Article 1: “Atmosphere Formation” (https://scijinks.gov/atmosphere-formation/)

This article explains how the Earth’s atmosphere was formed. It tells us that the atmosphere is the layer of gases that surrounds our planet. Long ago, when the Earth was very young, it didn’t have an atmosphere. But over time, gases like nitrogen, oxygen, and carbon dioxide were released from volcanoes and other sources. These gases slowly built up and created the atmosphere we have today. The article also mentions that the atmosphere helps protect us from the Sun’s harmful rays and keeps the Earth warm.

Article 2: “The Atmosphere” (https://forces.si.edu/atmosphere/02_02_00.html)

This article talks about the different layers of the Earth’s atmosphere. It tells us that the atmosphere is divided into five layers: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has its own unique characteristics. For example, the troposphere is the layer closest to the Earth’s surface and where weather occurs. The stratosphere contains the ozone layer, which protects us from the Sun’s ultraviolet rays. The article also explains how the atmosphere is made up of different gases, such as nitrogen, oxygen, and carbon dioxide.

Article 3: “Evolution of Earth” (https://www.scientificamerican.com/article/evolution-of-earth/)

This article talks about how the Earth has changed over billions of years. It tells us that the Earth was formed around 4.6 billion years ago and has gone through many changes since then. For example, the continents have moved around, mountains have formed, and different life forms have evolved. The article also mentions that the Earth’s atmosphere has changed over time. In the early days, the atmosphere had a lot of carbon dioxide, but as plants evolved, they absorbed the carbon dioxide and released oxygen, which changed the atmosphere to what it is today.