Experimental design

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. what is the control group?

• Same air temperature

• type of fertilizer

• the plant with no fertilizer

• weight of the tomatoes produced

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. what is the independent variable/

• type of fertilizer

• same type of soil

• weight of tomatoes grown

• same amount of soil

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. what are the constants?

• Fertilizer A

• same amount of sunlight

• same type of soil

• same air temperature

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. what would be a good title?

• The effect of fertilizer on tomato growth

• the effect of tomato growth on fertilizer

• the effect of fertilizer a on fertilizer b

• the effect of Larry on tomato growth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. what is a good hypothesis?

• The effect of fertilizer on tomato growth

• If you use fertilizer on tomato plants then the plants will produce more tomatoes by weight because of the nutrients found in the fertilizer.

• If you don't use fertilizer the plants won't grow

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. What is the dependent variable?

• the type of fertilizer

• the plant with no fertilizer

• the weight of tomatoes produced

• same amount of soil

Tags

NGSS.MS-LS1-5

Blanche wants to try out different types of cleaners to clean the school floors. She experiments using cleaner A, cleaner B, cleaner C, and then just water. She puts cleaner a on 4 tiles, cleaner b on 4 tiles, cleaner c on 4 tiles, and then she cleans the last 4 tiles with just water. She uses the same amount of cleaner, the same type of times, the same amount of grime on the times, same air temperature, and leaves it on for the same amount of time. at the end, she identifies which one has the least amount of remaining grime to identify which cleaner worked best. What would be a good title?

• Cleaners

• Clean tiles

• The effect of different cleaners on floor tiles

• If you use floor cleaner on floor tiles, it will remove grima because of the properties of the cleaners.

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Blanche wants to try out different types of cleaners to clean the school floors. She experiments using cleaner A, cleaner B, cleaner C, and then just water. She puts cleaner a on 4 tiles, cleaner b on 4 tiles, cleaner c on 4 tiles, and then she cleans the last 4 tiles with just water. She uses the same amount of cleaner, the same type of times, the same amount of grime on the times, same air temperature, and leaves it on for the same amount of time. at the end, she identifies which one has the least amount of remaining grime to identify which cleaner worked best. What are some constants?

• amount of grime left after cleaning

• same amount of cleaner

• same amount of grime to start

• same amount of time

Tags

NGSS.MS-ETS1-3

Blanche wants to try out different types of cleaners to clean the school floors. She experiments using cleaner A, cleaner B, cleaner C, and then just water. She puts cleaner a on 4 tiles, cleaner b on 4 tiles, cleaner c on 4 tiles, and then she cleans the last 4 tiles with just water. She uses the same amount of cleaner, the same type of times, the same amount of grime on the times, same air temperature, and leaves it on for the same amount of time. at the end, she identifies which one has the least amount of remaining grime to identify which cleaner worked best. What is the independent variable?

• types of cleaner

• the tiles washed with only water

• same amount of cleaner

Tags

NGSS.MS-ETS1-3

Blanche wants to try out different types of cleaners to clean the school floors. She experiments using cleaner A, cleaner B, cleaner C, and then just water. She puts cleaner a on 4 tiles, cleaner b on 4 tiles, cleaner c on 4 tiles, and then she cleans the last 4 tiles with just water. She uses the same amount of cleaner, the same type of times, the same amount of grime on the times, same air temperature, and leaves it on for the same amount of time. at the end, she identifies which one has the least amount of remaining grime to identify which cleaner worked best. What is a good hypothesis?

• If you use cleaner on tile floor, then it will remove more grime because of the properties of the cleaners.

• The effect of cleaners on floor tile

• clean tiles

Tags

NGSS.MS-PS1-2