Measuring Notes

Understanding of

Scientific and
Engineering

Practices

Why Ask
Questions?

◦Ask questions to determine
relationship between independent and
dependent variables

◦Example “How much salt can be
dissolved into water before the salt
is no longer dissolvable?”

◦Make a hypothesis and identify
relationship between independent and
dependent variables

◦“ one cup of water can dissolve two
pinches of salt” or “one cup of
water can dissolve one cup of salt”

◦Solutions to design problems

2

Planning and Carrying out

Investigations

◦Observation and experimental investigation to identify
variables, constants, and controls

◦How can we make a accurate method of collecting data

◦Use Metric measurements for experiments

3

Metric Measurements

Liquids: 1 Liter (L) = 1,000 milliliters

(mL)

Solids:1 milligram (mg) = 1/1,000

gram (g)

1kilogram (kg) = 1,000 grams (g)

Metric system

In science, we measure constantly. We
measure length, mass, volume, density,

temperature, and a large number of

other properties. Making accurate

measurements of these

properties is a key part of making

quality observations in the process of

doing science.

Metric system

The Metric System was developed in

France in the 1790’s. French

authorities at that

time noticed that there was great

confusion across their country related

to measurement.

Metric system

During the 1790’s they put together the

Metric System or the System

Internationale (SI) as it’s known to most

of the world. And while it

was first used in France, we find that

today it is used in almost every country

on Earth.

Metric system

The key difference between the Metric System and
the English System used in theUnited States is in the

relationships between that various units. In the

Metric System, all units are related by multiples of
10. When measuring length in the metric system,
we’ll use units likemillimeters, centimeters and
meters. (Do these sound familiar?) How do these
units relate?Well, there are 10 millimeters in a
centimeter, 100 centimeters in a meter and 1000

meters in a kilometer. As you can see, the

relationship between the different units is always a

multiple of 10. This actually makes the Metric

System easier to learn and easier to use.

“
Interpreting, Analyzing, and

Evaluating Data

What pattern is in the data?

How can you organize different data?

10

Graphs

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