Choosing Tools and Procedures for Investigations

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# Choosing Tools and Procedures for Investigations - PowerPoint PPT Presentation

Choosing Tools and Procedures for Investigations . Lesson 2 You need a calculator for this lesson if you have one. .

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### Choosing Tools and Procedures for Investigations

Lesson 2

You need a calculator for this lesson if you have one.

A scientist needs scientific tools and equipment to carry out research. Without tools to weigh, heat, cool, sterilize, magnify, or mix chemicals, scientists would have a hard time doing their work.

Research the Uses for Each:
• Ruler
• Thermometer
• Beakers
• Pan balance
• Spring scale
• Stopwatch
• Microscope
• Telescope
• Hand lens
• Calculator
• Computer
• Scale
Density
• Scientists often work to find the density of an object.
• Density=mass/volume
• The mass of an object is its weight.
• The volume of an object is how much space it takes up.
• Let’s try it!
Rock and Marble Lab
• On a CPOP, write the problem for this lab.
• You will need a graduated cylinder, a rock, a marble, a scrap piece of paper, and water.
• Crumple your scrap paper and put your marble in it so it won’t roll.
• First, we will measure the density of a rock.

• Now, plop your rock in the water.
• Measure the difference in the water. The difference is the rock’s volume. Write that down and label it.
• Now, do the same thing for your marble.
• Now, we will find the mass of the rock and marble.
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• The mass is the weight. Measure each by using the tare.
• The tare will delete the weight of the paper towel.
• Weigh both and write down your measurements in grams.
• Now, we calculate.
• To find the volume, you will divide. D=m/v
The Conclusions