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G4 Eye and Light
| Question | Answer |
|---|---|
| What is a structure? | What something looks like, or what parts it has. |
| What is a function? | What something does. |
| What is the function of the cornea? | Protects the eye and helps to focus light into the eye. |
| What is the function of the lens? | Helps to focus light onto the retina. |
| What is the function of the pupil? | Adjusts the amount of light that enters the eye. |
| What is the function of the iris? | It controls the size of the pupil which in turn controls the amount of light that enters the eye. |
| What is the function of the retina? | It detects light and changes it into a signal that is sent to the brain. |
| What is the function of the optic nerve? | It is the pathway the electrical signal (created by the retina) follows to the brain. |
| What is the main function of the eye? | To gather, focus, and transmit light through a lens to create an image of the surrounding environment. |
| How do eyes help animals to survive? | Vision helps animals to see predators, prey, environment, friends, and shelter that can help them to survive. |
| Why do some people have blurry vision? | The eye is too long or too short so the focused image is not actually on the retina. |
| How can we correct blurry vision? | Glasses or contacts. |
| How does the pupil change when it is dark? | The pupil of the eye will get large. |
| Why does the pupil change when it is dark? | The pupil gets bigger to let more light into the eye. |
| How does the pupil change when it is very bright? | The pupil of the eye will get small. |
| What are the four conditions we need to be able to see? | Light, objects, eye, and direct path between the light and object. |
| If it was completely dark, like in a cave without lights, would you be able to see? | No. |
| Where does the light enter the eye? | Light enters the eye through the pupil. |
| How does the iris / pupil react to the light? | A brighter light means that the pupil will be smaller. |
| How does the retina react to light? | The retina changes light into a signal to be sent to the brain. |
| If we were to see the image on the back of the eye, what would it look like? | upside-down due to the refraction of the lens. |
| In order for us to see an object, light must _______________ off the object. | reflect |
| In order for us to see an object, the lens ___________ the image on to the retina. | refracts |
| What happens when light is reflected from an object? | Light bounces off. |
| What happens when light is refracted through an object? | Light bends as it goes through a different substance. |
| What are photoreceptors? | Cells in the retina that are sensitive to light. |
| Where are photoreceptors found? | In the retina |
| What is the function of photoreceptors? | They turn light into a signal in order to send information to the brain. |
| What is a perception? | It is how our brain interprets information from our senses. |
| What is an optical illusion? | An image or situation we perceive differently than what is really present. |
| What structure is pathway from the eye to the brain to the body when we react to something? | the nerves or nervous system |
Created by:
Prosenteach
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