|Image by Adina Voicu from Pixabay|
How the Rock Cycle works?
The Rock cycle is the change in the earth’s surface. It follows the following steps.
- Old rocks at the earth’s surface weather
- Sediments formation
- Buried and packed down the sediments
- Heated and reformed into new rock.
Soil is made up of weathering rocks and decomposing of dead organic matter such as plants, animals, and germs. If we drop a rock and it breaks apart, then we would see further than broken into small pieces. In nature, old rocks are both constantly breaking apart and being renewed under the earth’s surface. This entire process of breaking and renewing is called the rock cycle. This information is useful for science fair projects for 7th grade.
What is the layer of soil?
As we discussed earlier. Soil forms from the rock fragmentation. The layer of soil is one of the interesting phenomena in earth science. Each layer has a different chemical makeup and texture due to its composition.
If we dig a small hole in the ground, we can notice the top layer part of the soil is darker in color and looser texture. This type of soil is the top layer of the soil. It contains many of the minerals that are required for plant growth. Below to this topsoil layer, there are other layers of soil that are more compact like rocky texture.
Photo by Andrew Buchanan on Unsplash
How is the temperature on the layer of soil different from other layers?
Soil layer differs in their mineral composition. In this experiment, we will investigate the temperature difference in a different layer of soil. This temperature difference is related to the nature of the soil composition.
Material Required for a temperature difference of soil layers:
First, you need to get permission from your parent or guardian. Then you can use the land. The following materials are required for Science Fair Projects for 7th Grade.
- Digital Thermometer box ——- two
- Digging tool ——- One
The digital thermometer box is different from fever checking thermometer. It has a separate thermocouple detector to determine the temperature. You can monitor the temperature of appropriate distance places.
Standard Operating Protocol for earth’s temperature measurement:
- Dig the hole at least 30 cm deep in the ground and bury the thermometer’s outdoor sensor. you label it as an underground sensor and temperature outcome.
- You place another thermometer sensor in the surface soil. you label it as surface temperature outcome.
- You record the temperature in the computer (if you know to the program by using MATLAB, you can collect data automatically). otherwise, you can use a notebook to record the temperature.
Observation from earth’s temperature measurement:
Temperature data are collected for different duration of the day. Temperature is plotted on the Y-axis and time on the X-axis. you can polt the graph for surface and underground temperature data. From these graphs, you can compare the temperature difference between the surface and the underground layer of soil.
Temperature data collection can be extended for months to the entire year. If you collect the data for the entire year, it covers all four seasons. You can investigate the relation of soil temperature with respect to different seasons. Science Fair Projects for 7th Grade present as a poster with the results from this project.