Questions On Scientific Investigation

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Identifying variables

❖ In a scientific investigation there are 3 kinds of variables…

• Manipulated variable = Is the Independent Variable.

• Responding variable = Is the Dependent variable.

• Controlled variables = Things that stay constant; like temp, sunlight, amount of water. • Controlled Group =Does NOT have an Independent variable.

………………………………………………………………………………………………………

DIRECTIONS: For each experiment below, specify the manipulated, responding and controlled variables.

1. Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators.

Manipulated variable: _____________________________________________________
Responding variable: ______________________________________________________
Controlled variables: ______________________________________________________
________________________________________________________________________

2. Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured.

Manipulated variable: _____________________________________________________
Responding variable: ______________________________________________________
Controlled variables: ______________________________________________________
________________________________________________________________________

3. A study was done to find if different tire treads affect the braking distance of a car.

Manipulated variable: _____________________________________________________
Responding variable: ______________________________________________________
Controlled variables: ______________________________________________________
________________________________________________________________________

4. An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee.

Manipulated variable: _____________________________________________________
Responding variable: ______________________________________________________
Controlled variables: ______________________________________________________
________________________________________________________________________

5. A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.

Manipulated variable: _____________________________________________________
Responding variable: ______________________________________________________
Controlled variables: ______________________________________________________
________________________________________________________________________

6. Now it’s your turn… explain an experiment of your choice and identify the variables and controls.

Details of experiment: _____________________________________________________
________________________________________________________________________________________________________________________________________________
Manipulated variable: _____________________________________________________

Responding variable: ______________________________________________________

Controlled variables: ______________________________________________________
________________________________________________________________________

Name_____________________________

What is Density??

|Substance |Density (g/cm³) |
|Gold |19.3 |
|Mercury |13.5 |
|Lead |11.4 |
|Iron |7.87 |
|Aluminum |3.7 |
|Bone |1.7-2.0 |
Show More

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