Vocabulary
An experiment where only one thing changes
Controlled Experiment
Graph used commonly in science
Line Graph
Tell the purpose of the experiment
Problem
The number one lab rule
Follow all directions carefully
Prefixes:
1000
100
1/10 or 0.1
1/1000 or 0.001
Kilo
Hecto
Deci
Milli
The units used to measure mass, length, and volume
Grams, Meters, Liters or Centimeters
Graph used for comparison, Graph used for percentages
Bar, Pie
Steps of the scientific method
Make an observation, ask a question, form a hypothesis and make a prediction, experiment, analyze date and draw a conclusion
What does the biohazard symbol mean?
You are dealing with dangerous live organisms.
34km = ______mm
34000000
A representation of something that is real
Model
Variable found on the X axis, Y axis
Independent Variable, Dependent Variable
What does the acronym CER mean? Which one is the hypothesis?
Claim, Evidence, Reasoning; Claim
Name three lab tools that are calibrated.
Ruler, Graduated cylinder, Triple beam balance
4 x 10^6 - 20 x 10^5
2 x 10^8 + 400 x 10^6
2 x 10^6
6 x 10^8
A natural phenomenon in life; an explanation of a natural phenomenon in life; a testable explanation
Law, Theory, Hypothesis
Proportionality when the lines move upward; when lines move downward
Directly proportional, Inversely Proportional
Why does the mass increase when steel wool burns?
Since oxygen atoms have mass and are joined to the iron atoms, the resultant compound weighs more.
Name the flask used in lab that is named after a person starting with the letter "E."
Erlenmeyer flask
Significant Figures:
22 x 42 =
23.44 - 45.6
920
-22.7
How close measurements are to each other; how close measurements are to true value
Precision, Accuracy
Graph that shows that as X increases, Y also increases; when X increases, Y decreases
Directly Proportional, Inversely Proportional
Experimental variables:
1. the variable that changes or is controlled by the experimenter
2. the variable that shows the results; measurements, numbers or scores
3. the variable that shows comparison
4. the things that stays the same
1. Independent or Manipulated Variable
2. Dependent or Responding Variable
3. Controlled Variable
4. Constants
1. Tool that creates fire
2. Holds test tube
3. Tool with two sides of measurement
Bunsen burner
Test Tube holder
Beaker
(3.0 x 10^4)(4 x 10^7)
12 x 10^7/6 x 10^-9
1.2 x 10^12
2 x 10^16