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science book

organism a living thing
living things are made out of cells
seven characteristics of living things movement respiration sensitivity feeding excretion reproduction growth
nutrition the way living things get and use their food
respiration the way living things get energy
excretion the getting rid of wastes that are made in cells
growth growth results from cells dividing
reproduction producing new individuals of the same kind
response ability to react to changes in the environment
plants organisms that have a leaf,stem and roots and sometimes a fruit or flower
animals animals are creatures that can have eyes,ears,hair,fur,legs,wings,shell,fins,gills and so on
vertebrates animals that have a backbone
invertebrates animals that don't have a backbone
uses of animals provide food for humans and other animals. keep them as pets which reduces stress.
living things are identified using a a key
cell membrane a skin that surrounds the cell,protects the cell and controls the things that enter and leave the cell
cytoplasm a watery substance containing dissolved substances such as proteins and sugars
nucleus control center of the cell
eyepiece lens magnifies by 10x
objective lenses low power x4 medium power x 10 high power x40
tissue a group of similar cells with the same function e.g muscle
organ many different tissues working together e.g the heart
system group of organs working together e.g circulatory system
food is needed as a source of energy provide material for growth
photosynthesis plants make their own food
water is a excellent solvent allows substances to be transported
Carbohydrates sugar-> provides energy eg. honey,milk starch-> provides energy eg. pasta,bread fibre-> prevents constipation eg. cereals
proteins for growth and repair of cells to make muscle and hair eg. lean meat,eggs
fats provide store of energy for insulation eg. butter,milk,cheese
vitamins vit C-> healthy skin&gums eg. oranges,kiwi lack of vit C causes scurvy Vit D -> build strong bones&teeth eg. milk,yogurt lack of vit D causes rickets
minerals iron-> needed to make red blood cells eg. liver lack of iron cause anaemia calcium->healthy bones&teeth eg. tinned salmon
test for starch iodine
test for glucose benedicts solution
test for protein sodium hydroxide and copper sulfate
test for starch butter
food is measured in kilojoules
food pyramid guideline showing types of food needed each day
digestion breakdown of large insoluble food molecules into small soluble food molecules
enzymes biological catalysts
types of digestion physical and chemical
amylase starch + amylase -> maltose + amylase SUBSTRATE ENZYME PRODUCT ENZYME UNCHANGED
eating food taken into the mouth
absorption digested food is taken into the bloodstream and carried to the cells
digestive system mouth oesophagus stomach small intestine large intestine
Mouth physical digestion by teeth chemical digestion my enzyme
oesophagus carries food from the mouth to the stomach
stomach food is mixed with digestive enzyme and churned
liver produces bile
pancreas produces digestive enzyme
small intestine completes digestion digested food absorbed into bloodstream
large intestine takes water back into bloodstream
incisor cutting and biting food
canine tearing food
pre molar crushing and grinding food
molar crushing and grinding food
Created by: aoife3698