Seeing, Hearing, Feeling What you may already know:
z Swimming pools can sometimes appear to be shallower than they actually are. z White light is made up of seven colours, the colours of the rainbow. z Sounds that are too loud are bad for your ears. z Body temperature is measured with a thermometer.
What you will learn in this chapter:
z How light can be reflected off different surfaces to form images.
z The bending of light as it goes from air into glass, water or your eye.
z How white light can be dispersed and why objects have colours. z How sounds are created and heard. z The ways that heat can be transferred through substances. z How heating and cooling affects substances. z What temperature is and how to measure it.
z Is there a cure for blindness? z What is a sonic boom?
z Can you crack this code?
The first letter of each of these images spells out a key word that you will come across in this chapter. Use the hints provided if you need to, or revisit the Puzzler after you finish this chapter.
1. 2. 3. 4. 5.
Where are the hottest and coldest places on Earth?
A shape with parallel sides
332 1. __
Appears in the sky after a rain shower
2. __
As Buzz Lightyear might say, ‘To ___ and beyond!’
3. __
A luminous celestial body
4. __ 5. __
Neil Armstrong was the first person to walk on this in 1969
