Lab Safety
True/False When working in the lab, you should always tie back long hair, secure loose sleeves or other loose articles of clothing
TRUE
What is used to measure mass of an object in grams?
TRIPLE BEAM BALANCE
The first step of the scientific method is
MAKE OBSERVATIONS
A student designed an experiment to determine if air temperature had an effect on the rate of photosynthesis in corn plants. What is the IV in this experiment?
AIR TEMPERATURE
Diagrams, tables, and graphs are used by scientists mainly to organize what in an experiment?
DATA
If you break glassware during a lab you should ______________ immediately.
TELL YOUR TEACHER!
Used to measure length and distance in the metric system
RULER
Another word for a prediction or educated guess about the outcome of your experiment is: ________________
HYPOTHESIS
An experiment was designed to test the effect of exercise on the ability to squeeze a clothespin. The number of times the clothespin was squeezed served as the
DEPENDENT VARIABLE
The current knowledge of the structure of the atom is the result of the investigations and observations of many scientists. The work of these scientists forms a well-accepted body of knowledge about the atom. This body of knowledge is an example of a scientific
THEORY
TRUE/FALSE
It is OK to start a lab before you read all the directions.
FALSE
What is used to measure the volume of liquids?
GRADUATED CYLINDER
After the experiment is complete, what is the summary at the end of an experiment that explains the results.
CONCLUSION
Max is rolling a car down a ramp. Max thinks that cars roll faster on steeper ramps. What is Max's independent variable?
Height of the ramp
Steepness of the ramp
The ramp
When does an idea become a theory?
When it has been tested many times and most people believe/prove it to be true.
Read all ________________________ before beginning an experiment and ask questions if you are unsure of anything.
DIRECTIONS
What is used to measure, heat, and mix large amounts of liquids?
BEAKER
In science, every proper hypothesis should follow this format....
IF..... THEN......
Max is rolling a car down a ramp. Max thinks that cars roll faster on steeper ramps. What is Max's dependent variable?
How fast the car rolls
Speed of the rolling car
Rolling car speed
Time it takes car to roll down the ramp
Why would repeating an experiment be a good idea?
To see if the results are the same
Safety goggles should be worn during the laboratory experiments to…
PROTECT YOUR EYES
What is used to protect your eyes from chemicals, broken glass, and fire?
SAFETY GOGGLES
George: Here are pictures of my three children.
Mary: How nice; how old are they?
George: You’re a scientist, you figure it out.
Mary: OK, give me a hint.
George: If you multiply their ages, the result is 36.
Mary: I need more information.
George: If you add their ages, the sum is the age of your oldest child.
Mary: I almost have it, I need one more clue.
George: The blue eyed child is the oldest.
Mary: I figured it out using the scientific method.
What is the "problem" being investigated here?
How old are George's children?
The age of George's children
Max is rolling a car down a ramp. Max thinks that cars roll faster on steeper ramps. What could be a constant?
Type of car/Size of car
Weight of car
Surface of the ramp (grass vs concrete vs rocks)
When is a hypothesis made?
Before the experiment
Before the investigation starts