Question

concept 1 open response
test a

1. look at the picture to the right. make a qualitative observation, a quantitative observation, and an inference. (3 pts)
2. name 2 pieces of lab equipment found in a science lab and describe what they are used for. (2 pts)
3. five students each used the same ruler to measure the length of the same pencil. their measurements were: 15.33 cm, 15.34 cm, 15.33 cm, 15.33 cm, 15.34 cm. the actual length of the pencil was 15.85 cm. explain whether the students measurements were accurate, precise, both, or neither. (2 pts)
4. write a hypothesis predicting a relationship between the following independent variable (iv), and dependent variable (dv): (4 pts)

iv - amount of caffeine dv - breathing rate of goldfish

1. identify the independent and dependent variables in the hypotheses below: (4 pts)

a. if a player practices longer, then he will score more points in the game.
b. if students eat a high - protein breakfast, then they will score higher on their biology test.

Explanation:

16.

• Qualitative observation: The ship is red.
• Quantitative observation: There are 3 seagulls in the sky.
• Inference: The people in the water are likely enjoying a dive or swim as they are equipped with snorkels.

• Beaker: Used for holding and mixing liquids.
• Test - tube: Used for conducting small - scale chemical reactions or holding small amounts of substances.

The measurements are precise as the values are very close to each other (15.33 cm and 15.34 cm). But they are not accurate since the actual length is 15.85 cm and the measured values are much lower. So the measurements are precise but not accurate.

Answer:

Qualitative observation: The ship is red.
Quantitative observation: There are 3 seagulls in the sky.
Inference: The people in the water are likely enjoying a dive or swim as they are equipped with snorkels.

17.