Experimental Design

Knowledge about the natural world based on facts learned through experiments and observation

• science
• hypothesis
• scientific method
• data

A statement about how things work in nature that seem to be true all the time.

• hypothesis
• scientific method
• scientific law
• scientific theory

An explanation of natural events that is supported by strong evidence.

• science
• scientific theory
• hypothesis
• scientific law

A possible explanation for an observation that can be tested by scientific investigations

• science law
• science
• scientific theory
• hypothesis

Used to develop a strategy to investigate a problem.

• scientific method
• scientific law
• data
• materials

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Controlled
• Constant

An experiment was set up to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?

• Distance traveled by the ball
• Height of the ramp
• Mass of the ball
• Where the experiment took place.

Which brand of bubblegum allows for you to blow the largest bubble?  This is an example of a:

• hypothesis
• problem
• theory
• conclusion

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. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables or constants?

• Amount of soil, sunlight and music
• type of liquid
• Plant growth
• plant given no liquid

Students planted bean seeds in the same kind of soil in separate cups. The cups were put next to each other on a sunny windowsill. Cup 1 was given 10mL of water every other day. Cup 2 was given no water. 
Identify the control group. 

• Cup 1
• Cup 2
• Type of soil
• Amount of sun