Exploring Experimental Design with Various Surfaces

What is the main focus of a simple experimental investigation?

• Changing multiple variables

• Changing one variable and keeping others constant

• Using different tools for measurement

• Observing multiple outcomes

In the described investigation, what was used to measure the force?

• A stopwatch

• A spring scale

• A thermometer

• A ruler

What was the independent variable in the sled investigation?

• The mass of the sled

• The method of pulling the sled

• The type of surface

• The spring scale

What is the term used for the variable that is changed in an experiment?

• Constant variable

• Independent variable

• Control variable

• Dependent variable

What tool was used to measure the force in the sled investigation?

• A digital scale

• A spring scale

• A balance scale

• A force meter

What was kept constant during the sled investigation?

• The amount of force

• The type of surface

• The speed of pulling the sled

• The sled, mass, and spring scale

How was the sled pulled across each surface?

• Using different tools

• In different ways each time

• With varying speeds

• In the same basic way

Why is it important to keep other variables constant in an experiment?

• To save time

• To make the experiment easier

• To use fewer resources

• To ensure the results are due to the independent variable

What question was the investigation designed to answer?

• How does the mass of the sled affect the force needed?

• How do different surfaces affect the force needed to drag the sled?

• How does the speed of pulling affect the force needed?

• How does the type of spring scale affect the measurement?