Question

controlled experiments

• a controlled experiment keeps all variables the ____ except for the variable being ____
• independent variable (the ____): the variable ____
• dependent variable (the ____): the variable that is ____
• control group: group exposed to the ____ the experimental group ____
• constant: ______

Explanation:

To fill in the blanks about controlled experiments:

1. A controlled experiment keeps all variables the same except for the variable being tested. This is to isolate the effect of the independent variable.
2. Independent variable (the cause): the variable changed by the scientist to observe its impact.
3. Dependent variable (the effect): the variable that is observed and changes in response to the independent variable. It depends on the independent variable.
4. Control group: group exposed to the same conditions as the experimental group except for the independent variable. It provides a baseline for comparison.
5. Constant: a variable that stays the same throughout the experiment to ensure a fair test (e.g., temperature, time, amount of a substance).

Answer:

• A controlled experiment keeps all variables the \(\boldsymbol{\text{same}}\) except for the variable being \(\boldsymbol{\text{tested}}\).
• Independent variable (the \(\boldsymbol{\text{cause}}\)): the variable \(\boldsymbol{\text{changed by the scientist}}\).
• Dependent variable (the \(\boldsymbol{\text{effect}}\)): the variable that is \(\boldsymbol{\text{observed and changes in response to the independent variable}}\).
• Control group: group exposed to the \(\boldsymbol{\text{same conditions as}}\) the experimental group \(\boldsymbol{\text{except for the independent variable}}\).
• Constant: \(\boldsymbol{\text{a variable that stays the same throughout the experiment}}\)