8th Grade - International System of Units

St. George's College

Subject: 7th CHEMISTRY

Class: International

Teacher's notes

Objectives

Vocabulary

System of units Date: April 21st

Link and Learn

Prepared by

2009 1

8th Milton A ‐ Atomic Calculations Name

Oral Intervention

Coin

Chocolate

Sergio María Fernanda Alejandra Almendra Anna Paula Sandra E‐C Maia María Belén Alfredo Kinley Arianne Sandra M. Fiorella Rodrigo Giulia Jaime Stefano Bruno

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8th Milton Alpha ‐ Atomic Calculations Name

Oral Intervention

Coin

Chocolate

Marcelo Antonella Paulo Alejandro Brenda Diego Gabriel Valeria Cristina Giuliana Joshua María Gracia Gonzalo N. Paolo Gonzalo R. Giorgio Nicolás María Claudia

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Dimensions in Science • Science is based on experimentation and handling of data.

• But none of this could be possible if we couldn't work and manipulate quantities, and/or measurements based on units.

• Units, or dimensions, are any specified amounts of quantity, as of length, volume, force, momentum, or time, by comparison with which any other quantity of the same kind is measured or estimated.

• Units are different depending on the scale, or set of units.

Usually, certain countries adopt certain scales of units.

• The most used scale is: MKS‐cgs or Metric System.

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http://tinyurl.com/c9yest 6

Exercise 1 Express the following numbers using exponential notation:

1. 10000 2. 0,0001 3. 10000000000 4. 0.0175 5. 9200000 6. 371 7. 7.480 8. 134.2 9. 0,000089 10. 26000000000000

Express the following numbers using the long form:

1. 7.95 x 10‐1 2. 5 x 10‐6 3. 3.08 x 10‐3 4. 1 x 10‐12 5. 14.3 x 102 6. 9.065 x 10‐4 7. 4.3 x 103 8. 6.854 x 1014 9. 37.1 x 10‐7 10. 16.9 x 100

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Exercise 2 Add the following dimensions: 1. 48.53 cm + 33 in + 1.15 m 2. 0.0653 g + 4.83 Kg + 65.1 g 3. 28°C + 77°F 4. 63.489 cm3 + 1.5 dL + 15 ml 5. 44 m + 1.5 h + 58 s

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Exercise 3 Convert the following measurements to grams:

1. 41.5 cg 2. 3.89 mg 3. 0.9785 kg 4. 9.9 kg 5. 11.9 dag 6. 28.5 cg

7. 75.3 cg 8. 14.587 mg 9. 28.1 dg 10. 2.3 dag 11. 423 mg 12. 13.4 mg

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Exercise 4 Convert the following measurements to microns:

1. 1.00 mm 2. 329 cm 3. 0.058 dm 4. 3.5 cm 5. 11075 Å

6. 4.0 dm 7. 4812.0 Å 8. 6.9 x 10‐12 mm 9. 4.28 x 10‐6 cm 10. 129 mm

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International System of Units

IS Units ‐ Doc

Practical Guide to IS Units Guide for the Use of IS Units

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Resources Used Slide (Group)

Resource

Description

Origin

G1 ‐ 2

Image

Beethoven

http://bit.ly/Q7ggk

G1 ‐ 3

Image

Mozart

http://bit.ly/18LkW6

G1 ‐ 5 Image G1 ‐ 6

Image

IS Units and Prefixes http://tinyurl.com/c9d69c Units

http://tinyurl.com/c9yest

G1 ‐ 8 G1 ‐ 10 G1 ‐ 11 G1 ‐ 12

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Teacher's Notes This class has been designed to cover the topics of International System of Units from Monday April 20th till Friday April 24th.

For further knowledge about this topic: 1. Conduct a thorough search under the topic: International System of Units on the Web, books and magazines.

2. If findings are not specific, ask your teacher for suggestions.

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Objectives • Describe the concepts of: Volume, Length, Temperature, Pressure, and International System of Units.

• Perform basic calculations with the system of units.

Note: All, or most, of the objectives will be covered during class time, however the student must be responsible for those objectives not covered or concluded.

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Vocabulary • • • • • •

Unit: Length: Math: Volume: Density: Pressure:

Note: Most of the vocabulary words will be covered during class time, however the student must be responsible for those words not covered or concluded.

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Link and Learn You can visit the following websites to improve your understanding on the present topic: • http://science‐learning2009.wikispaces.com • http://learningandscience.blogspot.com • http://libraryatstgeorge.blogspot.com

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Prepared by

Gerardo LAZARO Science Lead Teacher Email: glazaro@sanjorge.edu.pe Wiki: http://science‐learning.wikispaces.com Blog: http://learningandscience.blogspot.com Twitter: http://twitter.com/glazaro

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Attachments

7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Supergoo to the Rescue.docx 7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Graphene's Superstrength.docx 7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Meteorites may have sparked life on earth.docx 7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Plastic munching microbes.docx International System of Units.doc Practical Guide to the International System of Units.pdf Guide for the Use of the International System of Units.pdf