Light changes direction when it goes from one surface to another
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How long does it take for light to get from the sun to earth?
8.5 minutes
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What is the light ray going to the object called?
Incidence ray
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One similarity and difference between pinhole and normal cameras?
Both see light, both camera, you can't focus pinhole or see colour or produce their own light. Normal cameras are a lot more expensive.
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Which way does the ray ben in refraction?
Towards the normal
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Name the colours in order of the rainbow
Red orange yellow green blue indigo violet
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what colour does litmus turn for acids and alkalis?
acids- red alkalis- blue
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Give an example of a corrosive substance
concentrated sulphuric acid
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Give an example of when neutralisation is needed
Dealing with insects and wasp stings, keeping foods at the right ph, controlling indigestion, cleaning our teeth
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Give an example of a strong acid and a weak alkali
acid- sulphuric acid alkali- wet washing powder
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Name the seven life processes
Movement, respiration, sensitivity, growth, reproduction, excretion and nutrition
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Name three types of microbes in size order
Viruses, bacteria, fungi
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What is the word equation for fermentation?
glucose- carbon dioxide + ethanol +(energy)
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Name three ways diseases are spread
mother to child, person to person, touching, sneezing, animals, from the air
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What ways does our body stop us from getting ill?
scabs, mucus, white blood cells, stomach acid, skin
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what ways can we stop disease from spreading?
disposing of sewage, adding chlorine to water, drying, freezing or refrigerating foods, pasteurising milk, using disinfectants and soap, immunising people
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Name some properties of metals?
Good conductors of heat and electricity, shiny, solids, left side of the periodic table, malleable, ductile, sometimes magnetic
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What is an alloy and give an example?
An alloy is a mixture of two or more metals, or a metal and another substance such as carbon. Eg. brass- copper and zinc
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What is the word equation for rust?
iron+ oxygen- iron oxide
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What substance is oxygen dissolved in, in the blood?
Haemoglobin
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What order does oxygen go through the lungs in?
trachea- bronchus- alveoli- air sacs
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What carries blood away from the heat/ to the heart?
Veins carry de-oxygenated blood and go to th
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Other cards in this set
Card 2
Front
What happens in refraction?
Back
Light changes direction when it goes from one surface to another
Card 3
Front
How long does it take for light to get from the sun to earth?
Back
Card 4
Front
What is the light ray going to the object called?
Back
Card 5
Front
One similarity and difference between pinhole and normal cameras?
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