poinsettia data analysis worksheet
name:
date:
hour:
background information: yesenia’s family spends a small fortune replacing their old poinsettias every december. their old poinsettias never die—they just turn green and stay that color. last january, yesenia talked to a gardener and learned that poinsettias must have many hours of complete darkness every day in order to develop colorful bracts (modified leaves). the gardener had fifty red poinsettia plants he was unable to sell during the holidays, so he gifted all of them to yesenia. yesenia decided to have an experiment to determine the best method of changing the green poinsettias back to their vibrant red color. for her experiment, she divided the fifty plants into five groups of ten and varied the hours and quality of darkness of each group. information about the groups can be found in the table below. the results of her experiment are displayed in the bar graph.
| group a | 10 hours of darkness with a nightlight |
| group b | 10 hours of total darkness |
| group c | 14 hours of darkness with a nightlight |
| group d | 14 hours of total darkness |
| group e | typical growing conditions with no light alterations |

1. what was the total number of poinsettias that changed color?
2. which group of poinsettias had the results most similar to what yesenia wanted?
3. what percent of the plants with ten hours of total darkness changed color after eight weeks?
4. what percent of the poinsettias stayed green?
5. what affect do nightlights have on poinsettias? write your answer in complete sentences.
6. which do you think would have more poinsettias with color change: poinsettias with twelve hours of complete darkness or poinsettias with fourteen hours of darkness with occasional flickers of light? explain your answer in complete sentences.
7. yesenia’s friend arbor is a complete fashionista who changes her clothes, shoes, and accessories a minimum of six times a day. arbor had three green poinsettias she wanted to change back to red in preparation for the holidays. following yesenia’s advice, arbor placed the poinsettias in her dark closet for fourteen hours of each day. at the end of eight weeks, all of her poinsettias were still green. in complete sentences, explain why none of arbor’s poinsettias were red.
created and copyrighted by lily hansen in 2018 http://www.teacherspayteachers.com/store/lily-hansen

Question

poinsettia data analysis worksheet
name:
date:
hour:
background information: yesenia’s family spends a small fortune replacing their old poinsettias every december. their old poinsettias never die—they just turn green and stay that color. last january, yesenia talked to a gardener and learned that poinsettias must have many hours of complete darkness every day in order to develop colorful bracts (modified leaves). the gardener had fifty red poinsettia plants he was unable to sell during the holidays, so he gifted all of them to yesenia. yesenia decided to have an experiment to determine the best method of changing the green poinsettias back to their vibrant red color. for her experiment, she divided the fifty plants into five groups of ten and varied the hours and quality of darkness of each group. information about the groups can be found in the table below. the results of her experiment are displayed in the bar graph.
| group a | 10 hours of darkness with a nightlight |
| group b | 10 hours of total darkness |
| group c | 14 hours of darkness with a nightlight |
| group d | 14 hours of total darkness |
| group e | typical growing conditions with no light alterations |

1. what was the total number of poinsettias that changed color?
2. which group of poinsettias had the results most similar to what yesenia wanted?
3. what percent of the plants with ten hours of total darkness changed color after eight weeks?
4. what percent of the poinsettias stayed green?
5. what affect do nightlights have on poinsettias? write your answer in complete sentences.
6. which do you think would have more poinsettias with color change: poinsettias with twelve hours of complete darkness or poinsettias with fourteen hours of darkness with occasional flickers of light? explain your answer in complete sentences.
7. yesenia’s friend arbor is a complete fashionista who changes her clothes, shoes, and accessories a minimum of six times a day. arbor had three green poinsettias she wanted to change back to red in preparation for the holidays. following yesenia’s advice, arbor placed the poinsettias in her dark closet for fourteen hours of each day. at the end of eight weeks, all of her poinsettias were still green. in complete sentences, explain why none of arbor’s poinsettias were red.
created and copyrighted by lily hansen in 2018 http://www.teacherspayteachers.com/store/lily-hansen

Accepted Answer

### Sub - question 1:
# Explanation:
## Step 1: Identify the number of plants with color change in each group
From the bar graph (assuming the heights are: Group A: 1, Group B: 3, Group C: 4, Group D: 9, Group E: 0 (since it's typical growing conditions with no light alterations, so likely 0)).
## Step 2: Sum the number of plants with color change
Sum = 1+3 + 4+9+0=17.
# Answer: 17

### Sub - question 2:
# Brief Explanations:
Yesenia wanted to change green poinsettias back to vibrant red. Group D had the highest number of plants with color change (9 out of 10), so it is most similar to what she wanted.
# Answer: Group D

### Sub - question 3:
# Explanation:
## Step 1: Determine the number of plants in Group B (10 hours of total darkness) and the number with color change
Group B has 10 plants, and from the graph, 3 plants had color change.
## Step 2: Calculate the percentage
Percentage = $\frac{	ext{Number of plants with color change}}{	ext{Total number of plants in the group}}	imes100=\frac{3}{10}	imes100 = 30\%$
# Answer: 30%

### Sub - question 4:
# Explanation:
## Step 1: Calculate the total number of plants that stayed green
Total plants = 50. Total plants with color change = 17 (from sub - question 1). So plants that stayed green = 50 - 17 = 33.
## Step 2: Calculate the percentage
Percentage=$\frac{33}{50}	imes100 = 66\%$
# Answer: 66%

### Sub - question 5:
# Brief Explanations:
By comparing Group A (10 hours of darkness with a nightlight) and Group B (10 hours of total darkness), and Group C (14 hours of darkness with a nightlight) and Group D (14 hours of total darkness), we see that in groups with a nightlight (A and C), the number of plants with color change is less than in groups with total darkness (B and D). So nightlights seem to inhibit the color change of poinsettias as they reduce the number of plants that change color compared to total darkness conditions with the same number of hours of darkness.
# Answer: Nightlights inhibit the color change of poinsettias. When poinsettias are exposed to darkness with a nightlight (Groups A and C), fewer plants change color compared to when they are in total darkness (Groups B and D) for the same number of hours of darkness.

### Sub - question 6:
# Brief Explanations:
Poinsettias need complete darkness to develop colorful bracts. Poinsettias with twelve hours of complete darkness will likely have more color - changed plants than those with fourteen hours of darkness with occasional flickers of light. The flickers of light in the fourteen - hour darkness group will disrupt the complete darkness needed for color change, while the twelve - hour complete darkness provides the necessary dark conditions for color change without disruptions.
# Answer: Poinsettias with twelve hours of complete darkness would have more poinsettias with color change. This is because poinsettias need complete darkness to change color, and the occasional flickers of light in the fourteen - hour darkness group will disrupt the dark conditions required for color change, while twelve hours of complete darkness provides the necessary uninterrupted dark environment for color change.

### Sub - question 7:
# Brief Explanations:
Arbor placed the poinsettias in a dark closet for fourteen hours a day, but maybe the closet was not completely dark (since it's a closet, there could be small amounts of light leakage or the closet was not as dark as the conditions in Group D). Also, maybe the duration of eight weeks was not enough, or other factors like temperature, humidity in the closet were different from the experimental conditions. But mainly, the key factor is that poinsettias need complete darkness, and if the closet was not completely dark (even with 14 hours of darkness), it would prevent the color change.
# Answer: Arbor's poinsettias were still green because the closet may not have provided complete darkness. Poinsettias require many hours of complete darkness to change color, and if there was any light (even small amounts) in the closet, it would disrupt the dark conditions needed for the color change process. Also, other factors like the environment in the closet (temperature, humidity) might not have been suitable for the color change of poinsettias.

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QUESTION IMAGE

Question

Explanation:

Sub - question 1:

Step 1: Identify the number of plants with color change in each group

Step 2: Sum the number of plants with color change

Step 1: Determine the number of plants in Group B (10 hours of total darkness) and the number with color change

Step 2: Calculate the percentage

Answer:

Sub - question 2:

group a	10 hours of darkness with a nightlight
group b	10 hours of total darkness
group c	14 hours of darkness with a nightlight
group d	14 hours of total darkness
group e	typical growing conditions with no light alterations