Lab Safety/ Lab Equipment/ Variables Flashcards
What is a variable?
Factors that are examined in an experiment to test a hypothesis that can change in an experiment.
What is independent variable also known as?
Manipulated variable.
What is a manipulated variable/ independent variable
It is what is changed in an experiment .
How to remember independent variable?
I for “I can change.”
Explain how DRY MIX helps with graphs?
DRY is for dependent responding y-axis
MIX is for manipulated independent x-axis
Explain how to know when to make a line graph vs. bar graph.
Line graphs are used for smaller changes and bar graphs are used for bigger changes.
What are line graphs used to track?
Line graphs are used to track changes over short and long periods of time.
What are bar graphs used to track?
Used for comparing things between different groups or to track changes over time, better to use when changes are longer
What is a manipulated variable.
Variable that changes
What is a responding variable.
Variable that is measured, what changes as a result of the independent variable changing.
Liquid volume. What is the lab equipment used to find this and the measure?
Graduated cylinder.
L or ML
Explain meniscus. And explain how to read it.
Curved surface of water in the cylinder.
To read it, you read the lowest point of it.
What is the formula triangle for density?
M at the top
D and V and the bottom.
M for mass. D for density. And V for velocity.
Ebony has a density of 1.2 g/cm^3 and a volume of 2cm^3. Determine the mass = ———-
2.4 grams
Mass. What is the lab equipment used to find this and the measure?
A balance.
Grams and kilograms.
Density. What is the lab equipment used to find this and the measure?
Volume of a box. What is the lab equipment used to find this and the measure?
Volume of a box. What is the lab equipment used to find this and the measure?
Formula- LWH.
Cm^3/ML
When should students wear safety goggles?
Whenever working with chemicals, burners, and glassware, or any substance that could get in your eyes.
What should you do if there is a spill or break during a lab activity?
Tell the teacher, wash the spill with a base or water depending on the substance as instructed by the teacher.
