# Day 1 A3 A4 A6 B4 B6

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If you are in A3 A4 A6 B4 B6, this is your homework!

• 1.

### 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. What is her IV?

• A.

Growth of pumpking

• B.

Amount of fertilizer

• C.

Separate plots

• D.

Type of seed planted

B. Amount of fertilizer
Explanation
The independent variable (IV) in this experiment is the amount of fertilizer. Amy wants to determine if the amount of fertilizer she gives her pumpkins will affect their growth. She puts a different amount of fertilizer in each plot, ranging from no fertilizer to varying amounts. By manipulating the amount of fertilizer, Amy is able to test the effect it has on the growth of the pumpkins. Therefore, the amount of fertilizer is the independent variable in this experiment.

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• 2.

### 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. What is her DV?

• A.

Growth of pumpking

• B.

Amount of fertilizer

• C.

Separate plots

• D.

Type of seed planted

A. Growth of pumpking
Explanation
The dependent variable (DV) in this experiment is the growth of the pumpkins. Amy wants to determine if the amount of fertilizer affects the growth of the pumpkins. Therefore, the growth of the pumpkins is what she is measuring and observing to see if it is influenced by the amount of fertilizer given.

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• 3.

### 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?

• A.

She adds the same amount of fertilizer

• B.

All seeds are "pumpkin" seeds

• C.

Each plot has same dimensions

• D.

B & C

D. B & C
Explanation
Amy has two control variables in place. First, she adds the same amount of fertilizer to each plot except for the first one where no fertilizer is added. This allows her to compare the growth of the pumpkins in each plot based on the different amounts of fertilizer. Second, each plot has the same dimensions of 10 ft by 10 ft. This ensures that any differences in pumpkin growth can be attributed to the varying amounts of fertilizer rather than differences in the size of the plots.

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• 4.

### 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?

• A.

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

• B.

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

• C.

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

• D.

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

C. If you increase the amount of fertilizer, then you will increase the size of pumpkins.
Explanation
Amy performed this experiment to test the hypothesis that increasing the amount of fertilizer will result in an increase in the size of pumpkins. She set up six plots with different amounts of fertilizer and planted one pumpkin seed in each plot to observe the effect of fertilizer on pumpkin growth. This hypothesis suggests that there is a positive correlation between fertilizer amount and pumpkin size, which Amy wanted to investigate through her experiment.

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• 5.

### 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.  What is his IV?

• A.

25 mL of water

• B.

1 ounce sugar cube

• C.

Temperature of water

• D.

Time for sugar to dissolve

C. Temperature of water
Explanation
The independent variable (IV) in this experiment is the temperature of the water. This is because Matt wants to determine if the temperature of the water affects how long it will take for the sugar to dissolve. By changing the temperature of the water, Scott is able to test Matt's hypothesis that warmer water will cause the sugar to dissolve faster. Therefore, the temperature of the water is the independent variable in this experiment.

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• 6.

### 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.  What is his DV?

• A.

Time for sugar to dissolve

• B.

Temperature of water

• C.

1 ounce sugar cube

• D.

25 mL of water

A. Time for sugar to dissolve
Explanation
The dependent variable (DV) in this experiment is the time it takes for the sugar to dissolve. This is what Matt is trying to determine and measure in order to test his hypothesis that warmer water will cause the sugar to dissolve faster. The temperature of the water, the amount of sugar used, and the volume of water are all independent variables that are controlled and manipulated by Scott in order to observe their effects on the dependent variable.

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• 7.

### 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 is a variable that must be controlled for?

• A.

25 mL of water

• B.

1 ounce sugar cube

• C.

Temperature of water

• D.

Time for sugar to dissolve

• E.

A and B

• F.

A, B, and C

E. A and B
Explanation
The variables that must be controlled for in this experiment are the volume of water used (25 mL) and the size of the sugar cube (1 ounce). These variables need to be kept constant in order to ensure that any observed differences in the time for sugar to dissolve are solely due to the temperature of the water. By using the same amount of water and the same size of sugar cube for each trial, any differences in the time for sugar to dissolve can be attributed to the temperature of the water.

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• 8.

### 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?

• A.

Scott and Matt can use more sugar for each trial

• B.

Scott and Matt can use both salt water and tap water

• C.

Scott and Matt can perform a second trial

• D.

Scott and Matt can gather more data at room temperature

C. Scott and Matt can perform a second trial
Explanation
Performing a second trial would make this a stronger experiment because it would allow for more data points and increase the reliability of the results. By repeating the experiment, Scott and Matt can ensure that their findings are consistent and not just a result of chance or error. This would also allow them to identify any outliers or anomalies in the data and make more accurate conclusions about the relationship between water temperature and sugar dissolution.

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• Current Version
• Mar 20, 2023
Quiz Edited by
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• Aug 22, 2013
Quiz Created by
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