Page 38 - 新思维科学学生用书7 样章

2.2 Changes of state

Continued

thermometer
water supply
water supply thermometer

beak er
beaker
clamp stand
clamp stand
with boss
with boss gauze
gauze
tripod
tripod
heat proof mat
heat pr oof ma t
measuring
measuring
cylinder
cylinder

stop watch
stop wa tch safety
safety
Bunsen burner
spectacles Bunsen burner
spectacles
1 Accurately measure 150 cm of water into a beaker.
3
2 Place a thermometer with its bulb in the water. Use a clamp stand, as shown in
the illustration. This is so that you measure the temperature of the water, not the

temperature of the bottom of the beaker.
3 Measure the temperature.
4 Record this in a table. (Copy and extend the one below.)

Time in minutes Temperature in °C

0

1
2

3

4

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