Measurements/Data
You have an object with a mass of 10 g and a volume of 2 cm3. What is it's density?
D=m/v
10g /2cm3 = 5 g/cm3
Someone spills a chemical on their hand, what do you do?
Tell teacher and wash with soap and water.
When reading a temperature off a thermometer, what degrees should we be reading from?
Degrees Celsius
52 cm = ? m
0.52 meters
You have an object with a length of 7m, a width of 3m, and a height of 4m. What is it's volume?
l x w x h
7m x 3m x 4m = 84 m3
Harry is horse playing in the lab and jokingly hovers his lab worksheet above a lit Bunsen burner. It catches on fire. What do you do?
Bonus 100: What happens to Harry?
Tell the teacher and get the fire extinguisher.
Bonus: Harry gets kicked out of lab, gets a 0, and ruins lab for the rest of the class.
Situation: You're working with two different clear chemicals in the lab. You forget to label the beakers, and get them mixed up. What do you do?
Tell the teacher. We will properly dispose of both and get you brand new chemicals to work with.
What do we use to measure mass?
Triple Beam Balance
How many seconds are in 1 hour?
3,600 seconds
What are the units for liquid volume vs solid volume?
L or mL vs m3 or cm3
While in lab, Demi decides to take off her goggles and put them on her head. She starts interacting with an unknown powder substance. A few minutes later, she rubs her eyes, and is now experiencing an extreme burning sensation in her eyes. What did she do wrong and what should she do now?
Wrong: Not keeping goggles on for the entirety of the lab.
She should tell the teacher and use the eye wash for 20 minutes.
They're forgetting to clean and put away materials how they found them, push in lab stools, put safety gear away, and wash their hands. You should remind them/tell them to come back and also tell the teacher if they still choose to not participate in clean up!
What do we use to measure the volume of a liquid MOST ACCURATELY?
Graduated cylinder
Name 3 base units.
meter, second, mole, kilogram, kelvin
Katy is performing an experiment. She wants to find out how music affects plant growth. In one room she leaves a plant with no music. In another room, she leaves a plant with classical music. Another with rock music. And another with pop music. What are the independent and dependent variables in her experiment?
Independent: Types of music
Dependent: Plant growth
In lab, Josh forgets to take his baggy sweatshirt off. He reaches to grab something, and accidentally lights his sleeve on fire with a Bunsen burner. What should his classmates/teacher do ASAP?
Situation: We are mixing a powders and liquids but you forgot the order in which to do so. What are the 3 steps to take if you don't know what to do/don't understand something in lab?
1. Re-read the directions fully and carefully.
2. Clarify with 3 classmates.
3. Ask the teacher as a last resort.
You want to obtain the mass of a powder/substance using a digital scale and a paper cup. What's the proper way to do this using these materials?
Set the paper cup on the scale, zero/tare it out, then add the substance into the paper cup to measure it's mass.
kilo is 10? and is equivalent to __?
103 aka 1000
The volume in a graduated cylinder before an object is 50 mL. An object is dropped in the graduated cylinder. The volume raises to 57 mL. What is the volume of this object? (don't forget correct units!)
57-50= 7 cm3
Again, liquid volume = mL & solid volume = cm3
If there's an emergency and I'm unable to respond what are two things you can do?
Call the front office, 911, or get another surrounding teacher.
Situation: You're told to mix water with an acid. How do you safely do this?
Put the water into a container first, then slowly and carefully add in the acid.
What are the lines on a graduated cylinder called? What is important to recognize about them when you're trying to read a volume?
Graduated marks. You must be aware of the value of each mark to ensure you get an accurate read.
10.17 mg = ? g
0.01017 g