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What is the hardest natural substance on Earth?
Which is the main gas that makes up the Earth's atmosphere?
tysm

Sagot :

Sailoreisceidn

Diamond is the hardest natural substance on Earth. While, Nitrogen, Oxygen, Argon, and Carbon dioxide are the main gases that makes up our Earth's atmosphere.

What is diamond

  • Diamond - is the hardest natural substance on Earth.
  • Diamonds are made of carbon atoms that are arranged in a very strong and tight structure. This makes them super tough and hard to scratch.

Gases in Earth's Atmosphere

Main Gases

  • Nitrogen (N2) - About 78% of the air we breathe is nitrogen. It helps keep our atmosphere stable.
  • Oxygen (O2)**: About 21% of the air is oxygen, which is what we need to breathe and stay alive.
  • Argon (Ar) - This is a small part of the air (about 0.93%) and is used in some light bulbs.
  • Carbon Dioxide (CO2) - This gas is only about 0.04% of the atmosphere, but it's important for plants. This is important because plants use this to make their own food.

Other Gases

  • water vapor
  • neon
  • methane

They only make up a very small part of the atmosphere.

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