1- Physical Science 2- Earth and Space Science 3- Life Science
study of matter and energy
the methods you use to find out about something KEY NOTE: Science begins with curiosity and often ends with discovery
Ways to solve practical problems
EXAMPLES of technology (updating inventions) Little house on the prairie used a wood burning stove, my mom used an oven, we now have microwaves.
1- an experiment where only one variable (the manipulated variable) is changed on purpose at a time 2- when the responding variable is observed for changes, all other variables are kept the same or controlled
is a proposed answer to a question
also called the independent variable. A variable that you cause to change during an experiment in order to see its effect or change on something else.
1- this makes it easier to understand something that might just be too difficult to observe otherwise EXAMPLE: If you got lost in a city you could use a street map .
information gathered by using your senses Senses: Seeing, Smelling, Touching, Hearing, Tasting
also called the dependent variable. A variable that changes because of the manipulated variable. The change is measured by the experimenter.
a statement that describes a pattern observed in nature "the law of gravity"
this is an organized plan scientists use to get, organize and communicate information
1- this is an explanation of an experiment that has been run many times. 2- once a hypothesis is supported in repeated experiments, scientists can start to develop it.
being as close as possible to the known value. If the known value is 12.01, then 12.02 would be more_____________ than 12.08.
the ratio of an object's mass to its volume grams/cubic centimeter equals mass divided by volume
the straight line distance between two points. The metric base unit is the meter
the quantity of matter in an object or sample base unit is the gram
an EXACT way to measure EXAMPLE: a digital clock read to the 100th of a second is more exact than a regular clock with hands.
1- this is the way of expressing a very large or small value by using a number between 1 and 10, multiplied by 10 to an exponent. EXAMPLE: 120,000,000 = 1.210 to the 8 power and .0012 is 1.210 to the negative 3 power
SI (International System of Units)
Scientists use a system of measuring units that is based on the number 10
an instrument that measures temperature
the amount of space an object takes up base unit is the Liter for liquids or can be a cubic length
Scientists tell others there results by: a) writing in a scientific journal b) speaking at conferences
a relationship between 2 variables in which their ratio is constant and Y changes in the same direction as X. X goes up, so does Y
An inverse proportion is one in which the product of the two variables is constant and X and Y move in different directions.
a graph that is useful to show changes that occur in related variables. The independent variable is on the X and the dependent on the Y.
1- Scientists organize data by using tables and graphs
EXAMPLES: a) data tables b) line graphs c) bar graphs d) circle graphs
scientists examine other scientists work
On the line graph, the ratio of the change in the y-variable to the corresponding change in the x-variable
1- rise/run = change in y / change in x, 2- The steepness of a line on a graph
Starts at absolute zero and water freezes at 273 degrees.
Water freezes at 0 on this scale and boils at 100 degrees on this scale. Fahrenheit can be converted to this scale using C=.57(F-32)