Lab: Measurement

Question 1

Here are some densities computed by a student doing this laboratory experiment. RockWaterWooden block3.34 g/cm31.00 g/cm30.495 g/cm3The student noticed that the rock sank in water. After the experiment, she put the wooden block in the water and it floated. Use the densities above to explain why.

Revolt · Accepted Answer

The rock sank because its density (3.34 g/cm³) is greater than the density of water (1.00 g/cm³). The wooden block floated because its density (0.495 g/cm³) is less than the density of water.

Question 2

What information did you include in your response? Check all that apply.

Revolt · Accepted Answer

A: Objects, such as the rock, with densities greater than 1 g/cm3 will sink in water because they are more dense.; B: Objects, such as the wooden block, with densities less than 1 g/cm3 will float in water because they are less dense.

Question 3

As you have seen in this lab, the density of water is near 1 g/cm3. Anything with a density lower than this will float in water, and anything with a higher density will sink. Imagine you are building a submarine. How could you be sure to have it sink and then rise?

Revolt · Accepted Answer

C: Develop a way to adjust its density so that it can be above and below 1.0 g/cm3.

Lab: Measurement Answers

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