cells ofliving organisms. When it is cold organisms slow down.LightPlants need light to make food by photosynthesis.Animals need the food that plants make.WaterWater is needed to dissolve chemicals for transport andso that chemical reactions can take place.OxygenThis is needed so that energy can be released inside thecells by respiration. There is plenty of oxygen in the airbut it may be in short supply in water, soil or mud.Name ………………………………………W.S.32.A place to live.The place where a plant or animal lives is called its HABITAT. All species have specialfeatures called ADAPTATIONS which help them to survive in their habitats. Forexample a polar bear has a thick coat of fur to protect it from the cold and a camelcan store large amounts of water in its stomach. The table below shows some of theENVIRONMENTAL CONDITIONS that are important for survival.Exercise 1– Join up the organisms below to their correct habitats.sharkbuttercupnewtmonkeyfoxmeadowoceanwoodlandpondjungleExercise 2– Complete the sentences below.1)A __________ is the place where an organism lives.2) An __________ is a special feature that helps an organism to survive.3) An adaptation of a cactus is a thick ______________ outer covering.4) An organism’s surroundings are called its ______________5) _________ is needed for chemical reactions to take place inside cells.environmentadaptationwaterhabitatwaterproof
KS3 Science Revision Worksheets Special EditionP. Hill, Beaver Educational Resources 2000.Registered toHampton Community College. TW12 3HB.Name ………………………………………W.S.33.Changing habitats.The conditions in a habitat are always changing from day to night and from oneseason to the next. Light and temperature increase after sunrise and usually reach apeak at midday. In dry deserts the days are very hot but the nights are cold.Lizards and snakes need to absorb heat from their surroundings to keep theirbodies working quickly.Early morning the lizard basksin the sun to warm its body sothat it can move more quickly.Later in the morningthe lizard is very activeand hunts for food.At midday the temperaturein the desert is too high andthe lizard hides in the shade.

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Term
Winter
Professor
NoProfessor
Tags
Beaver Educational Resources, Hampton Community College, KS3 Science Revision Worksheets

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