# Developing & Conducting Investigations Study Cards

independent variable
The part of an experiment that is changed by the scientist
conclusion
The part of an experiment where you analyze the results
if, then, because
Three words that should appear in a hypothesis
Scientific Method
A procedure that is used by scientists to solve a problem
hypothesis
The part of an experiment where you predict results.
dependent variable
The part of an experiment that is measured by the scientist.
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A study was done to find if different tire treads affect the braking distance of a car. What is the independent variable?
A study was done to find if different tire treads affect the braking distance of a car. What is the dependent variable?
braking distance
The time it takes to run a mile depends of the person’s running speed. What is the independent variable?
person’s running speed
The time it takes to run a mile depends of the person’s running speed. What is the dependent variable?
time it takes to complete the mile
The height of bean plants depends on the amount of water they receive. What is the independent variable?
The height of bean plants depends on the amount of water they receive. What is the dependent variable?
height of the bean plants
What is one reason you would do background research?
1. safety
2. better predict results
3. connect it to the real world
The distance a paper airplane travels depends on the length of the airplane. What is the independent variable?
length of the paper airplane
The distance a paper airplane travels depends on the length of the airplane. What is the dependent variable?
the distance the plane travels
Does the number of times you dip a wand into bubbles affect the number of bubbles made? What is the independent variable?
number of times the wand is dipped into the bubbles
Does the number of times you dip a wand into bubbles affect the number of bubbles made? What is the dependent variable?
What procedure is used by scientists that helps them solve a problem or answer a question?
scientific method
What is the term that means an educated guess or prediction?
hypothesis
What variable is used to collect data from?
dependent variable
What variable does the scientist change to perform the experiment?
independent variable
What is the part of the scientific method that discusses results and tells whether the hypothesis was correct or incorrect?
conclusion
What three words should be in your hypothesis?
if, then, because
Identify the independent variable in the question: How does the temperature of clay affect how easy it is to mold into a shape?
temperature of the clay
Identify the dependent variable in the question: How does the temperature of clay affect how easy it is to mold into a shape?
easiness to mold the clay
What measurement tool is used to measure the mass of an object?
triple beam balance
What measurement tool is used to take the temperature of a substance?
thermometer
What measurement tool is used to measure length?
ruler, meter stick
What measurement tool is used to measure the volume or capacity of a liquid?
Which kind of data is collected using numbers?
quantitative
Which kind of data is collected using your senses?
qualitative
black, bright screen
Make 2 quantitative observations about your laptop (you can make them up, but use the correct words and make them realistic!)
.8 kg, 44 cm long
Write a possible hypothesis for the question: Which type of soda will people most like in a taste test?
If different soda brands are tested, then people will prefer Coke, because it is more popular.
What measurement tool? mL
N or L? The marble had a mass of 4 g.
Quantitative (N)
N or L? The ice is cold.
Qualitative (L)
N or L? The coke can has 255 mL of soda.
Quantitative (N)
What is qualitative data?
Data collected using observations from the 5 senses.
What measurement tool? degrees Celsius
thermometer
N or L? The temperature is 30 degrees C.
Quantitative (N)
N or L? The movie was long.
Qualitative (L)
N or L? The football game lasted 60 minutes.
Quantitative (N)
N or L? The wall is green.
Qualitative (L)
N or L? The dog was growling.
Qualitative (L)
N or L? The concert was loud.
Qualitative (L)
What measurement tool? m
meter stick
What measurement tool? g
triple beam balance
Write a hypothesis: Which brand of batteries lasts the longest?
If brands of batteries are tested, then Energizer will last the longest, because the Energizer bunny ads are funny. (Answers may vary)
What is quantitative data?
Data collected using numbers
N or L? The man is 2 m tall.
Quantitative (N)
Write a hypothesis: Which brand of soda will people prefer, Sprite or Sierra Mist?
If people are choosing their favorite soda, then they will choose Sierra Mist, because the commercials say it has a refreshing taste. (Answers may vary)
What measurement tool? mass
triple beam balance, scale
What measurement tool? length
meter stick, ruler
Write a hypothesis: Which color of light do plants germinate the most in: White, Green, Red, Dark
If seeds are germinated in the dark, then they will germinate more, because seeds germinate under the soil where it is dark. (Answers may vary)
What measurement tool? temperature
thermometer
What measurement tool? capacity (volume of a liquid)
triple beam balance
Write a hypothesis: How does listening to music while studying affect a students performance on a test?
If students listen to music, then they will perform better, because the students will study longer if they listen to music they enjoy. (Answers may vary)