Independent vs Dependent
What is the independent variable in an experiment?
It is the variable that you test or change.
What is the base unit for mass in the metric system?
The gram (g).
What tool is used to measure mass?
A balance
What is density?
The amount of mass in a given volume.
What is the dependent variable in the experiment testing how sugar affects student performance?
Student performance on the test.
In the study of how different tire treads affect braking distance, what is the dependent variable?
The braking distance of the car.
What prefix represents one-thousandth in the metric system?
Milli-.
How do you read a graduated cylinder?
Record all known digits and estimate one additional digit.
If a rock has a mass of 40 grams and a volume of 20 cm³, what is its density?
The density is 2 g/cm³
How many centimeters are in 1.5 meters?
150 centimeters
Give an example of a controlled variable in an experiment testing how temperature affects plant growth.
The amount of water the plants receive.
Convert 2500 milliliters to liters.
2.5 liters (L)
What is the estimated digit in the measurement 60.0 mL?
The last digit, which is 0.
How do you determine the volume using the displacement method?
By measuring the difference in water level before and after placing the object in the water.
What is the estimated digit in a graduated cylinder reading of 80.5 mL?
The last digit, which is 5.
What is the purpose of a control variable in an experiment?
To ensure that the results are due to the independent variable only.
Explain how you would convert 1.8 meters to centimeters using the metric system.
Move the decimal two places to the right, resulting in 180 cm
In a thermometer, what units can temperature be measured in?
Celsius (°C) or Kelvin (K)
Calculate the mass of 239 mL of a substance with a density of 1.2 g/mL
The mass is 286.8 grams
If the density of a substance is 3 g/cm³ and its volume is 10 cm³, what is its mass?
The mass is 30 grams.
How can you differentiate between independent and dependent variables in a given scenario?
The independent variable is what you change, while the dependent variable is what you measure.
What is the significance of the number 10 in the metric system?
The metric system is based on powers of ten.
For a graduated cylinder reading of 75 mL, what is the proper way to record this measurement?
You would write it as 75.0 mL, including the estimated digit.
What is the volume of a sample of sodium with a mass of 23.7 grams if its density is 0.97 g/cm³?
The volume is approximately 24.4 cm³.
What is the independent variable in an experiment measuring how light affects plant growth?
The amount of light the plants receive.