Investigating Experiments

The variable that can change in an experiment is known as __________________

• independent variable

• dependent variable

• the constant

• any of the variables can change

The variable that is being measured in an experiment or variable that DEPENDS on other variables is known as the __________________

• constant

• experimental variable

• independent variable

• dependent variable

The variables that do not change in an experiment are known as a ____________________?

(If something doesn't change it remains what?)

• constant

• dependent variable

• independent variable

• scientific theory

A standard to which your results can be compared is known as a ____________________

• variable

• constant

• control

• the dependent and independent variable

Joe noticed that when he washed dishes he sometimes made lots of froth and at other times made almost none. He designed an experiment where he put 1 drop of detergent in the sink and turned the tap on high until the sink was half full. He then repeated the experiment with 2 drops of detergent, then 3 then 4. Identify his dependent variable.

• the amount of bubbles

• the number of drops of detergent

• the brand of the detergent

• the temperature of the water

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The dependent variable is the _____.

• Diameter of the ball
• Force acting on the ball
• Height that the ball bounces
• Height from which the ball is dropped

Josie was performing an experiment where she grew the same kind of tomatoes in the same soil and amount of water.  She sat one in the sun and one in a closet for 14 days.  What is the independent variable in Josie's experiment?

• tomatoes
• soil
• sunlight
• water

In an experiment to find out how the temperature affects the bounce height of a ball, the dependent variable is ...

• temperature
• bounce height
• the thermometer
• the ruler

Research Question: Does the type of gasoline put in a car affect how fast the car can drive.

What is the independent variable?

• Type of gasoline

• which car the gas is put into

• how fast the car can drive

• how much gas is put into the car

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What should be kept constant? 

• type of plant, flower pot,  soil, and amount of sunlight
• water, apple juice, milk
• only the amount of sunlight
• type of plant only