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Variables
Measuring Tools
Units
Graphs
Lab Safety
100
Give the definition of a dependent variable.
The dependent variables are your results of the experiment.
100
I need to measure how much liquid is in my water bottle. Which tool would I use to measure the liquid?
Graduated Cylinder
100
What are the units we use for length? Give at least 3 units.
cm, in, ft, mm, m, mi, kg
100
Explain what a line graph is.
A line graph is has data points on it that are connected with a line.
100
When glass breaks, what do you do?
Step away and tell Ms. Barrios immediately.
200
What does it mean when the dependent variable "responds" to the independent variable?
It means that the dependent variable relies on the independent variable, so your results will be a response to what the independent variable is.
200
You need to measure the mass of your cell phone. Which measuring tool would you use?
Triple Beam Balance
200
Your friend is trying to get the mass of his wallet. He tells you that the mass of his wallet is 89lbs. What is wrong with his measurement?
Mass is measured in grams (g).
200
I'm doing an experiment on favorite candies. I choose M&Ms, Skittles, Snickers, and KitKat. 5 people liked M&Ms, 8 people liked Skittles, 3 people liked Snickers, and 10 people liked KitKats. On which axis do the candies go on?
Since the candies are the independent variables, they will go on the x-axis.
200
When working with fire, what are two lab safety rules you have to follow?
- Never leave fire unattended - No pyros please - Use gloves or oven mitts - Dress properly
300
We have an experiment to test the effects of a certain fertilizer on plant growth, height growth, number of fruits it makes, and the average weight of the fruit produced. All of these are factors, come from the manipulation of a variable. In this experiment, what TYPE of variable are we manipulating and what is it?
We are manipulating the independent variable which is the type of fertilizer.
300
Your younger sibling has a fever! Which tool would you use to measure their temperature?
Thermometer
300
Think about the tools we've been using in class. Which unit would you see on the graduated cylinder?
We used milliliters (mL).
300
Explain what it means to "manipulate" the independent variable.
To manipulate the variable means that I change it to whatever I want it to be.
300
Sarah was trying to figure out what the mystery liquid was. She put on her lab coat, put her goggles on her forehead (she said she would put them on later), and put on gloves. She started as soon as she put her gloves on. What did she do wrong?
She didn't put her goggles on immediately and forgot to put them when she started her experiment.
400
FILL IN THE BLANKS: (__________ variable) causes a change in (__________ Variable) and it isn't possible that (__________ Variable) could cause a change in (__________ Variable).
INDEPENDENT variable causes a change in DEPENDENT Variable and it isn't possible that DEPENDENT Variable could cause a change in INDEPENDENT Variable.
400
When using a graduated cylinder, you use the meniscus to measure the volume of the liquid. What is the meniscus?
It is the curve of the liquid in the graduated cylinder. You look at the bottom of the meniscus (bottom of the curve) to get the measurement.
400
Think about the weather you see on TV during news reports. When the person announcing the weather comes on TV, which units do they use to describe how hot or cold it is outside?
They use *F or *C.
400
I'm doing an experiment on favorite candies. I choose M&Ms, Skittles, Snickers, and KitKat. 5 people liked M&Ms, 8 people liked Skittles, 3 people liked Snickers, and 10 people liked KitKats. When setting up your graph, what would the scale be for the dependent variable? (Count by 1's, 2's, 3's, or...)
We can set up the scale on the y-axis by 1's.
400
In the room, where is your sink, fire extinguisher, and first aid kit?
The sink is in the closet, the fire extinguisher is in the closet, and the first aid kid is in Ms. Barrios' desk.
500
Give an example of an experiment. Give the independent variable and dependent variable after you have explained your experiment.
Answers will vary. Ms. Barrios will determine what is correct.
500
When you measure your cell phone, you get 446.7 grams. Think back to the station with the balance beam and the ceramic bowl. The large weight measures the hundreds place, the medium weight measures the tens place, and the small weight measures the ones place. For each weight, which number would they have to be on to add up to 446.7g?
Large weight - 400g ; Medium weight - 40g ; Small weight - 6.7g
500
Think of a 2 liter (L) bottle of Pepsi. Convert 2 liters (L) to milliliters (mL).
2,000mL
500
Explain the difference between the following 3 graphs: bar graph, line graph, pie graph.
A bar graph is used to show patterns amongst categories that are not numbers; A line graph is used to show a pattern of numbers; a pie chart is used to show patterns of numbers that are part of a whole (fractions).
500
Act out a lab safety rule. Give an example of the rule being followed and the rule being broken.
Answers will vary. Ms. Barrios will determine if the performance is correct or not.