The document contains 4 sections of an Earth Science bell ringer activity. Section 1 asks which is the largest body of water on Earth and the percentage of the world's population living in the United States. Section 2 describes an experiment by SpongeBob and Patrick testing jellyfish bait and asks about the question, dependent variable, hypothesis, and independent variable. Section 3 instructs students to define independent variable, dependent variable, and control variables from their textbook. Section 4 asks what variables can be found in the purpose and hypothesis of an experiment and why control variables are important.

1. Earth Science Bell Ringer 1
 Answer using a complete sentence:
 Which is the largest body of water on Earth?
 A. Pacific Ocean
 B. Atlantic Ocean
 What percent of the world’s population live
in the United States?
 A. 6%
 B. 12%
 C. 18%
 D. 24%

2. Earth Science Bell Ringer 2
 SpongeBob and Patrick love to go jellyfishing. They
wondered if a new brand of jellyfish bait would help
them catch more jellyfish. To test their idea, they
bought a big container of bait for their next 3 trips to
their top-secret fishing spot. SpongeBob fished
without any bait, while Patrick used the new bait.
Both of them kept track of how many jellyfish they
caught in 30 minutes.
 What is the question/problem and the dependent
variable?
 What is the Hypothesis and the independent Variable?
Remember to respond in complete sentences and date your
response!

3. Earth Science Bell ringer 3
 Obtaina text book from the cart. Using
pages 730 and 731 find and write the
explanations for the following terms.
1. Independent/Manipulated variable
2. Dependent/Responding variable
3. Control variables

4. Earth Science Bell ringer 3
Responses:
1. The factor that scientists purposely
change is called Independent or
Manipulated variable.
2. The factor that may change because of
the manipulated variable and scientists
want to observe is called the
Dependent or Responding variable.
3. The factors that scientists purposely keep
the same are called Control variables.

5. Earth Science Bell ringer 4
Remember to answer in complete sentences!
 Whatvariables can be found in the Purpose
or Question of an experiment and the
Hypothesis?
 Why are Control Variables important in an
experiment?

6. Earth Science Bell ringer 4
Responses
 Theindependent and dependent variables
can be found in the question and
hypothesis of an experiment
 Control variables are important because
they make an experiment “fair”.