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1st 9 week review
Motion and the scientific method
41
Science
9th Grade
09/30/2012

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Cards

Term
Scientific method
Definition
A process to solve a problem, ask a question, research the problem, form a hypothesis, test the hypothesis, collect and analyze data, draw a conclusion and finally publish the results.
Term
Hypothesis
Definition
An expectation based on research
Term
Analyze Data
Definition
Explain what happens during an experiment based on the data collected.
Term
Dependent variable
Definition
The factor whose value changes because of a change in the independent variable. (How the size of the soap bubbles changed because of what you added to the control –Mrs. Unger’s soap bubble solution.)
Term
Pure Science
Definition
The gathering of new information or the discovery and adds to the body of scientific knowledge.
Term
Law
Definition
A rule of nature that sums up related observations and experimental results to describe a pattern in nature.
Term
Draw a conclusion
Definition
After analyzing the data of an experiment decide if the hypothesis can be accepted or rejected.
Term
Meter
Definition
A metric measurement used for measuring length. 100 cm = 1 meter. A meter is similar to a yard in length.
Term
Data
Definition
Information collected during an experiment. May be quantitative – backed up with numbers.
Term
Constant
Definition
The things that do not change in an experiment. (The bubble blower, to table, the amount of water on the table…)
Term
Inference
Definition
To draw a conclusion based on information given.
To infer is to assume.
Term
Physical Science
Definition
The study of matter and energy.
Term
You do this to test a hypothesis.
Definition
Create/preform an experiment
Term
Independent variable
Definition
The factor adjusted to a different value by the experimenter to see what effect is will have on the dependent variable. (The soap, sugar or other substances you brought in for the bubble lab.)
Term
Theory
Definition
An explanation based on many observations supported by many experiments.
Term
Control
Definition
A standard for comparison in an experiment. This must not be changed.
Term
Millimeter
Definition
One hundredth of a meter. A millimeter is a very small length similar to 1/32 of an inch.
Term
Air Resistance
Definition
Frictional force in air - as speed increases so does air resistanc. Also called fluid friction.
Term
Average speed
Definition
A rate of motion determined by dividing the total distance traveled by the total time.
Term
Balanced Forces
Definition
Forces that are equal in size and opposited in direction. If the forces are balanced there will be no change in motion.
Term
Liter
Definition
A metric measurement used for measuring liquid volume. Similar to a quart.
Term
Deceleration
Definition
Negative acceleration - slowing down.
Term
Friction
Definition
The force that opposes motion between two surfaces that are touching. Rolling, sliding, fluid and static friction.
Term
Celcius
Definition
Water freezes at zero and boils at 100 degrees on this scale.
Term
Line plot
Definition
A graph used to show how something has changed over time. (The dots are connected!)
Term
Force
Definition
A push or a pull
Term
Gravity
Definition
A force that pulls. Depends on mass of two objects and distance from each other.
Term
Velocity
Definition
Speed + direction. V = d/s unit are in m/s.
Term
Meniscus
Definition
The curved surface of a liquid. Should be level when trying to measure volume in a graduated cylinder.
Term
E-flask
Definition
A container that is wide at the bottom and narrow at the top. A cork can be used to seal it.
Term
Beaker
Definition
A container used to hold liquid – but not truly measure them accurately.
Term
Graduated cylinder
Definition
A tall slender contain that is used to measure liquids accurately.
Term
Mass
Definition
The amount of matter in an object and it is measured in grams.
Term
Scatter plot
Definition
A graph used to show relationships between many different pieces of data that may have a positive, negative relationship or may not be related at all.
Term
Speed
Definition
The rate of motion, or rate at which a body changes position.
Term
Waft
Definition
A simple way to “dilute” strong fumes. (Wave you hand across a chemical to enable only a small amount of the odor to be smelled)
Term
Acceleration
Definition
The rate of change in velocity. Final velocity – initial velocity divided by the time it takes to change velocity.
Term
Density
Definition
The amount of mater in a given space. D = mass/volume.
Term
Goggles
Definition
These are needed anytime you use glassware, heat a substance or use chemicals.
Term
Apron
Definition
These are used when chemicals may splash on your clothes. Some also protect you against flames and corrosive chemicals.
Term
Standard Notation
Definition
An way to write very large or small numbers.
Example: 0.00000345 = 3.45 x 10^ -6 and 12,000,0000 = 1.2 x 10^7
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