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10 Cards in this Set

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Balanced Diet

Fibre


Carbohydrates


Protein


Water


Calcium


Iron


Vitamins C&D


Fats (saturated and unsaturated)



•A balanced diet contains all the different nutrients in the correct amounts to keep us healthy

Teeth

Canines used for tearing and ripping foodIncisors help bite off and chew pieces of foodMolars help you crush and grind food

Digestive System

Starch -> Sugar


Protein -> Amino Acid


Fat -> Fatty acid & glycerol


Ingestion is taking food into the mouth


Digestion is breaking large insoluble particles into smaller soluble particles which can be absorbed into the bloodstream


Absorption is the body's cells using nutrients


Egestion is the removal of faeces from the body


Peristalsis is a wave of musicale contractions moving food down the oesophagus.


Respiration

Glucose + Oxygen -> Water + Energy + CO2Respiration takes place in every living cell

Smoking

Tar - coats alveoli


Nicotine - irregular heart beat


Carbon Monoxide - stops oxygen being carried by red blood cells


Passive Smoking - the harmful effects of smoking without actually smoking

Forces

Forces can change the shape speed or direction of an objectFriction - Kinetic energy -> Heat energy + sound energyFriction is a force that opposes movement

Electricity

Like charges repel


Unlike charges attract


Charged and uncharted attract


A neutral object has equal numbers of protons and electrons


Electrons are transferred when insulators are charged


Protons have a + charge


Neutrons have a = charge


Electrons have a - charge

Heat

Temp is how hot an object is Heat is a form of energyMatte black objects are the best at absorbing and emitting heat radiationMetals are good heat conductorsNon metals aren't good heat conductors

Physical and Chemical Changes

A physical change can be reversed and doesn't make a new substance


A chemical change cannot be reversed and therefore makes a new substance

Chemicals and Chemical Reactions

Oxygen relights a glowing splint


CO2 turns lime water milky


Hydrogen burns with a squeaky pop


Oxidation is where oxygen is added to a substance


Thermal decomposition is using heat to break down a substance


The chemical name for limestone is Calcium Carbonate


Limestone quarrying can help build more things but causes air pollution