Lab Safety
When an accident occurs you tell
Who is Ms. Ricca?
There is one universal scientific method is true or false
What is false because it is not a linear method, it can be cyclical and move forwards and backwards
Constants are
What is all the variables in the experiment that remain the same?
The opposite of the metric system is
What is the imperial system?
An observation is
Any information collected with the five senses (direct) or with the help of a tool, instrument, or model (indirect)?
The location of the fire extinguisher and fire blanket in our classroom 426 P
What is in the back of the classroom on the right hand side of the wall?
A good hypothesis should contain and not contain
What is not contain "I" statements and does contain an objective phrasing using "If, then, because"
An independent variable and dependent variable are (definitions)
What is...
INDEPENDENT: is the variable that YOU CHANGE in an experiment ON PURPOSE
DEPENDENT: is the variable that is INFLUENCED by the independent variable → the results of your experiment
The SI base unit for
1. Length, Width, Height
2. Mass
3. Volume
What is...
1. the Meter (m)
2. the Kilogram (kg)
3. the liter (l)
An inference is
What is a conclusion or deduction based on observations; the process of drawing a conclusion from given evidence?
Explain three unsafe activities in this image
What is...
1. Broken glass ware on the floor could cause injury?
2. Uneaten food and drink on lab surface could become contaminated?
3. Long hair not tied back near open flame?
An experiment is or is not a fail if your hypothesis was not supported
What is it is not a fail because it provides important information for future work done by scientists interested in the same topic?
The purpose of a control group is to
What is the purpose of a control group is to serve as a means to know if the change has arisen from the treatment in the experimental group?
The steps of the ladder method
What is...
How do you use the “ladder” method?
Find your starting point and ending point
Count the “jumps” to your ending point
Move the decimal point the same number of jumps in the same direction
Place zeros in each space left by a “jump"
The difference between qualitative and quantitative data
What is quantitative data is measureable or countable and qualitative data is describable?
This scientific tool and what it is used for
What is a graduated cylinder used to measure volume very precisely?
The importance of a scientific community
What are...
1. Peer review and Credibility
2. Communicate results
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
Independent variable ___________
Dependent variable _________________
Control ___________________
Constant ____________________________
What are...
Independent variable: Mass of plane
Dependent variable: Distance plane flies
Control: Plane without paper clip weights
Constant: Type of paper used, type of paper clip used, same location, how it was thrown
Convert the following
1. 2000 mg to g
2. 104 km to m
3. 75 mL to L
What is...
1. 2 g
2. 104, 000
3. 0.075. L
Make three observations based on this picture
What is...
1. The wall frame is broken
2. There are glasses on the floor
3. There is a chin-up bar box
4. There is a sofa
The purpose of a fume hood
What is redirects volatile substances?
The steps of the scientific method are
What are...
1. Question: specific and testable
2. Background Research: to fill a knowledge gap
3. Hypothesis: your prediction as an objective statement
4. Methodology: what are the steps you are taking so another scientist can repeat your experiment
5. Experiment!: is your methodology working or not?
6. Analyze Data and Draw Conclusions: is your hypothesis supported by your conclusion or not?
7. Communicate: regardless of results, let the scientific and greater community know
Bart believes that mice exposed to microwaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found that 8 out of 10 of the microwaved mice were able to push the block away. 7 out of 10 of the non-microwaved mice were able to do the same.
Control Group _________________
Independent Variable _______________
Dependent Variable _______________
What should Bart's conclusion be? _______________
What is
Control Group: Mice not exposed to microwaves
Independent Variable: Exposure to microwaves
Dependent Variable: Push the block away or not
What should Bart's conclusion be? Microwaves don't really have an effect on mice pushing block to get food
Read the meniscus
What is 24 mL?
Make two inferences based on this picture
What is...
1. The wall broke and the chin-up bar could not support the person.
2. The person hit their head on the fall and is passed out.