Light Energy
The sun is an example of a __________ light source. A light bulb is an example of a __________ light source.
natural; artificial
Name all of the colours of the rainbow in order.
Red
Orange
Yellow
Green
Blue
Indigo
Violet
List the three words that are used to describe the amount of light that passes through an object.
-translucent
-opaque
Sound energy travels in __________ and makes objects __________.
waves; vibrate
-cornea
-iris
-lens
-optic nerve
-pupil
-retina
-sclera
We can see at night because the stars __________ light, but the moon __________ light from the sun.
emit; reflect
A prism is a block of glass in a triangular prism shape. Draw a triangular prism.
(confirm correct drawing)
Refraction will occur when the light passes from one __________ to another, when the light rays on an angle.
state of matter (medium)
What range of pitches can humans hear?
20 - 20 000 Hz
Plants use sunlight to make their food. What is this process called?
photosynthesis
Describe two ways that light travels.
- in a straight line
- in waves
When we see white, it is because all colours are being __________. When we see black, it is because all colours are being __________. When we see one colour, like green, it is because...__________.
reflected; absorbed; green is reflected/all other colours are absorbed
Name two materials that are:
-transparent
-translucent
-opaque
*various answers*
What would the volume of the normal speaking voice be measured at?
60 dB
The scientific name for the southern lights is the __________ __________.
-Aurora Borealis
-Aurora Australis
What is the term for a plant or animal that emit their own light?
bioluminescent
Each colour of the rainbow has a different __________ and __________ at a different angle.
wavelength; refracts
Describe the difference between reflection and refraction.
reflection: the bouncing of light
refraction: the bending of light
Sound with a frequency of more than 20 000 Hz is called __________.
ultrasound
Name the three tiny bones in your ears.
DOUBLE POINTS if you can also give me their scientific names.
hammer; anvil; stirrup
***malleus, incus, stapes***
Visible light is the only part of the __________ __________ that we can see.
electromagnetic spectrum
Describe how a rainbow is formed in three steps.
-white light refracts as it enters the raindrop
-white light reflects off the back of the raindrop
-white light refracts again as it leaves the raindrop
When light passes THROUGH an object, it is called __________. When light goes INTO an object it is called __________.
Draw the following sound waves:
-high pitch, soft volume
-low pitch, loud volume
-low pitch, soft volume
-high pitch, loud volume
(confirm drawings)
Soundwaves are caught by the __________, then travel through the __________, where they hit the __________ and vibrate. They then make the three __________ move, which send vibrations to the fluid-filled and hair-lined __________ (and __________ for balance). The tiny hairs send messages through the __________ to the brain.
-pinna
-ear canal
-eardrum
-ossicles (hammer, anvil, stirrup)
-cochlea
-semicircular canals
-auditory nerve