N.1.4 Control group and variable

Does warm salt water or cold salt water dissolve salt faster? What would be the variable in this experiment?

• Water

• temperature of water

• type of salt

• speed of stirring

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Does salt dissolve faster when stirred fast or slow? What would be the variable in this experiment?

• Water

• temperature of water

• type of salt

• speed of stirring

Mr. McNiece 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

Mr. McNiece 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 (something that is kept the same) 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

Nick wanted to see how high an ice cube would float in different temperatures of water. Identify the variable.

• amount of water

• height of ice cube

• temperature of water

• size of ice cube

Mr. McNiece 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 variable.

• pulse rate

• types of music

• classical music resulted in the highest pulse rate

• Mr. McNiece

Jessie is concerned about how tired his classmates seem. He created a drink that he thinks will boost their energy. He recruits 100 classmates with a history of tiredness. He has 50 of them drink his new special energy drink. The other 50 drink a beverage that looks like the special energy drink, but is just water and food coloring. Both groups were told that they were getting the special drink that would boost energy. After 2 hours, 30 classmates in the first group reported having more energy and 8 classmates in the second group reported having more energy.

What is the variable?

• Amount of energy

• Type of Drink

• The food coloring

• There isn't one

What would the variable be in an experiment testing which types of paper airplane goes furthest?

• the paper used

• the type of paper airplane

• the distance of each plane's flight

• how hard the plane is thrown

Tags

NGSS.MS-PS2-2

A custodian notices some dirty tables and wants to know what's the best cleaner. He uses a new spray cleaner to remove the green slime left by students on half of his tables and water on half of his tables. Identify the variable.

• type of cleaner

• the new cleaner

• the green slime

• the effect of the cleaner

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

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