Science
A process that uses observation and investigation to hain knowledge about events in nature.
The word "science" comes from the Latin word ______. What does this mean?
Scienta. Knowledge.
List the 3 main categories of science.
a. Life Science: deals with living things
b. Eath Science: investigates Earth and Space
c. Physical Science: Deals with matter and energy
Why do scientific explanations change?
More is learned about the natural world
An organized set of investigation procedures most scientists follow is called the?
Scientific Method
List the 6 common steps of the scientifc method.
a. Observing and Stating the problem (wondering why or how something happens)
b. Gather information (Before testing learn as much as possible about your hypothesis)
c. Form a hypothesis (Possibe explanation for a problem using what you know and observe)
d
What is an experiment?
Tests the effect of 1 thing on another using controlled conditons.
A _______ is a quantity that can have more than a single value.
Variable
What are the two types of variables found in most experiments?
Dependent (Its value changes according to the changes in the independent variable)
Independent (What is tested. Only one change one at a time.)
A factor in an experiment that does not change when other variables are changed is called?
Constant
The _______ is the standard by which the test results can be compared.
Control
Why is it important to have a control in an experiment?
You can compare it to what is being tested.
What must the experimenter do if their hypothesis is not supported?
Reconsider the hypothesis. Also change procedure.
What must the experimenter do if their hypothesis was supported?
Repeat the experiment multiple times until they get the same result EVERY time.
What must happen for an experiment to be considered valid?
Must be tested multiple times, each time resulting in the SAME result.
What is a scientific law?
A statement about what happens in nature and that seems to be true all the time. (Does NOT explain why or how something happens)
The application of science to help people is?
Technology
A _______ is an exact quantity that people agree to use to compare measurements.
Standard
What is the metric system?
A system of measurment based on multiples of 10.
Which system of measurement is most often used in the US?
English
______ is just an improved version of the metric system devised in 1960. This system is universally accepted and understood by all scientists. This system is based on multiples of ____.
SI (international system of measurement)
10
What are the base units for the following?
Length
Time
Mass
Electric Current
Temperature
Amount of Substance
Intensity of Light
Meter
Second
Kilogram
Ampere
Kelvin
Mole
Candela
What do the following mean?
Kilo
Deci
Centi
Milli
Micro
Nano
1,000
0.1
0.01
0.001
0.000001
0.000000001
A conversion factor is a ratio that is equal to?
1
Length can be measured in many ways, it is important to choose the appropriate unit. The base unit for length is?
Meter
The amount of space occupied by an object is called?
Volume (always cubed)
What is the formula for calculating the volume of a square or rectange?
L times W times H
The measure the volume of a liquid the vase units used are?
Liters (L) and Milliliters (mL)
_____ is a measurement of the quantity of matter in an object.
Mass
What is a derived unit?
A unit obtained by combining different SI units.
The _______ is the mass per; unit volume of a material. What is the formula?
Density.
d=m/v
The SI unit for time is?
The Second
Most of the time, temperature is measured in the ______ scale. The freezing is _____, and the boiling point is ______.
Celsius.
0 C
100 C
The actual SI unit for temperature is _____
Kelvin
What is absolute zero?
Coldest possible temperature. (-273 degrees)
A visual display (or representation) of information or data is called a _____.
Graph
Scientists many times graph their data to detect ______
Patterns
What are the three common types of graphs?
Line, bar, and circle
_______ show the relationship where the dependent variable changes due to a change in the independent varaibel. Show the relationship between two variables as they change over time.
A line graph
The x-asis always represents the
Independent Variable
The y-axis always represents the
Dependent Variable
A _______ is used for comparing information collected by counting?
Bar graph.
Another name for a circle graph is a _______. This type of graph shows how a fixed quantity is broken down into parts or percentages.
Pie graph.