Term
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Definition
| How much useful output energy is produced from the input energy |
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Term
| What is the structure of the iris |
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Definition
| A circular sheet of muscle that can expand or contract |
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Term
| What is the function of the iris |
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Definition
| Regulates the amount of light entering the eye by expanding or contraction to change the pupil size |
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Term
| What is the structure of the pupil |
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Definition
| Circular hole in the centre of the iris |
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Term
| What is the function of the pupil |
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Definition
| Allows light to pass to the retina |
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Term
| What is the structure of the lens |
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Definition
| A transperent jelly - like biconvex disc |
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Term
| What is the stucture of the cornea |
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Definition
| A transperent disc on the front of the eye |
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Term
| What is the structure of the aqueous humour |
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Definition
| Transperent watery liquid in the front of the eye |
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Term
| What is the function of the aqueous humour |
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Definition
| Supplies nutrients and oxygen to the lens and cornea |
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Term
| What is the structure of the optic nerve |
|
Definition
| Thick nerve at the rear of the retina |
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Term
| What is the function of the optic nerve |
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Definition
| Carries electrical messages to the brain |
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Term
| What is the structure of the ciliary muscle |
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Definition
| Ring of muscle around the lens |
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Term
| What is the structure of the vitrous humour |
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Definition
| A thick, transperent jelly - like contents at the back of the eye |
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Term
| What is the function of the vitreous humour |
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Definition
| Keeps the shape of the eye |
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|
Term
| What is a non - contact force |
|
Definition
| A force that repels from one another |
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Term
|
Definition
| Weight is the amount by which your mass is pulled downwards by gravity |
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|
Term
| What is the law of conservation of matter |
|
Definition
| A principle that matter cannot be created or destroyed in a isolated area |
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Term
| What is force best described as |
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Definition
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Term
| What is force measured in |
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Definition
|
|
Term
| What is the formula for kinetic energy |
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Definition
|
|
Term
| What is the formula for potenial energy |
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Definition
|
|
Term
| What is the formula for force |
|
Definition
|
|
Term
| What is the formula for Power |
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Definition
|
|
Term
| What is the formula for work |
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Definition
|
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Term
|
Definition
| Contact force is when objects make contact with one another. They exert a force on one another |
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Term
| What is the function of the ciliary muscle |
|
Definition
| Changes the shape of the lens to llow focusing on near or far objects |
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Term
| What is the function of the cornea |
|
Definition
| Allows light to enter the eye to refract the light so that it can focus on the retina |
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|
Term
| What is the formula for efficiency |
|
Definition
| Useful output energy in joules/input energy in joules |
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Term
|
Definition
| The strength and vitality required for sustained physical and mental activity |
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Term
|
Definition
| A activity involving mental or physical effort done in order to achieve a purpose or activity |
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|
Term
| What are some examples in which energy comes from |
|
Definition
| Nuclear,Hydro, Solar, Chemical, Geothermal, Fossil Fuels |
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|
Term
| How is energy transferred |
|
Definition
| Energy is carried on very small particles such as electrons |
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|
Term
| What are mechanical waves |
|
Definition
| Waves that involve particles and need a medium of travel |
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|
Term
| What are electromagentic waves |
|
Definition
| Waves that don't involve particles and don't need a medium of travel |
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|
Term
| What is the function of the lens |
|
Definition
| Does the fine focusing of light onto the retina |
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|
Term
| What is the structure of the retina |
|
Definition
| Layer of nerve tissue at the back of the eye |
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|
Term
| What is the function of the retina |
|
Definition
| Converts light into eectrical signals and detects light of different frequencies to allow colour vision |
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Term
|
Definition
| The enrgy that is put into the device |
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