Qualitative and Quantitative Worksheet - CHEM110 - Studocu - Free Printable

Qualitative vs Quantitative Observations – Solved Worksheet

Let's go through each statement and classify it as either qualitative (1) or quantitative (2) based on the definitions:

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Definitions Recap:
- Qualitative observations: Use senses (sight, smell, touch, taste, hearing) — descriptive, not measurable.
- Quantitative observations: Use instruments to measure — involve numbers and units.

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Answers:

1. It is light green in color.
→ 1 (Qualitative) – Describes color using sight.

2. It tastes sour.
→ 1 (Qualitative) – Uses taste.

3. One leaf is 9 cm long.
→ 2 (Quantitative) – Measured length with a ruler.

4. It makes a loud pop sound.
→ 1 (Qualitative) – Describes sound using hearing ("loud" is subjective).

5. The mass of the computer is 1.5 kg.
→ 2 (Quantitative) – Measured using a balance.

6. It smells sweet.
→ 1 (Qualitative) – Uses sense of smell.

7. The temperature of the room increases by 8 °C.
→ 2 (Quantitative) – Measured with a thermometer.

8. It gets darker over a period of time.
→ 1 (Qualitative) – Descriptive change in light (sight), no measurement.

9. The flower clusters in 3 blooms.
→ 2 (Quantitative) – Countable number (3 blooms).

10. It feels very rough.
→ 1 (Qualitative) – Touch sensation, subjective.

11. The plant is short.
→ 1 (Qualitative) – "Short" is relative and descriptive; no specific measurement.

12. Leaves are stiff.
→ 1 (Qualitative) – Texture observed by touch.

13. The veins are 3 mm wide.
→ 2 (Quantitative) – Measured width with a tool.

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Write a qualitative example:

👉 *The liquid is cloudy and has a foul odor.*

Write a quantitative example:

👉 *The beaker contains 50 mL of water.*

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What type of observation do you think is more scientific and why?

👉 Quantitative observations are more scientific because they are objective, measurable, and reproducible. They use numbers and instruments, reducing personal bias and allowing for accurate comparisons and data analysis. Qualitative observations, while useful, can be subjective and vary from person to person.

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✔ Final Answer Key:

1. 1
2. 1
3. 2
4. 1
5. 2
6. 1
7. 2
8. 1
9. 2
10. 1
11. 1
12. 1
13. 2

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