Scientific Design

Which experimental design decision would most likely produce invalid and unreliable results?

• having more than one controlled variable
• having only one control group
• having more than one independent variable
• having only one experimental group

Items in an experiment that you keep the same.

• control
• conclusion
• variable
• trade-off

An opinion based on the data.

• Pellagra
• conclusion
• variable
• control

What is a hypothesis?

• A hypothesis is the right answer to an experiment.
• A hypothesis is the wrong answer to an experiment.
• A hypothesis is an educated guess.
• I don't know.

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
• Control
• Compound

Research Question: Does the type of gasoline put in a car effect 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

Ms. S set up an experiment 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.

Tags

CCSS.6.EE.C.9

Ms. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.

• Distance traveled by the ball
• Height of the ramp
• Mass of the ball
• Who set up the experiment (Ms. S, etc)

Tags

NGSS.MS-PS2-2

The measurable factor in an experiment is known as the: 

• Control
• Independent Variable
• Constant
• Dependent Variable

Tags

NGSS.3-5-ETS1-3

How does the amount of baking powder added to a cake mix affect the taste?

Which is the independent variable?

• The amount of baking powder

• The type of cake

• The amount of oil in the cake

• The temperature of the oven