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Scientific Method Lab Equipment Safety 10 Point 20 Points 30 Points 40 Points 50 Points 10 Point 20 Points 30 Points 40 Points 50 Points 30 Points 40 Points 50 Points VariablesConversions
1m Km
0.001 Km
49 g mg
49,000 mg
6.7 cL ml
67 ml
83 dm μm
8.3 x 10^6
756 ng g
7.56x10^-7
What is the first step for any scientific investigation?
Observation
What is the difference between a hypothesis and a theory?
Hypothesis: a proposed explanation Theory: an organized collection of data, observations, hypothesis and information
Measurements made during an experiment are called…
Data
What is a controlled experiment?
Experiment where only ONE variable is changed
Explain the difference between a control group and an experimental group
Experimental group: everything is the same as the control group EXCEPT for one variable
What is an independent variable?
The variable deliberately changed by the researcher
The variable that changes in response to the independent variable.
What is… the dependent variable?
Give the independent variable for the following: Children who drink two glasses of soda a day will be on average two inches shorter than those who do not drink soda.
Glasses of soda
Give the dependent variable for the following: Apple trees that receive the most amount of sun produce the biggest apples.
Size of apples
Give the independent AND dependent variable for the following: The age that a bunny lives to varies greatly according to the amount of carrots that it consumes each day.
Independent: Amount of carrots Dependent: Age of bunny
Test Tube Rack
What is…used to hold test tubes?
Graduated Cylinder
What is… used to determine precise volume of liquids?
Scale
What is… used to measure the mass of an object?
Test Tube
What is… used to mix and heat small quantities of reactants?
Erlenmeyer Flask
What is… used for mixing solution when swirling or boiling is required?
Fire Blanket
What is… put out a fire on a person?
Eye Wash Station
What is… used to rinse out eyes in case of splash, irritation, etc?
Goggles
What is… used to protect eyes during lab experiments?
Demo Lab Table
What is… used to demonstrate safe techniques in the lab?
Emergency Stop
What is… used to turn off electricity and gas to all lab stations?
Make your wager
How does science influence society?
Solves problems, advances technology, higher quality of living, increasing human understanding, etc