Experimental Design

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group
• control group
• data
• variables

A custodian notices some dirty tables and wants to know which cleaner is the best to use. He tests three different cleaners and looks at how well they clean compared to tap water. What is the independent variable?

• type of cleaner

• tap water

An experiment is being done to determine how light affects the growth of small zinnia plants. One plant is placed in full sunlight, the second in a shaded area, the third in an unlit closet. What is the independent variable in the experiment?

• the amount of light

• plant in the closet

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Steve wanted to see if different types of fertilizer influence sunflower growth. What is the independent variable?

• type of fertilizer

• sunflower grown without fertilizer

Tags

NGSS.MS-LS1-5

A custodian notices some dirty tables and wants to know which cleaner is the best to use. He tests three different cleaners and looks at how well they clean compared to tap water. What is the control group?

• type of cleaner

• tap water

Tags

NGSS.MS-PS1-2

An experiment is being done to determine how light affects the growth of small zinnia plants. One plant is placed in full sunlight, the second in a shaded area, the third in an unlit closet. What is the control group in this experiment?

• the amount of light

• the plant in the closet

Tags

NGSS.MS-LS1-5

Maddie wanted to see if different types of fertilizer influence sunflower growth. What is the control group?

• type of fertilizer

• sunflower grown without fertilizer

• groups with different types of fertilizer

• amount of sun light

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Hypothesis: If plants are watered more than normal, then growth height will increase. What is the independent variable?

• the amount of water

• a plant receiving the normal amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Mrs. Barton wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. Identify the independent variable.

• classical music resulted in the highest pulse rate
• high pulse rate
• pulse rate
• types of music

Mrs. Barton wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. What constant should be considered when doing this experiment?

• types of music
• use all dead people
• using a different student for each music type
• amount of time the music was played

Tags

NGSS.MS-ETS1-1