Hypothesis
An informed guess about casual relationships that are generated by observation and initial data collection
Scentific
... [Show More] Hypothesis
Prediction of what will occur in an experiment based on previous research
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Independent Variable
Manipulated variable; on x-axis
Dependent Variable
Measured based on changes (observed); on y-axis
Control Variables
Variables are kept the same
Conclusions
Based on evidence and subjected to scrutiny by other scientists
Peer Review
Process by which scientists submit their evidence to professional journals, where investigation and data are reviewed; only most reliable ones will pass
Based on previous research, a group of scientists believe that fruit flies are attracted to rotting fruit. They design an experiment to test this hypothesis. The scientists place 20 fruit flies in a chamber. On one side of the chamber, they place an unripe banana. On the other side of the chamber, they place a rotten banana. After 5 minutes, they count how many fruit flies are on each side of the chamber. Which of the following is the dependent variable in the experiment?
Number on each side of the chamber
Based on previous research, a group of scientists believe that fruit flies are attracted to rotting fruit. They design an experiment to test this hypothesis. The scientists place 20 fruit flies in a chamber. On one side of the chamber, they place an unripe banana. On the other side of the chamber, they place a rotten banana. After 5 minutes, they count how many fruit flies are on each side of the chamber. Which of the following is the hypothesis in the experiment?
If presented with an unripe banana, fruit flies will be attracted to it
Juan Carlos hypothesizes that changing color of light given to plants will affect their growth. He decides to test his prediction in an experiment. He sets up four groups of plants, giving each a different color of light. Each group has 10 radish plants all about 10 cm tall. He keeps all of them in the same temperature and gives them with the same amount of water each day. After 10 days, he records these results. Which of the following is the independent variable in this experiment?
Color of light
Juan Carlos hypothesizes that changing color of light given to plants will affect their growth. He decides to test his prediction in an experiment. He sets up four groups of plants, giving each a different color of light. Each group has 10 radish plants all about 10 cm tall. He keeps all of them in the same temperature and gives them with the same amount of water each day. After 10 days, he records these results. Which of the following should be controlled in this experiment?
Soil conditions [Show Less]