CLASS 9TH DAY 2
INTRODUCTION
DIRECTIONS
Imagine you are walking on the road and an elderly man asks you the direction to a nearby park. So how will you guide him to the park? Watch this video to learn more.👇 👇Â
Here is a small quiz to test your understanding. Try to attempt all the questions and get the highest marks possible.👇 👇Â
Nitrogen Cycle
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.
 The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.Â
The majority of Earth’s atmosphere (78%) is atmospheric nitrogen, making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.
To learn more about the concept of Nitrogen Cycle please Watch this video.
Carbon Cycle
Carbon is the backbone of life on Earth. We are made of carbon, we eat carbon, and our civilizations—our economies, our homes, our means of transport—are built on carbon.
Carbon is the fourth most abundant element in the Universe. Most of Earth’s carbon—about 65,500 billion metric tons—is stored in rocks. The rest is in the ocean, atmosphere, plants, soil, and fossil fuels.
Carbon flows between each reservoir in an exchange called the carbon cycle, which has slow and fast components. Any change in the cycle that shifts carbon out of one reservoir puts more carbon in the other reservoirs. Changes that put carbon gases into the atmosphere result in warmer temperatures on Earth.
To learn more about the concept Watch this video on Carbon Cycle
After watching the videos, write the steps involved in both the cycles and also explain them with the help of diagrams.
FUN ACTIVITY: Sudoku
If you don’t know how to solve this out…Go through the video explaining sudoku and how to solve it.👇 👇Â