Amy wants to determine if the amount of fertilizer she gives her pumpkins will affect their growth. Amy thinks that the plot with the most fertilizer will produce the biggest pumpkin. She makes six separate plots, each 10 ft by 10 ft. She puts a different amount of fertilizer in each one. In the first plot she puts no fertilizer. She plants one pumpkin seed in each plot. She adds different amounts of fertilizer. Which of the following is the BEST response: what control variable or control variables does Amy have in place?

She adds the same amount of fertilizer

Amy wants to determine if the amount of fertilizer she gives her pumpkins will affect their growth. Amy thinks that the plot with the most fertilizer will produce the biggest pumpkin. She makes six separate plots, each 10 ft by 10 ft. She puts a different amount of fertilizer in each one. In the first plot she puts no fertilizer. She plants one pumpkin seed in each plot. She adds different amounts of fertilizer. Which of the following hypotheses would have lead Amy to perform this experiment?

If you increase the amount of fertilizer, then you will increase the size of pumpkins.

If you increase the size of a plot, then you will increase the size of pumpkins.

If you increase the size of a plot, then you will decrease the size of pumpkins.

If you increase the amount of fertilizer, then you will decrease the size of pumpkins.

Matt wants to determine if the temperature of water effects how long it will take sugar to dissolve. Matt thinks that warmer water will cause the sugar to dissolve faster. Scott uses 25ml of water at each temperature and uses a 1 ounce sugar cube for each trial. Scott decides to use 5 different temperatures, 2 below room temperature, room temperature, and 2 above room temperature. He records the time from when he places the cube in the water to when he can no longer see any sugar crystals. Which of the following changes would make this a stronger experiment?

Scott and Matt can perform a second trial

Scott and Matt can use more sugar for each trial

Scott and Matt can use both salt water and tap water

Scott and Matt can gather more data at room temperature

Honors Physics Day 1

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Quizzes Created: 9 | Total Attempts: 3,956

Questions: 10 | Attempts: 88 | Updated: Nov 21, 2023

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