Science Experiment

What term is used for the group in an experiment that does not receive the experimental treatment and is used as a baseline for comparison?

• Independent variable

• Dependent variable

• Control group

• Controlled variable

Tags

NGSS.MS-PS2-5

In a science experiment, why is it important to clearly define and identify the variables?

• To make the experiment more complicated

• To confuse the participants

• To ensure that the experiment is not repeatable

• To communicate the purpose and design of the experiment and its results effectively

Tags

NGSS.MS-PS2-2

Scenario: A scientist is investigating how the length of a pendulum affects the time it takes for one full swing.

What is the dependent variable?

• Length of the pendulum

• Time for one full swing

• Mass of the pendulum bob

• initial angle

• air resistance

What is the independent variable?

• Type of paper

• Launching force

• Air resistance

• Paper airplane design

• Distance traveled by the paper airplane

What is the dependent variable?

• Type of paper

• Launching force

• Air resistance

• Paper airplane design

• Distance traveled by the paper airplane

Tags

NGSS.MS-PS2-2

Researchers are studying how varying incubator temperatures impact the hatch rate of chicken eggs.

What is the independent variable?

• Hatch rate of chicken eggs

• Type of chicken eggs

• Humidity

• Egg turning frequency

• Incubator temperature

Researchers are studying how varying incubator temperatures impact the hatch rate of chicken eggs. What is the dependent variable?

• Hatch rate of chicken eggs

• Type of chicken eggs

• Humidity

• Egg turning frequency

• Incubator temperature

A scientist is conducting an experiment to see how the weight of a car affects its fuel efficiency. What is the dependent variable in this experiment?

• The weight of the car

• The type of fuel used

• The fuel efficiency of the car

• The color of the car

A student designs an experiment to test the force of a spring using a spring launcher and four spheres with the same diameter but with different masses. What other piece of equipment would be most useful for this experiment?

• A graduated cylinder to measure the volume of each sphere before the sphere is launched

• A beaker to collect the spheres after they are launched

• A stopwatch to measure how long it takes to load each sphere on the spring

• A meter stick to measure the height each sphere reaches after the sphere is launched

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. What is a reasonable conclusion to this investigation?

• More mass will require more force to pull it.

• More mass will require less force to pull it.

• Smoother surfaces will decrease the amount of force needed.

• Rougher surfaces will decrease the amount of force needed.

Tags

NGSS.MS-PS2-2