Every thing is made up of elements (metals, non metals and metalloids) and their compounds
The chemical elements are the basic building blocks of matter. Here are some of the most concise elements:
1. Hydrogen (H)
2. Helium (He)
3. Carbon (C)
4. Oxygen (O)
5. Nitrogen (N)
6. Silicon (Si)
7. Iron (Fe)
These elements make up a significant portion of the matter in the universe and are essential for the formation of stars, planets, and life as we know it.
The composition of the universe is often described in terms of its matter and energy content. According to current understanding the universe is primarily composed of:
1. Dark Matter: This is an invisible and mysterious substance that does not emit, absorb, or reflect light. It makes up a significant portion of the universe's mass, and its exact nature is still not fully understood.
2. Dark Energy: Dark energy is another mysterious component that appears to be responsible for the accelerated expansion of the universe. It is thought to make up about 68% of the universe's total energy density.
3. Ordinary Matter: This includes the visible matter that makes up galaxies, stars, planets, and everything we can see and interact with. It accounts for only a small fraction of the universe's total energy and matter content, estimated to be around 5%.
Understanding the universe's composition is an ongoing area of research, and new discoveries may have been made since my last update.
The term "world" can refer to several different concepts, so I'll provide a general overview:
1. Planet Earth: "World" often refers to our planet, Earth. It's the third planet from the sun and the only known celestial body to support life. Earth is home to diverse ecosystems, climates, and a wide range of living organisms, including humans.
2. Global Society: "The world" can also refer to the global community or society. It encompasses the entirety of human civilization, including different countries, cultures, and societies, interconnected through various means such as trade, technology, and communication.
