Collecting and Organizing Data

Question 1

Which reason is the best for choosing the ruler to measure the dimensions of the wooden block?

Revolt · Accepted Answer

C: A ruler is a good length for meauring the length of fairly small objects.

Question 2

Check the statement(s) below to ensure that distance readings are accurate.

Revolt · Accepted Answer

A: Estimate measurements to the nearest 0.05 cm.; D: Start all measurements from the zero (0) mark.

Question 3

Question 3

Revolt · Accepted Answer

The student recorded the same mass for both the empty cylinder and the cylinder with water, resulting in a calculated water mass of 0.0g. This is an error because water has mass, so the total mass should have increased after adding it. Potential causes for this error include misrecording the data, forgetting to add the water, or improperly taring the balance after the water was added.

Question 4

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 5

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.

Question 6

What is the name of the tool to the right that was used to measure the volume of the water and the rock?

Revolt · Accepted Answer

C: a graduated cylinder

Question 7

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

Revolt · Accepted Answer

A: The mass did not change after adding water, but it should have increased.; B: The electronic mass balance may not have been tared properly.; C: The student may have misrecorded data.

Question 8

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.

Collecting and Organizing Data Answers

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