Alanah

__Colloids__

Foam is a mixture of gas and liquid formed by trapping gas bubbles in a liquid. Foam can be ethier solid or liquid and can be used for the following: Froth on a coffee (liquid) chair cushions (solid) Insulation (solid) box padding (solid) Part of wave in the ocean (liquid) In a fire extinguisher. (liquid)

CAN YOU TRUST YOUR SENSES? STUDENT  TASK 1

1. Where does the most bending of the light occur in the eye? The cornea bends light as the first step to making the image on the retina.

2. Describe how the lens works This clear flexible structure makes and image on the  eyes retina and is flexible so it can change shape depending on the focal point

<span style="color: #3aee72; font-family: 'Comic Sans MS',cursive; font-size: 150%;">3. Why do we squint when exposed to bright light? <span style="color: #3aee72; font-family: 'Comic Sans MS',cursive; font-size: 150%;">we squint because bright light makes it harder to focus better

<span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 140%;">4. Which parts of the eye are involved in focusing? <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 140%;">the iris, the lens and the retina

<span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 140%;">5. Discuss the implications of losing one eye? <span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 140%;">Losing and eye means that you don't have all you vision <span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 140%;"> try look at something then cover one eye see the difference

<span style="color: #00ff53; font-family: 'Comic Sans MS',cursive; font-size: 130%;">STUDENT TASK 2 <span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Discuss: Visual impairment <span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Visual impairment is when one or more parts <span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 130%;">of the eye or seeing part of the brain is damaged <span style="color: #00ffff; font-family: 'Comic Sans MS',cursive; font-size: 130%;">or diseased causing partial or total loss of vision.

<span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 130%; vertical-align: super;">Do you know anyone who wears glasses or contacts? <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 130%; vertical-align: super;">Why? How do glass or contacts help? <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 130%; vertical-align: super;">Both my parents wear glasses. My mum multi-focal <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 130%; vertical-align: super;">glass so she can she things closer up and further <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 130%; vertical-align: super;"> away with the same pair. My dad is short sighted <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 130%; vertical-align: super;">so he wears glasses to focus on close up objects.

<span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Are there other solutions for people with visual impairments? <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 130%;">If you don't want wear glasses you can wear contact lenses <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 130%;">which do the same thing as glasses but sit on top of your eyes. <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Use the resource from the last section to find out about <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 130%;"> visual impairments

<span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;">-describe two visual impairments <span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;">Cataracts- The lens of the eye is usually clear <span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;">if you have Cataracts the lens clouds and blocks <span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;"> light making seeing harder.

<span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;">Macular degeneration- the deterioration of the macular, the <span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;">most sensitive part of the retina, leading to loss <span style="color: #9dff00; font-family: 'Comic Sans MS',cursive; font-size: 140%;">of central vision.

<span style="color: #00ff53; font-family: 'Comic Sans MS',cursive; font-size: 130%;"> -describe some possible solutions. <span style="color: #00ff53; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Cataracts- Using laser surgery that remove the clouding. <span style="color: #00ff53; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Macular degeneration can't be cured. <span style="color: #ff00ff; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Fred Hollows media type="youtube" key="VaxX-PfvImE?fs=1" height="385" width="480" align="center"