Control vs. Experimental Groups

A company wants to sell more sports drinks so they decide to add more sugar.  For Group A they give them gatorade with an added teaspoon of sugar. For Group B they give them regular gatorade (without adding extra sugar). Which Group is the CONTROL GROUP?

• Group A
• Group B
• The Gatorade
• The Company

In the experiment shown, 25 plants (Group A) received 50 mL of coke each day, 25 plants (Group B) received 50 mL of juice, and 25 plants (Group C) received 50 mL of water.  Every day for one week, plant growth was measured.  Which group is the control group?

• Plant A
• Plant B
• Plant C
• There was no control group

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the control group?

• amount of time the spray stays on the shower
• the half of the shower sprayed with water
• the half of the shower sprayed with coconut juice
• the amount of slime

What is the experimental group?

• drink type
• # of paper stacks
• Group B
• Group A

A restaurant owner wants to know which cleaner is the best. He chose 21 tables. He cleaned 7 tables with his regular cleaner. He cleaned 7 other tables with Ecocleaner. He cleaned the last 7 tables with Shiny Fab Cleaner and made observations. What are the experimental groups?

• the group of tables cleaned with Ecocleaner

• tap water

• the Group cleaned with the regular cleaner

• The groups of tables cleaned with Shiny Fab cleaner

Tags

NGSS.MS-ETS1-3

An experiment is being done to determine how light affects the growth of flowers. 10 flowers are given the regular amount of (sun)light, 10 flowers are grown in a shaded area, and 10 are grown in an area where they received extra sunlight. What is the control group in this experiment?

• the 10 flowers that received extra sunlight

• the 10 flowers grown in a shaded area

• the 10 flowers grown in the regular 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 control group?

• plants grown with the more than the normal amount of water

• plants receiving the normal amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A food scientist and coffee shop owner hypothesizes that the temperature at which milk is heated for hot chocolate affects the (perceived) sweetness of the taste. He makes 50 cups of hot chocolate from milk heated to the regular temperature. He makes 50 cups of hot chocolate with milk heated at a higher temperature. He asks 20 people to test them. What is the experimental group?

• the 50 cups of hot chocolate made with milk heated to the regular temperature

• the 50 cups of hot chocolate made with milk heated to the higher temperature

• the type of milk used

• the temperature of the milk

Steve wanted to see if different types of fertilizer influence the growth of pepper plants. He grew 50 plants with a new eco-friendly fertilizer and 50 plants with regular fertilizer. What is the experimental group?

• the 50 sunflowers grown with the regular fertilizer

• the 50 sunflowers grown with the eco-friendly fertilizer

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Students used various temperatures of water to see which one dissolved candy faster.  What are the experimental groups?

• the 20 pieces of candy dissolved in hot water

• the 20 pieces of candy dissolved in room temperature water

• the 20 pieces of candy dissolved in ice water

• the time it takes for Candy to Dissolve

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-4