LightLensesEyeballColoursGeneral

Question A single light ray travels in a ___________ line.

Answer 1 – 10 Straight line! (It also moves in waves; you’ll learn more about that in Chemistry and Physics class) later)

Question Light enters this glass block (a prism) and changes direction before exiting the other side. This is an example of …..

Answer 1 – 20 Refraction!

Question Light is a form of radiant energy, like X-Rays, Microwaves, UV light, or infra-red light. _______________ light is the light that we can see!

Answer 1 – 30 Visible light (white light is a good guess.) Bonus (10 points): – What are the colours that make up white light? – Red Orange Yellow Green Indigo Blue Violet R.O.Y.G.B.I.V.!

Question Light bounces off the inside surface of water. This is an example of __________ reflection.

Answer 1 – 40 Internal reflection!

Question How fast does light travel?

Answer 1 – ,000km / second!

Question This is a ______________ lens.

Answer 2 – 10 Concave!

Question This is a _________ lens.

Answer 2 – 20 Convex

Question Light that enters a convex lens moves towards a __________ point, where all the light rays come together!

Answer 2 – 30 Focal point.

Question This type of lens is used in magnifying glasses, microscopes, and our eyeballs!

Answer 2 – 40 Convex lenses.

Question In a concave mirror, why does the image appear to be upside-down? (Draw a diagram on the board!)

Answer 2 – 50 Light that hits the top of the mirror is reflected onto the bottom of the mirror, then into your eye. Light that hits the bottom of the mirror reflects UP, then back out towards your eye… so everything

Question The __________ _______ connects your eyes to your brain.

Answer 3 – 10 The optic nerve connects your eyes to your brain.

Question The colourful part of your eye is called the ______.

Answer 3 – 20 The colourful part of your eye is called the iris.

Question When it’s light or dark outside, your iris can change it’s size, allowing more or less light into the ________. Clue: – The black part at the center of your eye. – Same word to describe students in a classroom.

Answer 3 – 30 Pupil!

Question The focal point of light that enters your eye must perfectly hit the _________ at the back of the eye.

Answer 3 – 40 Retina. Bonus: 20 points… Images that hit your retina are ________ - ______; your brain must flip them right-side up. Upside-down!

Question BONUS SQUARE!! What colour is Mr. Mitchell’s Iris??

Answer 3 – 50 Green!

Question Red paint (pigments) reflects _________ light. A blue ball reflects _______ light.

Answer 4 – 10 Red paint reflects RED light!  That’s what we see! Blue things reflect BLUE light, which is what goes into our eyes, and why we see it as blue!

Question Orange paint reflects ORANGE light. What colours does it ABSORB??!

Answer 4 – 20 Red, (not orange) yellow, green, blue, indigo, and violet!

Question What colours does my white shirt light reflect?

Answer 4 – 30 White objects reflect ALL colours. Depending who you ask, white technically isn’t a colour…

Question What colours of light do BLACK objects reflect?

Answer 4 – 40 TRICK QUESTION! Black objects ABSORB ALL the colours, and reflect nothing. That’s why black clothes are bad to wear on a hot day.

Question When you mix red, green and blue LIGHT (e.x. from glowsticks) what colour light do you get?

Answer 4 – 50 Answer: video! C:\Users\TacoTime\Desktop\Mixing Light - Science Theater 01.mp4 C:\Users\TacoTime\Desktop\Mixing Light - Science Theater 01.mp4 WHITE LIGHT!

Question Are these lines straight or bent?

Answer 5 – 10 They’re straight! It’s an optical illusion! BONUS: EXPLAIN! (20 POINTS) We see with our BRAIN as much as we see with our eyes. The staggered position of the squares makes the lines look like they’re bent.

Question Are squares A and B the same colour, or different? EXPLAIN!

Answer 5 – 20 They’re the SAME colour! The darker / lighter squares that surround them change how our brain sees them, and they seem to be darker or lighter than they really are.

Question Lasers are machines that ________________ light and FOCUS it into a single powerful beam.

Answer 5 – 30 AMPLIFY!  Lasers amplify light, making it more powerful. They FOCUS all the energy into a single beam that travels in ONE DIRECTION, instead of spreading out like light normally does.

Question When you plug in your toaster, or turn on a light-bulb / flashlight, what two things are produced?

Answer 5 – 40 LIGHT and HEAT!  Light is energy that we can see. Heat is energy too, but we can’t see it.

Question Why is PROCESSED FOOD unhealthy? Give 3 reasons.

Answer 5 – 50 It’s usually made with lots of SALT (which is bad for your kidneys and blood pressure), PRESERVATIVES (chemicals!) to keep it from going bad, and has lots of fat, oil and sugar. This makes YOU fat, can give you cancer, and can cause diabetes, heart-attacks, high blood pressure, and other medical problems.