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Year 8 Science

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Across
1
Material that does not let light through
8
Unit of sound
10
Part of ear that changes vibrations into electrical impulses
17
Small air sacs in lungs
18
Table of elements
19
Method of separating mixtures using paper
20
Used to split light into colours of the spectrum.
22
A pair of muscles that work together
24
Major muscle for breathing
25
Angle of reflection is measured compared with this.
26
A point that something turns about
Down
2
Unit of pressure
3
White light through a green filter
4
Between blue and violet in spectrum
5
Used for respiration
6
Windpipe
7
A measure of how likely something is to react
9
Should not be muddled up with respiration
11
Carries oxygen in blood
12
The blood system
13
Product of anaerobic respiration in animals (6,4)
14
When waves change direction at a boundary
15
A magnet that you can turn on and off
16
A scientific theory to test
21
One product of anaerobic respiration in plants
23
Unit of force