Английский язык. Ильичева Н.А - 47 стр.

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47
Follow – up Activities
13. Can the destruction of sensitive plants be reduced by watering them in
the evening if temperature may drop below freezing?
Answer by choosing the correct variant.
The destruction of sensitive plants due to freezing can be a) enhanced /
reduced by watering them in the evening. When water becomes ice it will b)
release / absorb a certain amount of heat. The heat will be c) taken way from /
given to the plant. It will d) tear the plant apart / help the plant survive.
14. What makes water particularly good for heating systems (i.e. hot water
radiators).
Put the sentences into the correct order to give the explanation.
4
1. The heat flow in the opposite direction (when iron and water are both cooled)
would be the same.
2. It means that water requires almost ten times more heat to raise its
temperature than the corresponding amount of iron.
3. Water is ideal because it satisfies the requirement of a minimal drop in
temperature.
4. The specific heat of water is quite high (1.00 kcal / kg ⋅ °C = 4186 J / kg ⋅ °C)
in comparison with, for example, iron (0.11 kcal / kg ⋅ °C = 840 J / kg ⋅ °C).
5. The
temperature decrease in iron would be ten times greater than in the
same amount of water.
15. Explain why burns caused by steam on the skin are often more severe
than burns caused by water at 100° C. Explain by answering the
questions. Use prompts to answer.
a) it causes a rise in its temperature, b) because the steam becomes much hotter
than ……., c) because added heat goes into changing the liquid into a gas, d)
it starts boiling.
1. What happens to a quantity of water when it reaches a temperature of 100°
C?
2. Why doesn’t the temperature of the water change when we keep adding heat?
3. How does the temperature of the steam change if heat is added?
4. Why are the burns caused by the steam more severe?
16. You need to calculate how much it would cost to heat a bathtub full of
water (80 kg) from 12° C to 42° C for four people taking a bath daily for
one month. 
                                         47


Follow – up Activities


13. Can the destruction of sensitive plants be reduced by watering them in
   the evening if temperature may drop below freezing?
   Answer by choosing the correct variant.

    The destruction of sensitive plants due to freezing can be a) enhanced /
reduced by watering them in the evening. When water becomes ice it will b)
release / absorb a certain amount of heat. The heat will be c) taken way from /
given to the plant. It will d) tear the plant apart / help the plant survive.

14. What makes water particularly good for heating systems (i.e. hot water
    radiators).
    Put the sentences into the correct order to give the explanation.
       4

1. The heat flow in the opposite direction (when iron and water are both cooled)
   would be the same.
2. It means that water requires almost ten times more heat to raise its
   temperature than the corresponding amount of iron.
3. Water is ideal because it satisfies the requirement of a minimal drop in
   temperature.
4. The specific heat of water is quite high (1.00 kcal / kg ⋅ °C = 4186 J / kg ⋅ °C)
   in comparison with, for example, iron (0.11 kcal / kg ⋅ °C = 840 J / kg ⋅ °C).
5. The temperature decrease in iron would be ten times greater than in the
   same amount of water.

15. Explain why burns caused by steam on the skin are often more severe
   than burns caused by water at 100° C. Explain by answering the
   questions. Use prompts to answer.
a) it causes a rise in its temperature, b) because the steam becomes much hotter
   than ……., c) because added heat goes into changing the liquid into a gas, d)
   it starts boiling.
1. What happens to a quantity of water when it reaches a temperature of 100°
   C?
2. Why doesn’t the temperature of the water change when we keep adding heat?
3. How does the temperature of the steam change if heat is added?
4. Why are the burns caused by the steam more severe?

16. You need to calculate how much it would cost to heat a bathtub full of
    water (80 kg) from 12° C to 42° C for four people taking a bath daily for
    one month.

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