Question

Water has a density of 1g/cm3. Describe an investigation that could test whether a material has a density less than, greater than, or equal to water and identify the independent and dependent variable in your investigation. Also, identify your hypothesis.

Answer 1

To test the density of a material compared to water, you can use the water displacement method. The independent variable is the material being tested, the dependent variable is the density, and the hypothesis could be that materials with a density less than 1g/cm³ will float, while those with a density greater than 1g/cm³ will sink.

Step-by-step explanation:

To test whether a material has a density less than, greater than, or equal to water, you can conduct an investigation using the water displacement method. Here's how:

1. Select a material you want to test for its density.
2. Measure the mass of the material using a scale.
3. Fill a graduated cylinder partially with water and record the initial volume.
4. Slowly add the material to the cylinder, making sure it doesn't touch the sides.
5. Record the final volume after the material has been added.
6. Calculate the density of the material by dividing the mass by the change in volume.

The independent variable in this investigation is the material being tested, and the dependent variable is the density of the material. The hypothesis could be that if the density of the material is less than 1g/cm³, it will be less dense than water and float, while if the density is greater than 1g/cm³, it will be denser than water and sink.

Answer 2

You can test whether or not the object is more or less dense than what by having, “80mL” (as long as the amount of water is easy to read and doesn’t overflow). You take all the object you want to test for, slowly and carefully drop the object into the water. If the Object sinks it is more dese and if it floats it is less dense. To find the exact density of the tested objects look at how much water is being displaced in the container and subtract the amount of water from that to get volume. Then, (or before putting the object into water) weight the object to find its mass. Next you divide the mass in mL by the volume to get the exact density.

Step-by-step explanation: