Explore |
In the plant kingdom, there are many different kinds of plants, they are like gifts of nature, waiting for us to explore. For example, dicot and monocot plants, there are many kinds of them, and they are very beautiful. We understand that plants need air, soil, temperature, moisture and nutrients to grow. Next, we will experiment with how the seeds will change under the influence of microwaves. |
Research Question |
Do microwaves affect germination? |
Predictions |
The growth rate of seeds will change under the influence of microwaves for different periods of time. |
Experimental Design |
Our plan is to prepare a microwave oven, and some pearl millet seeds, by heating them in the microwave for 15 seconds, 30 seconds, 45 seconds, 1 minute, 2 minutes, and 4 minutes. Note: When heating seeds in a microwave oven, you need to put a cup of water in it, and replace a cup of water for each heating group. When the seeds are heated, place them on a moist paper towel, and replace the paper towels in each group. Then try to sow, label each group, and use moist paper towels to keep the seeds in moisture so that the seeds can germinate. In addition, prepare a group of seeds without heating, and compare them with other heated seeds. Then observe and record the effect of microwave on the growth of seeds at different times. |
Conclusion |
After two weeks of observation and recording, we came to the following conclusion: Microwave oven will affect the growth rate of seeds. Compared with the non-heated example, the first germination is the example of heating in the microwave for 30 seconds, and the second is the example of 20 seconds. And the example of 45 seconds to 2 minutes did not germinate. Observe and record one week later, it is found that the unheated example grows fastest,
1. Explains that what microwave heating affects is the germination rate and germination speed of seeds. Observation after 2 weeks found that the 45-second and two-minute examples germinated, but only one seed germinated in both examples.
2. This shows that too much heat will damage the internal structure of the seed, which prevents it from germinating.
3. Appropriate heating of seeds can speed up the germination time of seeds. |
Investigation Theme |
WOS |
Grade Level |
High School Students (Grades 9,10,11,12) |
Teacher Name |
Hemamali Perera |
School Name |
Sierra Vista High School |
Session |
Fall 2021 |