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Welcome to SCIE 0910

Welcome to SCIE 0910. Why do we study science?. Need a basic understanding of science Difference between science and technology Science = process to understand and explain the natural world Technology = application of scientific principles Helps us to make informed decisions

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Welcome to SCIE 0910

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  1. Welcome to SCIE 0910

  2. Why do we study science? • Need a basic understanding of science • Difference between science and technology Science = process to understand and explain the natural world Technology = application of scientific principles • Helps us to make informed decisions • Using the Scientific Method to approach a problem and find a reasonable solution.

  3. To be successful in the study of science; you must…. • Identify and locate information to be learned • Organize the information so it can be learned efficiently and effectively • Interpret the spoken, written and symbolic language of science • Use and apply the information you have learned.

  4. The Learning Pyramid Lecture Listen Study Sessions Read Lecture Audiovisual Lecture & Lab Demonstration Study Sessions Discussion group Lab Practice by doing Study Sessions Teach others or immediate use Lab

  5. Why SCIE 0910? • To introduce you to skills that will make you more successful in future science classes • Chemistry • Biology • Physics

  6. Review of Math Principles

  7. Addition • Sum of 2 or more numbers called addends 2 + 4 = 4 + 2

  8. Addition of numbers w/different signs (a good understanding is needed when we work with numbers expressed in Scientific Notation) 4 + 2 = 6 -4 + (- 2)= -6 -4 + 2 = -2

  9. Combine numbers w/same sign 4 + (-5) + (-3) + 7 +(-9) = (-5) + (-3) + (-9) = -17 4 + 7 = 11 Finish the problem: -17+11 = -6 OR 11 + (-17) = -6

  10. Subtraction 4 – (-2) = 4 + 2 = 6 4 – (+2) = 4 -2 = 2

  11. -4 – (+2) = -4 – 2 = -6 -4 – (-2) = -2 -4 + 2 = -2

  12. Multiplying 8 x 4 = 32 (positives) (-6) x (-3) = 18 (negative x negative = positive) (-2) x 4 = -8 negative x positive = negative

  13. More than one number (-2) x 5 x (-3) x 4 = (-2 x 5) x (-3) x 4 = (-10) x (-3) x 4 = (-10) x (-12) = 120

  14. 4 x 3 x 7 x (-3) = 12 x 7 x (-3) = 12 x (-21) = - 252

  15. Dividing Signed Numbers 16 ÷ 2 = 8 (-64) ÷ (-8) = 8 Same signs = positive answer

  16. 210 ÷ (-42) = -5 (-77) ÷ 11 = -7 different signs = negative answer

  17. Fractions • Way of representing the division of a “whole” into “parts” 1 2 • The numerator expresses how many “parts” • The denominator expresses the total number of parts. numerator denominator

  18. Proper Fraction • A proper fraction has a value less than one • The numerator is smaller than the denominator.

  19. Properties of Fractions • Value of a fraction is not altered if numerator and denominator are multiplied • Or divided

  20. Multiplying Fractions By a whole number: 2 3 2 X 6 3 X 1 12 3 4 = = 6 = X

  21. Multiplying Fractions By another fraction: 2 15 2 x 15 30 15 3 16 3 x 16 48 24 X = = =

  22. Dividing Fractions 1 1 ÷ = 2 4 becomes 4 1 x = 2 2 1

  23. Need to be equivalent fractions to add correctly Numerators are added Denominators stay the same 1 + 1=2which reduces to 1 2 2 2 Adding Fractions

  24. Denominator must be the same Usually is the least common denominator (LCD) Change to equivalent fractions EX: ½ + ¼ = 2 2 2 4 2 1 2 + 1 3 4 4 4 4 Adding Fractions = X = + =

  25. Subtracting – same rules as for addition 1/3 – 1/4 = Determine LCD: 1/3 x 4/4 = 4/12 1/4 x 3/3 = 3/12 Answer: 4/12 - 3/12 = 1/12

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