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Wab
Fair testing
Angela wanted to find out if radish seeds would sprout if she watered thern every day about as much as it
rains usually. " think the seeds will not germinate if I water them
too much." She thought to herself "I
wonder
what experiment I could do to find out the answer and
make sure it's a fair test?"
Angela bought a packet of radish seeds and then collected some containers and some garden soll from
her father's garden shed. She decided that she would test two different
amounts of water to see which
amount made the seeds germinate/sprout quicker.
Angela worked cut that she needed 500mL a day to
keep the soll moist in her containers. So, she decided
she would use 500mL in containers marked sample
A and 250mL in the containers
marked sample B.
omponent 4A
omponent 43



How should angela measure which seeds sprouted more quickly?

Sagot :

CloudyClothy

Preparing Seed Germination

Here are the questions from the image along with possible answers:

Component 4B

Q1. What should Angela use to measure the amount of water she intends to use each day?

Angela should use a measuring cup or a graduated cylinder to accurately measure the amount of water (500 mL and 250 mL) she uses each day.

Q2. How should Angela prepare the containers she will put the seeds in?

Angela should:

  • Clean the containers thoroughly to ensure no contaminants affect the experiment.
  • Fill the containers with an equal amount of garden soil.
  • Make sure the soil is well-mixed and evenly distributed.
  • Label the containers clearly as sample A and sample B.

Q3. Suggest a method that Angela should now use to put the seeds in the container and set up a schedule for watering.

Angela should:

  • Place the same number of radish seeds at equal depth in each container.
  • Water the containers daily with the specified amounts (500 mL for sample A and 250 mL for sample B).
  • Water the containers at the same time each day to maintain consistency.

Component 4C

Q1. How should Angela measure which seeds sprouted more quickly?

Angela should record the number of days it takes for the first seeds in each container to sprout. She can also count the number of sprouted seeds at regular intervals (e.g., daily) to compare the rate of germination.

Q2. Where should Angela place the containers that she will water each day?

Angela should place the containers in a location where they receive the same amount of sunlight and are exposed to similar environmental conditions (e.g., temperature, humidity). This ensures that differences in sprouting are due to the watering amounts and not other factors.

Q3. Why did Angela need to have three containers in each sample and why did they all have to be in the same position outside?

Angela needed three containers in each sample to replicate the experiment and ensure reliability. This reduces the impact of anomalies or outliers in the data. Placing all containers in the same position outside ensures they are subjected to the same environmental conditions, making the experiment fair and controlled.

Component 5: Lesson Conclusion

Q1. Has this lesson helped you to understand what fair testing means in science? How?

Yes, this lesson has helped me understand what fair testing means in science. Fair testing involves controlling variables to ensure that the experiment is conducted in a way that isolates the effect of the independent variable being tested. In Angela's experiment, she controlled variables like the type of seeds, the type of soil, and the location of the containers. The only variable she changed was the amount of water given to the seeds. This allows her to accurately determine the effect of different water amounts on seed germination.

Q2. Did you find Angela's experiment interesting? If so, why?

Yes, I found Angela's experiment interesting because it demonstrates a practical application of the scientific method to solve a real-world problem. The experiment is simple yet effective in illustrating the concept of fair testing and the importance of controlling variables. Additionally, it provides clear and measurable outcomes that can help understand the impact of watering on seed germination. [tex][/tex]

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