1. MeasurEment
7th Grade Life Science

2. Learning Goals & Standards
Apply measurement and conversion skills.
Standards:
S7CS1: Students will explore the importance of curiosity, honesty, openness and skepticism in science and will exhibit these traits in their own efforts to understand how the world works.
understand the importance of --- and keep--- honest, clear, and accurate records in science.
S7CS4: Students will use tools and instruments for observing, measuring, and manipulating equipment and materials in scientific activities.
Use appropriate tools for measuring objects and/ or substances.

3. How is math and/or science depicted in this picture?

4. What measurements do we use?
Why is measurement important?
OPEN DISCUSSION

5. History of Measurement
Measurements have not always been standard. Many civilizations created systems of measurements that were limited in use. Many of the systems lacked uniformity and weren’t always observed by others.
How do you think ancient civilizations were able to measure items?
What tools would you suspect these ancient civilizations used for measuring?
What do you think would be possible problems with multiple measurement systems?
What are possible solutions to the problem of multiple systems?

6. History of Measurement Continued
Metric system and the English (standard) system
During ancient periods, what tools where available for measurement?
If you lived during an ancient period, what system would you have developed to promote uniformity?
Obtain a copy of the Measurement Scavenger Hunt Cornell Notes

7. Measurement Scavenger Hunt: Cornell Notes
Essential Question:
What are the English and SI (metric) systems and how do they compare?

8. Measurement Cornell Notes
What is a standard?
A standard is considered a basis of comparison.
Examples: A standard sized football; a standard sheet of paper.
Are there any other examples you can think of?

9. Measurement Cornell Notes
Why is it important to have standard measurement units?
Standard measurement units ensures that all measurements have a set value and may be compared to other measurements.
Example: 8 ounces of lotion is the same regardless of the brand purchased.
The English system of measurement was originally based on common objects.
Examples:
Inch= 3 barleycorns laid end-to-end
Yard= Length between the nose and fingertip of an outstretched arm of King Henry I of England
Stone= weight of certain stones determined by individual English cities.
The metric system (System International or SI) was developed by the French, is based on facts of nature and has units that are multiples of 10 of each other.

11. Measurement Cornell Notes
Why is it important to have standard measurement units?
The metric system was developed by the French, is based on facts of nature and has units that are multiples of ten of each other.
Examples:
Meter= the distance light travels through a vacuum in 1/299,792,458 of a second.
Centimeter= 1/100 of the length of a meter
Liter= cubic decimeter(10cm length x 10cm width x 10cm height) or cubic centimeters
Kilogram= Mass of the standard kilogram, a platinum- iridium cylinder kept in Sevres, France
(Note: Students write kilogram on your paper below liter because it is missing from your Cornell Notes handout)

13. Measurement Cornell Notes
Why is it important to have standard measurement units?
Basic SI units and prefixes:
Basic Unit
English Comparison
Prefixes
Mass
Kilogram
2.2 pounds
g= 1/1000 kg 1cg=1/100 g
1mg=1/1000g
Length
Meter
39 inches
cm=1/100m
1mm= 1/1000m
1000m=1 km
Volume
Liter
gallons
cL= 1/100L
1ml= 1/1000L
1000L= 1kL

14. Measurement Cornell Notes
Other English- SI comparisons:
1 inch= 2.5 cm
1 gram= mass of a paper clip
1mL= 1/5 of a teaspoon
1m= 1 yard + 3 inches
2L = soft drink bottle

15. Measurement Cornell Notes: Summary
In your own words summarize what you have learned. Hint: Try to develop a short answer to our essential question (located at the top of our Cornell Notes)

16. Measurement Scavenger Hunt Activity
Turn over to the back side of your Cornell Notes Handout.
With a partner, you will suggest items in the classroom that fits each measurement listed in the table (without measuring)
Write the items that you identify in the first column to the left of the specified length.
Obtain a ruler and return to the identified items, Measure the item and write the value in the Actual length column beside the specified item.
In the column that reads inches, you will convert cm, m, mm to inches ( do as many as you can utilizing the conversions from your Cornell Notes.
In the last column, Difference, you will subtract the actual length from the length.
For example: you identified an iphone to be 22cm but after measuring you determine the length to be 17.5cm your data table would be completed as shown in the table below.
Item
Length
Actual Length
Inches
Difference
iphone
22cm
17.5cm
7in
17.5𝑐𝑚 ∗ 1𝑖𝑛𝑐ℎ 2.5𝑐𝑚 = 7inch
22cm-17.5cm= 4.5cm
(length – actual length= difference)

17. Lets get started! Ask questions if needed!!! (Remember three before me)