Reading Temperature (A) worksheet displaying six thermometers with Celsius and Fahrenheit scales for measuring and recording temperature.

Let's solve the problem step by step.

We are given six thermometers, each showing a temperature in both Fahrenheit (°F) and Celsius (°C). For each thermometer, we need to:

1. Read the temperature in Celsius (°C).
2. Read the temperature in Fahrenheit (°F).
3. Record both values in the blanks provided.

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🔹 Conversion Formula (for reference):

To convert between °C and °F:
- $ F = \frac{9}{5}C + 32 $
- $ C = \frac{5}{9}(F - 32) $

But since the scales are marked on the thermometers, we can directly read the values.

Let’s go one by one.

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🔹 Thermometer 1 (Top-left)

- The red column reaches 90°F.
- On the Celsius side, it reaches 32°C.

✔ So:
- °C: 32
- °F: 90

---

🔹 Thermometer 2 (Top-center)

- Red column is at 30°F.
- On Celsius scale, this is -1°C (since 30°F ≈ -1°C).

✔ So:
- °C: -1
- °F: 30

---

🔹 Thermometer 3 (Top-right)

- Red column is at 20°F.
- On Celsius scale, this is about -6.7°C, but looking at the markings, it's just below 0°C — actually, it's at -6°C (since 20°F = -6.7°C, but the scale shows whole numbers).

Wait: Let's check carefully.

Looking at the scale:
- The Celsius side has marks every 10 degrees: -20, -10, 0, 10, ...
- Between -10 and 0, there are 10 small divisions → each is 1°C.

The red mercury stops just above -10°C, at the second line above -10, so that’s -8°C?

Wait — let's recheck.

Actually, 20°F is approximately -6.7°C, which would be about -7°C on the scale.

But let's see where the mercury is:

On the Fahrenheit side, it's at 20°F.

Now look at the Celsius scale:
At 20°F, the corresponding Celsius value is:
$$
C = \frac{5}{9}(20 - 32) = \frac{5}{9}(-12) = -6.67°C
$$

So it should be about -7°C, but on the thermometer, the mercury is between -10 and 0, and appears to be at the 6th tick above -10, meaning -4°C? Wait — no.

Let’s count properly.

From the diagram:

- The Celsius scale goes from -20 to 40.
- Each major mark is 10°C.
- Between each 10°C, there are 10 small lines → each is 1°C.

In Thermometer 3:
- The red column reaches 20°F.
- On the Celsius side, it's just above -10°C, but how far?

Wait — 20°F corresponds to -6.7°C, so it should be 6.7°C above -10°C, i.e., -3.3°C? No!

Wait:
- -10°C is 14°F (since: $ F = \frac{9}{5}(-10) + 32 = -18 + 32 = 14°F $)
- 20°F is higher than 14°F → so it's above -10°C

So:
$ C = \frac{5}{9}(20 - 32) = \frac{5}{9}(-12) = -6.67°C $

So the temperature is -6.67°C, which rounds to -7°C.

But on the thermometer, the red column is at the 4th tick above -10°C, because:

- From -10°C up:
- 1st tick: -9°C
- 2nd: -8°C
- 3rd: -7°C
- 4th: -6°C

Wait — no! If the scale is marked with 10 small divisions between -10 and 0, then:

- -10°C → first line
- Then: -9, -8, -7, -6, ..., 0

So if the red column is at the 4th line above -10°C, that’s -6°C.

But 20°F = -6.67°C, so it should be between -7 and -6°C, closer to -7.

But in the image, it looks like the mercury stops just below -6°C, or maybe at -7°C?

Wait — let's look again.

Actually, in many such worksheets, the values are chosen to be exact.

Let’s assume the markings are precise.

Let’s check: What is 20°F in Celsius?

$$
C = \frac{5}{9}(20 - 32) = \frac{5}{9}(-12) = -6.67°C
$$

So it's -6.67°C, which is very close to -7°C, but not exactly.

But the thermometer likely shows -7°C as the nearest mark.

But wait — on the Celsius scale, -7°C is not a labeled line, but it's the third tick above -10°C (since -10, -9, -8, -7, -6, etc.).

So if the red column is at the third tick above -10°C, that’s -7°C.

But in the image, the red column is slightly below that?

Alternatively, perhaps the intended reading is -7°C.

But let's move on and check the others.

---

Wait — perhaps I should read directly from the thermometers based on the visual.

Let me describe each thermometer clearly.

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🔹 Thermometer 1 (Top-left)

- Fahrenheit: Red column reaches 90°F.
- Celsius: At 90°F, $ C = \frac{5}{9}(90 - 32) = \frac{5}{9}(58) ≈ 32.2°C $ → so 32°C (nearest marked line).
- So: 32°C, 90°F

✔ Answer:
- °C: 32
- °F: 90

---

🔹 Thermometer 2 (Top-center)

- Fahrenheit: Red column at 30°F
- Celsius: $ C = \frac{5}{9}(30 - 32) = \frac{5}{9}(-2) ≈ -1.1°C $ → so -1°C
- So: -1°C, 30°F

✔ Answer:
- °C: -1
- °F: 30

---

🔹 Thermometer 3 (Top-right)

- Fahrenheit: Red column at 20°F
- Celsius: $ C = \frac{5}{9}(20 - 32) = \frac{5}{9}(-12) = -6.67°C $ → so -7°C (closest whole number)
- But on the thermometer, the red column is just above -10°C, and seems to be at the 4th tick above -10°C → that would be -6°C?

Wait — no:
If each small division is 1°C, and the line is at -6°C, then:
- -10, -9, -8, -7, -6 → 4 steps above -10 → -6°C

But -6°C = 21.2°F, which is close to 20°F, but not exact.

But 20°F = -6.67°C, so it should be between -7 and -6°C, closer to -7.

But on the thermometer, the red column is at the 3rd tick above -10°C, which is -7°C.

Yes — let's say it's -7°C.

But wait — let's check the image description.

Actually, in standard thermometers, the scale is aligned.

So for 20°F, the corresponding Celsius is -6.67°C, which is closer to -7°C.

But since the scale has whole-degree markings, and the mercury is just below -6°C, it might be -7°C.

But in the image, the red column appears to be at the 3rd line above -10°C, which is -7°C.

So:
- °C: -7
- °F: 20

✔ Answer:
- °C: -7
- °F: 20

---

🔹 Thermometer 4 (Bottom-left)

- Fahrenheit: Red column at 90°F (same as top-left)
- Celsius: Same as before → 32°C

✔ So:
- °C: 32
- °F: 90

---

🔹 Thermometer 5 (Bottom-center)

- Fahrenheit: Red column at 50°F
- Celsius: $ C = \frac{5}{9}(50 - 32) = \frac{5}{9}(18) = 10°C $

✔ So:
- °C: 10
- °F: 50

---

🔹 Thermometer 6 (Bottom-right)

- Fahrenheit: Red column at 40°F
- Celsius: $ C = \frac{5}{9}(40 - 32) = \frac{5}{9}(8) ≈ 4.44°C $ → so 4°C or 5°C?

But 40°F = 4.44°C → closest is 4°C or 5°C?

But on the scale, it's just above 0°C, and 4.44°C is about halfway between 4 and 5, but likely marked at 4°C.

Wait — let's see:

- 40°F = 4.44°C → so 4°C is the nearest whole number.

But on the thermometer, the red column is at the 4th tick above 0°C → that’s 4°C.

Yes — each small division is 1°C.

So:
- °C: 4
- °F: 40

✔ Answer:
- °C: 4
- °F: 40

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✔ Final Answers:

Let’s list them all:

| Thermometer | °C | °F |
|------------|----|----|
| 1 (top-left) | 32 | 90 |
| 2 (top-center) | -1 | 30 |
| 3 (top-right) | -7 | 20 |
| 4 (bottom-left) | 32 | 90 |
| 5 (bottom-center) | 10 | 50 |
| 6 (bottom-right) | 4 | 40 |

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📝 Summary of Answers:

1. 32°C, 90°F
2. -1°C, 30°F
3. -7°C, 20°F
4. 32°C, 90°F
5. 10°C, 50°F
6. 4°C, 40°F

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✔ Explanation:

Each thermometer shows a red column indicating the temperature. We read the value where the red line stops on both the Fahrenheit and Celsius scales.

For non-exact conversions (like 20°F), we use the formula or approximate to the nearest degree.

However, in these cases, the temperatures are chosen so that they align closely with whole numbers.

For example:
- 90°F ≈ 32°C (boiling point of water is 100°C = 212°F, so 90°F is less than that)
- 30°F ≈ -1°C (freezing point is 0°C = 32°F)
- 20°F ≈ -7°C
- 50°F = 10°C
- 40°F ≈ 4°C

These are standard approximations used in such worksheets.

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✔ Final Answer:

```
Thermometer 1: 32°C, 90°F
Thermometer 2: -1°C, 30°F
Thermometer 3: -7°C, 20°F
Thermometer 4: 32°C, 90°F
Thermometer 5: 10°C, 50°F
Thermometer 6: 4°C, 40°F
```