Celsius and Fahrenheit

Show your work for each problem.

1.
At what temperature does water freeze in Celsius?
1. a)
2. b)
3. c)
4. d)
Answer:
Water freezes at in the Celsius scale. This is one of the key reference points of the Celsius system.
2.
At what temperature does water freeze in Fahrenheit?
1. a)
2. b)
3. c)
4. d)
Answer:
Water freezes at in the Fahrenheit scale. This is why we add 32 when converting from Celsius to Fahrenheit.
3.
Which formula converts Celsius to Fahrenheit?
1. a)
2. b)
3. c)
4. d)
Answer:
To convert Celsius to Fahrenheit, multiply by (or 1.8), then add 32. The other formulas are either for the reverse conversion or incorrect.
4.
At what temperature are Celsius and Fahrenheit equal?
1. a)
2. b)
3. c)
4. d)
Answer:
. This is the only temperature where both scales show the same number. You can verify: .
5.
What is normal human body temperature in Fahrenheit?
1. a)
2. b)
3. c)
4. d)
Answer:
Normal body temperature is , which equals . The option would be very cold for a living human!
6.
Convert to Fahrenheit.
Answer: 32
is the freezing point of water. Using the formula: .
7.
Convert to Fahrenheit.
Answer: 212
is the boiling point of water. .
8.
Convert to Fahrenheit.
Answer: 68
. This is a comfortable room temperature.
9.
Convert to Celsius.
Answer: 30
. A warm summer day!
10.
Convert to Fahrenheit.
Answer: -4
. Very cold winter weather!
11.
Convert to Fahrenheit step by step.
Answer: 50
1. Write the formula for C to F conversion (C * 9/5) + 32
2. Multiply 10 by 9/5 (or 1.8). What do you get? 18
3. Add 32 to your answer. What is the final temperature in Fahrenheit? 50
12.
Convert to Celsius step by step.
Answer: 25
1. First, subtract 32 from 77. What do you get? 45
2. Now multiply 45 by 5/9. What is 45 x 5? 225
3. Divide 225 by 9. What is the temperature in Celsius? 25
13.
Convert to Fahrenheit step by step.
Answer: 95
1. Multiply 35 by 9. What do you get? 315
2. Divide 315 by 5. What is the result? 63
3. Add 32 to get the final answer in Fahrenheit. 95
14.
Convert to Fahrenheit step by step.
Answer: 5
1. Multiply -15 by 9. What do you get? -135
2. Divide -135 by 5. What is the result? -27
3. Add 32 to -27. What is the final temperature? 5
15.
An oven recipe says . Convert to Celsius step by step.
Answer: 204
1. First, subtract 32 from 400. What do you get? 368
2. Multiply 368 by 5. What is the result? 1840
3. Divide 1840 by 9. What is the approximate temperature in Celsius? 204
16.
The temperature dropped from to . What is this change in Celsius?
Answer: 20
1. Convert to Celsius. 10
2. Convert to Celsius. -10
3. What is the temperature change? From 10 to -10 is a drop of how many degrees? 20