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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

Choosing Tools and Procedures for Investigations

Lesson 2

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

slide3

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
Research the Uses for Each:
  • Ruler
  • Thermometer
  • Graduated cylinders
  • Beakers
  • Flask
  • Pan balance
  • Spring scale
  • Stopwatch
  • Microscope
  • Telescope
  • Hand lens
  • Calculator
  • Computer
  • Scale
density
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
Rock and Marble Lab
  • On a CPOP, write the problem for this lab.
  • Then, write your hypothesis.
  • 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.
  • Choose a rock that will fit in your graduated cylinder.
  • Then, pour some water in your graduated cylinder.
slide7

Measure the amount of water in your graduated cylinder.

  • 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.
slide8
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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
The Conclusions
  • Write your conclusion-Which item had the most density?
  • Graph the density of both the marble and the rock. Title your graph and explain all numbers. On your graph, include your conclusion.