Understanding Experimental Investigations

What is the main focus of a simple experimental investigation?

• Changing multiple variables

• Measuring multiple outcomes

• Changing one variable and measuring another

• Keeping all variables constant

In the described investigation, what was the independent variable?

• The method of pulling the sled

• The type of sled used

• The amount of mass on the sled

• The surface on which the sled was pulled

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

• A balance scale

• A spring scale

• A ruler

• A stopwatch

What was kept constant during the investigation?

• The amount of mass

• The force applied

• The sled, spring scale, and surface

• The speed of pulling

What was the investigation designed to determine?

• How the type of sled affects speed

• How mass affects the force needed to move objects

• How different surfaces affect movement

• How the method of pulling affects force