Safety First
If your lab partner’s clothes catch on fire, what is the first thing you should do?
Tell the Teacher!
Used to grind solid materials into a powder
Mortar and Pestle
Convert 23 cm to m.
0.23 m
What is the dependent variable?
This type of graph is used for showing percentages.
Circle/Pie Graph
What is the best safety equipment for helping a person who is on fire?
A fire blanket
Used to transfer liquids from large to small containers
Funnel
Convert 3,600,000 mm to km.
3.6 km
Factors that stay the same in an experiment so that the results are reliable are called…
Constants
The best type of graph for showing qualitative and quantitative measurements on one visual.
Bar Graph
What word is used to describe how to appropriately smell unknown substances in the lab?
Waft
Best glassware (sometimes plastic) to measure precise amounts of liquid
Graduated cylinder
Place 150,000,000 into scientific notation
1.5 x 108
A rule or principle that describes how something happens in nature is a…
A law
The best graph to show quantitative vs. quantitative data
Line graph
List 3 things you should wear to protect yourself from chemicals.
Safety goggles, lab apron, long pants, closed-toed shoes. (I will also accept hair tied back)
What two objects are used to heat substances in the lab?
Hot plates and Bunsen burners
Convert 75°F to °C
24°C
Explain the difference between precise measurements and accurate measurements.
Precise measurements are consistent/specific.
Accurate measurements are correct.
List 3 things every line graph must have.
Title, X-Axis label, Y-Axis label
What specific precaution is necessary for heating test tubes?
Tilt the mouth of the test tube away from you and your partners
The curve that forms in liquids in graduated cylinders.
Meniscus
Convert 71,000 mL to gallons.
18.8 gal
A team of scientists wants to test if watching commercials makes kids eat more snacks when watching TV. They gather two groups of elementary school students. The first group watches 2 hours of TV with no food commercials. The second group watches 2 hours of TV with food commercials every 15 minutes. After the scientists record how many goldfish the students ate during the time period.
List the independent variable, dependent variable, control group, and experimental group.
IV = whether or not kids watch food commercials
DV = amount of goldfish eaten
Control group = group without food commercials
Experimental group = group with food commercials
What axis does the dependent variable go on? What axis does the independent variable go on?
DV on Y-Axis
IV on X-Axis