Describe the result of adding a large positive number and a smaller negative
number Answer✓✓ result is smaller positive number, same as ignoring the signs
and subtracting smaller number
How do you convert a fraction into a decimal? Answer✓✓ Divide the top number
by bottom number
What is the key step in order to add or subtract unlike fractions Answer✓✓ finding
the lowest common denominator
How do you divide one fraction by another Answer✓✓ Invert divisor (flip over the
second fraction) and multiply both numerators and denominators (top and bottom
numbers)
How can you convert a decimal into a percent Answer✓✓ Multiply decimal by
100 and add % sign, or move decimal TWO places to the RIGHT and add %
How do you convert a fraction to a percent Answer✓✓ Convert to decimal, move
decimal two places to the right, add %
How do you change a decimal to nearest equivalent fraction Answer✓✓ Multiply
decimal by desired denominator, result becomes numerator of fraction (try to get
closest to whole number)
Two different ways a ratio can be expressed? Answer✓✓ 1- as a fraction
2- placing a colon between the numbers (5:54)
3- using the word “to” between the numbers
What is a proportion? Answer✓✓ a statement of equality (=) between two or more
ratios: 1/2 = 4/8, 45/90 = x/100
What is meant by the root of a number? Answer✓✓ A root is two or more equal
smaller numbers that when multiplied equal the specified number: the second
(square) root of 9 is 3, the fifth root of 32 is 2
How do you find the square of a number? Give an example. Answer✓✓ multiply
the number times itself- 4 X 4=16, 10 X 10= 100
What is a common method of making computations involving very large or very
small numbers more manageable? Answer✓✓ Convert the numbers into scientific
notation by using powers of 10. (7,234,000= 7.234 X 10^6)
How is 100,000 expressed as a power of 10? Answer✓✓ 10 to the fifth
what formula is used to find the area of a rectangle? Answer✓✓ A=L(length) X
W(width)
Area of a triangle? Answer✓✓ 1/2 X B (base) X H (height)
Define Pi Answer✓✓ A constant that expresses the relationship between
circumference and diameter of a circle, approximately 3.14159 (number of times
the diameter goes into the circumference)
Describe a trapezoid Answer✓✓ A trapezoid is a closed, four-sided figure having
two parallel sides and two sides that are not parallel.
What is the formula for the area of a circle? Answer✓✓ A = Pi X Radius squared
(radius is half diameter)
Define matter Answer✓✓ Any substance that occupies space and has mass
Name three states of matter Answer✓✓ Solid, Liquid, gas
Define kinetic energy Answer✓✓ the energy of motion
Work is the product of what two factors? Answer✓✓ Force and distance moved
(W = F X D)
What are the parts of a lever: Answer✓✓ A rigid bar and a pivot point called the
fulcrum
A wheelbarrow is what class of lever? Answer✓✓ second class (first class: seesaw, third class: tweezers)
Are all three states of matter affected by thermal expansion? If so, which is
affected most? Answer✓✓ All three are affected, gases are affected the most
What is a British Thermal Unit? Answer✓✓ The amount of heat energy required
to change the temperature of 1 pound of water 1 degree Fahrenheit
Three methods of heat transfer? Answer✓✓ Conduction, convection, radiation
What term defines the temperature at which all molecular activity stops?
Answer✓✓ Absolute zero
Can liquids be compressed? Answer✓✓ No, liquids are generally considered
incompressible
What are the units used to express hydraulic or pneumatic pressure Answer✓✓
Pounds per square inch (PSI)
Describe how pressure is transmitted when a force is applied to a confined liquid
Answer✓✓ Pressure is transmitted equally in all directions
What formula expresses the relationship between force, pressure, and area
Answer✓✓ Force = Area X Pressure (F over A I P)
What is the approximate speed of sound at sea level on a standard day?
Answer✓✓ 661 knots or 340 meters per second
What is the atmospheric pressure at sea level on a standard day? Answer✓✓ 29.92
inches mercury or 1013.2 millibars
On a standard day at sea level, what is temperature? Answer✓✓ 59 degrees
Fahrenheit, 15 Celsius