Semester Exam 2024

Which instrument measures the length of an object?

• beaker

• graduated cylinder

• triple beam balance

• meter stick

What is the mass that is shown on each of the triple beam balances?

• 480.5g

• 408.5g

• 485.0g

Measure the following volumes.

• 85 ml

• 82 ml

• 80 ml

If you do not understand a direction or part of a laboratory procedure, you should ________.

• figure it out as you do the lab.

• try several methods until something works.

• ask the teacher before proceeding.

• skip it and go on to the next part

After completing an experiment, all chemical wastes should be

• left at your lab station for the next class.

• disposed of according to your teacher’s directions.

• dumped in the sink.

• taken home.

Horseplay, practical jokes, or pranks in the lab are ________________.

• always against the rules.
• okay.

• not dangerous.
• Okay if you are working alone.

When you work in the lab, long hair must be _______________.

• Cut off
• Tied back out of the way
• Held by both hands
• Combed nicely

Lisa boiled 5 cups of water in the pot. This is an example of a (n) _______________.

• Qualitative observation

• Quantitative observation

• Inference

• Conclusion

The grass turned brown and stiff at the end of July. This is an example of a (n) _______.

• Hypothesis

• Qualitative observation

• Quantitative observation

• Inference

For an experiment, a scientist put lime at the base of tomato plant A and baking soda at the base of tomato plant B. She then sealed the plants in plastic bags. Tomato plant A eventually died, and tomato plant B stayed healthy. What was the dependent variable in this experiment?

• Type of plant grown for the test

• Response of the plants to each substance

• Substance at the base of each plant

• Plastic bags wrapped around each plant