welcome to scie 0910
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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 - PowerPoint PPT PresentationTRANSCRIPT
Welcome to SCIE 0910
Why do we study science?
1. Need a basic understanding of science2. Difference between science and
technologyScience = process to understand and explain the natural worldTechnology = application of scientific principles
3. Helps us to make informed decisions4. Using the Scientific Method to approach
a problem and find a reasonable solution.
To be successful in the study of science; you must….
1. Identify and locate information to be learned
2. Organize the information so it can be learned efficiently and effectively
3. Interpret the spoken, written and symbolic language of science
4. Use and apply the information you have learned.
The Learning Pyramid
Listen
Read
Audiovisual
Demonstration
Discussion group
Practice by doing
Teach others or immediate use
Lecture
Lecture
Lecture & Lab
Lab
Lab
Study Sessions
Study Sessions
Study
Sessions
Why SCIE 0910?
• To introduce you to skills that will make you more successful in future science classes
• Chemistry• Biology• Physics
Review of Math Principles
Addition
• Sum of 2 or more numbers called addends
2 + 4 = 4 + 2
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
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
Subtraction
4 – (-2) = 4 + 2 = 64 – (+2) =4 -2 = 2
-4 – (+2) =-4 – 2 = -6
-4 – (-2) = -2-4 + 2 = -2
Multiplying
8 x 4 = 32 (positives)
(-6) x (-3) = 18 (negative x negative = positive)
(-2) x 4 = -8 negative x positive = negative
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
4 x 3 x 7 x (-3) = 12 x 7 x (-3) = 12 x (-21) = - 252
Dividing Signed Numbers
16 ÷ 2 = 8(-64) ÷ (-8) = 8Same signs = positive answer
210 ÷ (-42) = -5(-77) ÷ 11 = -7 different signs = negative answer
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
Proper Fraction• A proper fraction has a value less than one• The numerator is smaller than the
denominator.
Properties of Fractions• Value of a fraction is not altered if
numerator and denominator are multiplied
• Or divided63 x 233 x 1
Multiplying Fractions
By a whole number:
2 3 X 6 =
2 X 6
3 X 1
=12
3= 4
Multiplying Fractions
By another fraction:
2 15 2 x 15 30 15 3 16 3 x 16 48 24X = = =
Dividing Fractions
1 ÷ 1=
2
4
becomes
12 x
4
1=
2
Adding Fractions
• Need to be equivalent fractions to add correctly
• Numerators are added• Denominators stay the same
1 + 1 = 2 which reduces to 1
2 2 2
Adding Fractions
• Denominator must be the same• Usually is the least common denominator (LCD)• Change to equivalent fractions
• EX:½ + ¼ = 1 2 22 2 4
2 1 2 + 1 3 4 4 4 4
X =
+ = =
Subtracting – same rules as for addition
1/3 – 1/4 =Determine LCD:
1/3 x 4/4 = 4/121/4 x 3/3 = 3/12
Answer:4/12 - 3/12 = 1/12