Temperature

6 Grade 7 Mathematics questions on Temperature, with worked marking schemes. 6 questions are available on this topic in full.

1. Question 1

   1 mark

   The temperature dropped from 25°C to −3°C. What is the change?

   A. 28°C

   B. −28°C

   C. 22°C

   D. −22°C

   (1 mark)

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2. Question 2

   1 mark

   Normal body temperature is 37°C. A patient's temperature is 39.5°C. How much higher?

   A. 1.5°C

   B. 2.5°C

   C. 3.5°C

   D. 76.5°C

   (1 mark)

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3. Question 3

   1 mark

   Water boils at 100°C. What is this in °F? (F = 9C/5 + 32)

   A. 180°F

   B. 212°F

   C. 100°F

   D. 232°F

   (1 mark)

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4. Question 4

   2 marks

   Convert 45°C to °F. (F = 9C/5 + 32)

   (2 marks)

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5. Question 5

   2 marks

   The temperature at the top of a mountain was −8°C and at the foot it was 23°C. Find the difference.

   (2 marks)

   Marking scheme

   The difference between two temperatures is the higher minus the lower: $23-(-8)$. (1)

   Subtracting a negative is the same as adding, so $23+8=31$. On a thermometer it is $8$ degrees from $-8$ up to $0$, then $23$ more. (1)

   Final answer: $31{}^{\circ }$C.

6. Question 6

   1 mark

   Convert 68°F to °C. (Use C = 5/9(F−32))

   A. 20°C

   B. 36°C

   C. 15°C

   D. 100°C

   (1 mark)

   Marking scheme

   A. $20^{\circ }$C — substitute into $C=\frac{5}{9}(F-32)$, doing the bracket first: $68-32=36$, then $\frac{5}{9}\times 36=20$. B skips the subtraction.

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