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158 Cards in this Set
- Front
- Back
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which side of the heart is thinner ?
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the right
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which side is thicker
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the left
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what does the left side do?
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the leftside pumps to the body
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what does the right side do?
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pumps to the lungs
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why are the lungs perfect for absorbing gases
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they have a big surface area
they are moist they have good blood supply |
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what happens to the oxygen when we inhale air
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the oxygen passes into the blood in the alveoli ( airsacs)
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what does carbon dioxide do?
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carbon dioxide is a waste product of respiration so in the lungs it passes out of the blood and is breathed out
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what happens when you breathe in
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ribs pull up and out and your diaphragm pulls down to make the volume bigger
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what happens when you breathe out?
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your muscles relax and go in and your diaphragm goes up and makes the volume smaller
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how much oxygen is entering the body
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21%
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carbon dioxide
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0.04
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nitrogen
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78%
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water vapour
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varies
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other
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1%
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how much of oxygen when leaving the body
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17%
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carbon dioxide
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4%
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nitrogen
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78%
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water vapour
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high
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other
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1%
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why is there less oxygen when exhaling?
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because it is used up in the body
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why is carbon dioxide more when exhaled
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because carbon dioxide is produced in the body
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why is nirtrogen the same
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because our body doesnt use nittrogen
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what is repiration
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respriration is the way that cells make energy from food it is a chemical reaction
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what is aerobic respiration
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it is when glucose react with oxygen to release energy
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what does this reaction produces
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it produces carbon dioxide and water
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what transports glucose and oxygen to the cells and takes the products away?
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the blood stream
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is respiration breathing
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no breathing is simply taking air into the lungs
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what is the equation of aerobic respiration
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glucose + oxygen makes carbon dioxide + water + energy
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where is glucose from?
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the digestive system
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where is oxygen from
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the respitory sytem
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what is water and carbon dioxide
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waste products
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what is mrs gren stand for
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Move
Respiration Sensitive Grow Respire Excrete Nutrition |
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what are the best source of energy
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carbohydrates because they have glucose
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what do we use energy for
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movement
to keep warm growth repair |
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what do we measure energy in
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Joules
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what do arteries do?
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arteries carry blood away from the heart
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what do veins do/
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they carry blood to the heart
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what are the three blood vessels
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capillary
vein artery |
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what do the capillaries do
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they carry blood to and from the bodies cells
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what are valves
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valves prevent backflow
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what doesthe artery look like
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the artery has thick outer walls and a thick inner layer of muscle and elastic fibres
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what does the vein look like
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thin on the outside and big on the inside which mean they have a thin layer of muscle and elastic fibres
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what does the capillary look like
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it is one cell thick
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why do we need blood
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blood is the bodys way of transporting substances such as oxygen
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where are red blood cells made in
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red blood cells are made in the bone marrow
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what are blood cells
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blood cells are disk shaped and carry oxygen and carbon dioxide
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what are platelets
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platelets are repair tissues and close wounds both internely and externely they plug over the wound
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what is plasma
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plasma is the substance in which blood cells and platelets are suspended in
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what are plasma made up of?
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90% of water
in organic salts glucose proteins |
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what is the order the blood goes in
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1.the blood travels in the capillary with the oxygen and co2
2. it then reaches the alveoli and ditches the co2 3 it then comes back to the capillary |
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why is the red blood cell the shape that it is
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it is the shape that it is so it maximises surface area and there for can carry more oxygen
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white light is..
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all the colours of the rainbow
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what is another word for all the colours of the rainbow
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full spectrum
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prisms that split light into seperate colours are shaped like
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a triangle
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what are all the colours of the rainbow
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red yellow orange green blue purple indigo
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how can you remember all of the colours easier
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roygbiv
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when pure colours pass through a prism they .....
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cannot get seperated
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how many colours are vegies and fruits
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all the colours but only reflect one colour the rest they absorb
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what happens when light is absorbed
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it is changed to heat
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what are the particles in paint that absorb some colours and reflect others called?
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pigment
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when you mix all the colours of light what colour do you get
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white
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when you mix all the colours of paint
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you get black/ brown
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what colour does an object look when they absorb all or most of the colours of light?
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black
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what colour objects reflect all the colours of light
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white
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what colour absorbs all of the heat from the sun and reflects very little?
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black
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what colour reflects most of the heat and absorbs very little?
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white
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what happens when black objects absorb light
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it gets warm
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what is sound
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tiny movements/vibrations of air
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does sound travel faster in air or in a brick
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in a brick because it has more density than air
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how do we hear
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they bump other particles that bump other particles etc
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which creates longer wave lengths
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low pitch
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how can we tell where the source of sound is located
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by timing it
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how does the whisper dish work
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it collects and focusses the sound and send it to the other dish
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what is it when comething vibrates at its natural frequency
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resonance
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how does the outer ear help you hear
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it collects the sound because its funnelled shaped and sends it to your brain
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what does amplitude mean
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hieght of sound wave
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if its a large amplitude the sound will be...
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large
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what does pitch mean
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similar to frequency
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high pitch has..
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more ammount of shorter waves
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low pitch has
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less ammount of waves that are longer
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frequency
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number of waves travelling past a fixed point
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the more waves you see..
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the higher the frequency and pitch
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wave length
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the distance between two identical points
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echo
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sound reflecting back from a surface
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why is sound able to travel in a solid easier
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because all of the molecules are touching eachother
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the anlge coming to the mirror is called...
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angle of incedence
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the angle being reflected is called
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angle of reflection
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transparent
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clear see through
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opaque
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cannot see through will not allow light through
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translusent
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partically see through
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reflected
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light bounces off and an image can be seenq
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absorbed
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is taken in like water taken up by a sponge
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ray
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a beam of light laser
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transmitted
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allowed to pass through
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what are the properties of light?
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source of energy
travels in a straight line creates shadows |
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how fast does light travel
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300,000 km/s
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how much faster than sound
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1 million faster
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what do you to make a solid to a liquid
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melting
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liquid to gas
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evaporation
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gas to liquid
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condesing
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liquid to solid
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freezing
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more heat, makes more ...
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energy and movement
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how do you know when a substance is pure
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when the phase line is horizontal
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how can you tell a non pure substance
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it has a sloping phase line
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evaporation
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seperating a liquid and a solid by boiling off the liquid
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filteration
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seperates a solid that can dissolve from one that cant
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chromatography
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seperates liquids of different colours
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distillation
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seperates liquids of different boiling points
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what is water's boiling point
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100
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what is waters freezing point
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0
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solution
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a solute that is dissolved in a solvent
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solute
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a substance that is dissolved in a solvent ( solid
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solvent
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a liquid in which chemicals dissovle to make a solution ( water, ethanol,liquid)
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aqueous solution
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solution where a solute is dissovled in water
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non aqueous solution
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solution wher a solute isnt dissolved in water ( ethanol)
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what are the characteristics of a magnet
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made out of iron nickel or cobolt
they have north and south it attracts iron cobolt nickel can reppel othe magnets |
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how do you make a magnet weaker
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heat
drop hammer |
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what is the core made out of
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soft iron
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what are the coils made out of
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copper wire in insulated material
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what does current mean
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a flow of electrons in a wire
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how do you increase the strength of a magnet
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increase the current
bigger core more coils |
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how do you say closed in numbers
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1
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how do you say open in numbers
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0
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what is a complete circuit
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flow of electrical charge and current
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a series circuit
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continous loop with no branches
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parralel circuit
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contains branches with more than one route
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resisters
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resist the flowof current
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what one is type 1 diabeties
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pancreas doesnt release enough insulin
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type 2 diabeties
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body doesnt respond to insulin
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what breaks down carbohydrates
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amylase carbohydrase
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what does amylase break the carbs down to
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sugar
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what breaks sown protein
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protease
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how does protease break the protein down to
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amino acids
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what braks down fat
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lipase
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how much of bread and cerals do you need
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6 plus
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how much of vegies do you need
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5
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how much of dairy do you need
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3
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how much protein do you need
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2
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how much fat and sugar do you need
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small ammounts
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what do you need carbs for
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energy
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what do you need protein for
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growth and repair
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what do you need fat for
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energy to make cell membranes
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what do you need vitamins for
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in small ammount to make body chemicals
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what do you need minerals for
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in small amounts for cells to work properly
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what do you need water for
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chemical reactions and transport
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what do you need fibre for
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to keep bowels working properly
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what is independant variable
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what you change
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what is dependant variable
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what i measure
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how do you make a fire
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heat oxygen fuel
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how do you remove heat
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water
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how do you remove fuel
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fire break
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how do you remove oxygen
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suffocate
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what is the ending of a compund that has two elements
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ide
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what is the ending of a compound that has three or more elements and one of them is oxygen
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ate
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how can you tell there is a chemical reaction
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smell
fizzes colour change volume |
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how many natural elements are there?
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92
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what particle is inside an element
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atoms
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molecules
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hydrogen
nitrogen chlorine bromine |
