In scientific notation, how is the exponent affected when the decimal is moved to the right?
When the exponent is moved to the right, the exponent decreases.
Why should you never heat something in a closed container?
Expanding gas may explode
Why must 100 = 1? A rule holds with all numbers that when
you divide the same base that is raised to a power, you subtract the exponents. Since we already know that when you divide a number by itself the answer is one, 100 must equal one
101
deka, da
How do you write 0.007 in scientific notation and fractional form?
.007 7x 10-3
7/1000
10-12
pico p
A factor (number or concept) that does not change when other variables change
Constant
What is the difference between a base unit and a derived unit?
A base unit is a single unit where a derived unit is a combination of base units.
A representation of an idea, event, or object to help people understand it.
Model
A type of experiment done to eliminate bias. Neither the subjects nor the researchers know who or what is the experimental or control group.
Double blind experiment
Information that cannot be assigned a numerical value
Qualitative data
How do you test a hypothesis? Perform an experiment
Reading into a graph from beyond the given data. Making a guess or an estimate
Extrapolate
Name the instrument and state its purpose
Test Tube: Used to mix, measure, or heat liquids
103
Kilo k
1012
Tera T
Why was scientific notation developed? To write very small numbers and very
large numbers with ease To simplify scientific calculations
What is this and what is its purpose?
Triple Beam Balance; Measures mass in grams
Why should no experiment be considered a failure?
An experiment with unexpected results provides a chance to learn something new. Excluding possibilities is as important as the discovery.
Why have we not yet fully adopted the metric system?
We were already significantly more advanced in industry when the rest of the world adopted the metric system. Because of the cost involved in switching over, we developed a 50 year plan. It has been 60 years
SI unit for luminous intensity? Candela
A ratio equal to one that expresses the same quantity in 2 different ways.
Conversion factor
Mass of 0.001 cubic meters of water. Kilogram
The mass of one specific platinum-iridium alloy cylinder.
Kilogram
What is the equation for percent error? |ValueA –ValueE| / ValueA X 100
What are the 7 base quantities and units in the SI system?
Length Meter
Mass Kg
Time Second
Temperature Kelvin
Electric Current Ampere
Amount of a Substance Mole
Luminous Intensity candela
The continuing search for scientific knowledge. Studying natural phenomena simply for the purpose of increasing our knowledge.
Pure science
Deci 10-1
Tera 1012
Exa 1018
The identification of the components and composition of materials
Analytical chemistry
An inaccuracy in reading a measurement based upon angular difference
Parallax
A hydrogen atom has a diameter of 10nm. Express this in mm
1x10-5 mm
9,192,631,770 times the period of a radio wave emitted from a cesium-133 atom
A second
Peta 1015
When is it ok to use broken or chipped glassware?
NEVER
106
Mega M
What are the basic steps in the scientific method?
Why is this incorrect? 1 cm=_____m (1cm)(1m/10-2 cm) Although centi does mean 10-2 , 1m is
not equal to that.
When is it necessary to wear safety goggles and an apron?
When using heat, chemicals, or glassware
Name Symbol #
Pico p 10-12
Nano n 10-9
Micro µ 10-6
Milli m 10-3
Centi c 10-2
Deci d 10-1
Tera T 1012
Giga G 109
Mega M 106
Kilo k 103
Hecto h 102
deka da 101
The group designed with a variable to test the hypothesis
Experimental group
Mass/Volume; kg/m3 Density
Springs, Pendulums, Sound Vibrations and Wave Phenomena
This type of graph is used to compare or contrast data
Bar graphs
Using specific observations and measurements to enable a scientist to arrive at a generalized explanation of a scientific problem which can be expressed as a hypothesis or theory
Inductive Reasoning
A mathematical or numerical statement that describes a phenomena or event
Applying logic and reason to observations and conclusions
Critical thinking
A property that depends on the amount of matter present
Extensive property
Giga 109
A property that doesn’t depend on the amount of matter present
Intensive property
Two branches of Earth Science are… Geology and meteorology
Graphs best used to show a trend. Graphs that show how one variable changes with respect to another
Line graph
A graph used to show the parts of a whole
Circle graph or pie chart
What are three standards that a theory must meet?
Must explain observations, must be able to repeat experiments, and must be able to predict from the theory
Two branches of physical science are… Physics and chemistry
A system of knowledge based on facts or principle
science
What are the two main branches of science?
Social science and natural science
What is the SI unit for length? meter
What is the SI unit for time? seconds
The total distance covered divided by the total time
Average speed
What is the difference between speed and velocity?
Velocity is a vector while speed is merely a magnitude. Vector quantities have both magnitudes and direction while scalar quantities such as speed have only a magnitude.
What does the area beneath a v-t graph represent
Distance
What is the difference between distance and displacement?
Distance is the sum of the total lengths traveled while displacement is the straight line distance between the start and end points
What is the SI unit for velocity? m/s
What is the SI unit for time? second
A complete explanation of how or why something happens based on research and testing
theory
Name this instrument and its purpose
Erlenmyer flask; used to mix liquids
A standard by which results are compared
control
A statement that seems to always be true
Law
What would be the SI unit for electric charge?
The coulomb
10-9 nano
Any type of information that can be expressed as a number
Quantitative data
An explanation of an event based on knowledge gained from observations
theory
What should be done prior to starting an experiment?
READ DIRECTIONS
A value that changes because of the other variables in the experiment
Dependent variable
In scientific notation how is the exponent affected when the decimal is moved to the left
The exponent increases
A quantity that can have more than a single value
variable
The variable that is changed to see how it affects the dependent variable
Independent variable
What is the SI unit for the amount of a substance?
mole
A statement that gives the best possible response to the question and should be based on already known facts. May not yet be tested. An educated guess
hypothesis
10-3 milli
How do you write 0.1 in scientific notation and fractional form?
1x10-1 1/10
109 Giga
The group in an experiment that is maintained at a constant state for the course of the experiment
Control group
Does the speedometer of a car read instantaneous speed or average speed?
Instantaneous speed
The rate at which velocity changes acceleration
What is the SI unit for acceleration? m/s/s
What does the slope of a v-t graph represent?
acceleration
What does the area beneath an a-t graph represent?
velocity
Speed at any instant Instantaneous speed
A type of velocity that does not vary Constant velocity
What is the unit for distance? Meter
What does the slope of a d-t graph represent?
velocity
Why are the constant speed and constant velocity not the same?