Lab Safety
If you accidentally break a glass beaker in the science lab, what should you do?
Tell the teacher so they can clean it up safely
When writing about candle observations and you note that when the candle was blown out, it smelled like smoke, you were using what organ to make that observation?
Nose
What are the 3 types of graphs?
Bar (Column), Line and Pie
What could possible reasons answer why there were so many different measurements for the perimeter of the door?
The way they laid their hands while measuring, The size of their hand, Gaps in their hands while they measured and People only used whole numbers and not decimals
What is a control group?
A group that DOES NOT contain the independent variable
What is the most important thing to do when reading a set of instructions?
Read all directions first before doing anything
A conclusion based on what was observed is called a(n)........
Inference
What should all bar and line graphs contain?
To calculate perimeter means that you measure what part of an object?
All sides of the object
What is an experimental group?
A group that DOES contain the independent variable
When you are finished with a lab, what should be done with the materials you used during the lab?
They should all be cleaned up and materials should be disposed of properly
What are the 5 senses used in observations?
sight, hearing, touch, smell, taste
What contained the most mass in the piece of gum that was chewed in the lab?
How do you calculate the average of a set of data?
Add all the numbers up to get a total and divide by the number of data entries
What is an independent variable?
something that is changed on purpose in an experiment.
When is it an appropriate time to ask a question about directions while the teacher is reading them?
After the teacher finishes reading all the directions, your question may be answered as they read
What does it mean to observe?
to gather information using at least 1 of your 5 senses
How do you to find the range of a set of data?
Subtract the highest and lowest numbers in the data set
What is a controlled variable?
something that remains EXACTLY the same for an experiment.
When should you wear safety goggles while in the science lab?
When you feel unsafe and want to protect your eyes and When the teacher tells you that you need to wear safety goggles
Mr. Gilmore is looking to order chemicals for the upcoming chemistry unit. He needs to purchase a lot of Hydrogen Peroxide for all the separate investigations. In his planning, he feels that his measured value is 383 liters of Hydrogen Peroxide. Mr. Gilmore finds out that the actual value of Hydrogen Peroxide used for the unit as 400 liters. He understands that he may need to add a bit of a cushion so he includes an uncertainty value of 18 liters. Once the unit begins, did Mr. Gilmore order enough Hydrogen Peroxide at the start of did he need to run out and buy extra? What is the range of uncertainty for Mr. Gilmore?
382 - 418
What is a dependent variable?
something that is measured in an experiment.
If you want to smell a substance what is the proper way to smell something that you do not know what it is?
Waft it to your nose by waving your hand over the substance and bring the smell gently to your nose
Mr. Graves is ordering new spirit wear for the school. He is unsure of the total population of the school and wanted to make sure that he orders enough shirts. His measured value is that there are 535 students. He does a final and accurate count of students and finds that there is an actual value of 550 students in the school. He is unsure of this number, so he gives himself an uncertainty value of 10 students. With his uncertainty, will there be enough shirts for every student? What is the difference between the measured value and actual value?
15
Mr. Gilmore wants to know if he gives teachers candy, it will make them smile more. He gives 50 teachers candy and the other 50 teachers get nothing. He then records the number of times the teachers smiled. 48 teachers who received candy smiled more while only 3 teachers who did not receive candy were found to smile more. Which group of teachers is the experimental group?
The group of teachers who did receive the candy
If you had a book about different science lab activities what should you do after you have chosen a lab activity to do?
Get the teachers approval before starting
Mr. Graves is ordering new spirit wear for the school. He is unsure of the total population of the school and wanted to make sure that he orders enough shirts. His measured value is that there are 535 students. He does a final and accurate count of students and finds that there is an actual value of 550 students in the school. He is unsure of this number, so he gives himself an uncertainty value of 10 students. With his uncertainty, will there be enough shirts for every student? What is the range of uncertainty for Mr. Graves?
540 - 560
Mr. Gilmore wants to know if he gives teachers candy, it will make them smile more. He gives 50 teachers candy and the other 50 teachers get nothing. He then records the number of times the teachers smiled. 48 teachers who received candy smiled more while only 3 teachers who did not receive candy were found to smile more. What is the independent variable?
Receiving candy or not receiving candy