Scientific Methods
What is the first step scientists take when they begin an investigation?
Ask a question.
Which variable is the one a scientist changes on purpose in an experiment?
Independent variable.
You want to know if different brands of paper make a paper airplane fly farther. You test Brand A and Brand B. Which is the independent variable?
Answer: Brand of paper.
If I expose my plants to sunlight then my plants will grow because plants need sunlight for survival.
In this the Dependent Variable is: Amount of Sunlight
True or False?
False
Define Scientific Method?
The process or steps taken to produce reliable results to answer a specific question.
Which step involves reading books or asking experts to learn what is already known about the question?
Research the topic.
What do we call variables that must stay the same so the test is fair (like same size of ball, same drop height)?
Answer: Control variables (constants).
If the ball is thrown over the roof then it will fall into the street and cause an accident because object cause accidents.
What is the independent variable?
Ball being thrown into the street
If scholars listen to trap music then they will act out more violently because trap music has violent lyrics
Dependent variable: Acting out violently True or False?
True (It is dependent Variable)
What does "variable" mean in a science experiment?
Answer: Variables are the things that can be change or Vary in Science Experiment to find the answers to questions.
Write the "If...then..." statement that scientists use to show an educated guess. What is that statement called?
Answer: Hypothesis.
Which variable is measured or observed as the result of the test?
Answer: Dependent variable.
If athletes drink gatorade then their performance will increase because gatorade supplies energy to the body.
What is the dependent variable
Increase athletic performance
If you are testing which brand of battery lasts longest, the brand of battery is the is Dependent Variable.
True or False?
False
Define "hypothesis."
Answer: An educated guess or prediction
Which step comes after conducting the experiment, when scientists look at their recorded measurements to decide if the hypothesis was supported?
Answer: Analyze data
In an experiment testing how the amount of water affects plant height, name the independent, dependent, and one control variable.
Independent = amount of water;
Dependent = plant height (growth);
Control = soil type (or same pot size, same sunlight).
If I put more soap in my bathtub then more bubbles will form because soap causes forms bubbles in the presence of water.
What is the dependent and independent variable?
Dependent Variable: Bubbles forming in water
Independent Variable: Amount of soap.
How tall the plant grows is a dependent Variable(in a "does the type of fertilizer affect how tall a plant grows" experiment)
True or False?
True
What is control Variables?
Variables that remain same through out the experiment to make sure the test is fair.
List the 7 steps scientist use as scientific methods to solve a problem.(in order)?
Ask a question → Research about Topic →Make hypothesis → Test hypothesis → Collect and record data → Analyze data →Draw Conclusion
In order to ensure a ____ test, there must be controlled variables.
fair
A scientist waters three plants with 50 mL, 100 mL, and 150 mL of water each day to measure their height. They use the same pot size, soil, and sunlight. Identify the independent, dependent, and one control variable.
Answer: Independent = amount of water; Dependent = plant growth (height); Control = pot size (or soil or sunlight).
In a "eating breakfast in the morning increases ability to learn in school" experiment-
Whether they ate breakfast before school or not is an Independent Variable. True or False?
True
(Independent Variable: Eating breakfast or not eating breakfast
Dependent Variable: Ability to learn in school)
Define Independent Variable?
Dependent Variable?
Independent Variable: This is the changing variable in an experiment.
Dependent Variable: This is the variable that you measure or observe in an experiment.