Scientific Method
What are the three metric base units?
Grams, Meters, Liters
Which axis would the independent variable be on?
X
How many fire extinguishers are in the lab?
3
What is the first step of the scientific method? State a ____ (not a hypothesis!)
state a problem/ question
The Variable that the scientist manipulates
Independent
Triple beam balance (or quad beam balance)
Which axis would the Dependent variable be on?
When using the eyewash station, how long do you need to rinse your eyes?
15 minutes
What is the name of the 'unchanged' trial that is used for comparison?
a control group
Counting the number of something is an example of what kind of observation
Quantitative Observation
What is the name of the piece of equipment we used to accurately measure the volume of a liquid?
Graduated cylinder
A student has been given two plants to have in their room. They want to see how increasing the temperature of the water can affect how high the plant grows. Describe what the control group and experimental group should look like.
Control Group - Using room temperature water
Experimental Group - Using hot water
A student accidentally dropped a beaker and it smashes into pieces on the ground. The student picks up the broken pieces of and puts them in the garbage can. The student leaves the lab without telling anyone because they are scared they would get in trouble. Name all the things they did wrong.
1. Picking up glass with hands
2. Putting glass in garbage (should go in broken glass container)
3. Didn't tell the teacher
Describing the quality of something is an example of what kind of observation
Qualitative
What is the symbol of the unit for temperature in metric units?
°C
An apple is cut into slices. Half of the slices are sprayed with lemon juice. All slices are stored in a sealed plastic bag. After 4 days, they are observed to see how brown they turned.
Determine the independent and dependent variable
Independent - Lemon Juice
Dependent - Amount of browning on slice
A student is doing a chemical experiment and a small fire was started in the beaker. What should piece of safety equipment is best suited for this situation?
Fire bucket (or sand in fire bucket)
factors that must be kept the same throughout the whole experiment.
A Controled Variable
What is the last step of the scientific method and why is it important?
Communication and Conclusion. This is to allow other scientist to check your work and confirm your findings
To measure the volume of an irregular object you should use this technique
Water Displacement (or a correct description)
Eric wants to see if a Shark vacuum works better than his current Oreck. He makes
sure both of the vacuum canisters are empty, and then vacuums half of the living
room with the Oreck and the other half with the Shark. After vacuuming he
measures the amount of dust in each canister.
Identify the independent, dependent, and control group in this experiment.
Independent - The type of vacuum
Dependent - Amount of dust
Control group - Oreck vacuum
When using a graduated cylinder to measure the volume of a liquid, your eye needs to be level with the bottom of the _____________
meniscus