1. Science Measurements And Use of the formula page ruler
PASS Tutorial
Science Measurements
And
Use of the formula page ruler

2. What is on the side? Along the side of the science chart is a ruler.
What are the units of this ruler?
How many of them are there?
What are the smallest divisions of units called?
Centimeters
20 Cm
Millimeters

3. We need to measure . . .
Length in meters, or centimeters, or millimeters.
Volume of a liquid or odd shaped solid, in Liters or milliliters.
Mass remember is always in grams or Kilograms.

4. Typical science measurement question . . .
The pictures above show two organisms. Measure their body lengths to the nearest tenth of a centimeter. What is the difference between the body lengths of the grasshopper and cricket? Record and bubble in your answer to the nearest tenth on the answer document.
Difference, that means subtract, right? Okay, big – little, to the nearest 1/
But, that’s not all, is it? It wants you to use some math also

5. Do you know how to read the ruler?
2.22 cm is just smaller than an inch - Just so you know!!
Do you know how to read the ruler?
Which of the following shows the length of a rubber strip measured precisely to 2.22 centimeters?
In science, precise means repeatable. So, you should measure each line more than once!!

6. Pay attention to precision requested! Again, measure more than once!!
Now that you measured, use it to calculate speed! After all the real reason for math is to DO Science . . .
20 An ant crawled from Point A to Point B in 4.0 seconds. To the nearest tenth, what was the ant’s speed in centimeters per second?

7. You may have noticed . . .
I have not given you answers today. That is because the copy that is placed on the projector is not the same ‘size’ as you have on your handout. So, our measurements will be different.

8. What do you need to do to answer the question?
Multiply your distance measured by 2, since we only measured ½ second.
4 The picture shows the position of a ball every 0.25 second on a photogram. Using a ruler, determine the velocity of the ball.
.25 s
.25 s
F 3.5 cm/s
G 10.5 cm/s
H 14.0 cm/s
J 28.0 cm/s
When measuring anything, make sure you measure from and to the same position, front to front or back to back.

9. Be sure you measure more than once . . .
The key on the science test to measuring problems, is in 9 released tests, only one question asked for just a measurement.
In order to answer correctly, you must measure correctly AND calculated correctly. Do not stop until you have actually answered the question.
Do not answer in cm if you want cm/s, calculate using your formula page.