Independent and Dependent part 2

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the dependent variable?

• Using the same type of plant

• Each plant was placed in a 10 inch pot

• The growth of the plant

• One plant is in the sunlight and the other is under a box

Tags

NGSS.MS-LS1-5

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the independent variable?

• Using the same type of plant

• Each plant was placed in a 10 inch pot

• The growth of the plant

• One plant is in the sunlight and the other is under a box

Tags

NGSS.MS-LS1-5

Khaleel is testing how the use of stress balls during testing affects a student's test score.  The students' average test scores who used the stress balls is the __ variable.

• dependent (measured)
• constant (same)
• independent (changes)

Tags

CCSS.6.EE.C.9

Mario studied how far room temperature water would spurt out of a platic milk carton when 3mm holes were punched at different heights from the bottom of the container. Identify the dependent variable

• 3 mm holes
• distance water traveled out of carton
• different heights of holes in container
• ice water from Iceland

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

• amount of water
• temperature of water
• height of ice cube
• temperature the ice cube was at its' highest height

Zack is testing whether temperature affects the distance a rubber band can be stretched before it breaks. He heats three rubber bands in a microwave oven. He puts

three in a jar on the kitchen counter. He puts three in the refrigerator and three in the freezer.

Which is the control group?

• rubber bands in the jar

• rubber bands in the freezer

• rubber bands in the refrigerator

• rubber bands in the microwave

Asmee is doing an t investigation using four of her brother’s baby teeth that are about the same size. She put one tooth in a cup of cola, one in a cup of apple juice, one in a

cup of orange juice, and one in a cup of distilled water. In a month, she will see what has happened to each of the teeth.

What is the control in this experiment?

• cola and tooth

• apple juice and tooth

• orange juice and tooth

• distilled water and tooth

Gerald wants to find out how quickly he can melt a stick of butter. He plans to use a hair dryer with 4 different heat settings. What would be the control group in his experiment?

• Hottest Setting
• Lowest Setting
• No Heat
• Middle Setting

Which is true of a control group?

• It receives what would normally happen in real life
• It is the only thing that changes
• It is what is measured in an experiment
• It is the variables that stay the same in an investigation

If you were testing how well different dish soaps cleaned grease, the independent variable would be the:

• dish type
• amount of grease
• dish soap type
• grease type