"The Earth's Cosmic Environment" The Earth in the Universe PPT high-quality courseware

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"The Earth's Cosmic Environment" The Earth in the Universe PPT high-quality courseware

Part One: Human understanding of the universe

"The sky is round and the earth is round" is ancient science's understanding of the universe.

Copernicus proposed the heliocentric theory and completed his great work "On the Revolution of the Celestial Bodies" after years of observation and calculation.

The 500-meter Aperture Spherical Radio Telescope (FAST), known as the "China's Sky Eye", is the world's largest single-aperture and most sensitive radio telescope. It was completed in Guizhou in September 2016.

The universe is the sum of all time, space and matter, and is the entirety of our material world.

Astronomers call the limited universe that humans have observed the "visible universe."

The radius of the "visible universe" is approximately 13.7 billion light-years.

Earth’s cosmic environment PPT, part two: multi-level celestial system

star

A spherical body composed of hot gas that can emit light by itself.

nebula

A cloud-like object composed of dust and gas

The density is small, the temperature is low, and the volume and mass are large.

meteoroid

Dust particles and small solid pieces traveling in interplanetary space are called meteoroids.

comet

A celestial body with a very small mass that orbits the sun in an elongated orbit and is composed of icy material.

Basis for judging celestial bodies

outside the earth's atmosphere

Must be the matter in the universe

part of a celestial body that is not attached to

Milky Way and Extragalactic Galaxies

The Milky Way and extragalactic galaxies are mainly composed of relatively large celestial bodies such as stars;

In addition, there are many cloudy objects composed of dust and gas called nebulae.

There are some objects outside the Milky Way that look like nebulae, but are actually extragalactic galaxies.

Solar System and Earth-Moon System

The solar system consists of the sun, planets, dwarf planets and satellites, as well as small solar system bodies such as asteroids, comets, meteoroids and interplanetary materials. The mass of the sun accounts for approximately 99.86% of the mass of the entire solar system.

Earth’s cosmic environment PPT, the third part: Special planet—Earth

Why is the earth said to be a special planet?

The earth has the conditions for life to exist;

Adequate moisture

Just the right thickness of atmosphere;

Atmospheric composition suitable for living things to breathe

The earth produced the only advanced intelligent life known so far - human beings;

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For more information about the PPT courseware "The Earth in the Universe and the Earth's Cosmic Environment", please click on the "Earth in the Universe ppt Earth's Cosmic Environment ppt" tag.

"The Influence of the Sun on the Earth" Earth in the Universe PPT download:

"The Influence of the Sun on the Earth" PPT download of the Earth in the Universe Part One: Goal Setting 1. Understand the energy source of solar radiation, the composition of the solar atmosphere, and the concepts and types of solar activity. 2. Understand the impact of solar radiation on the earth and the effects of solar activity...

"Earth's Cosmic Environment" The Earth in the Universe PPT quality courseware:

"Earth's Cosmic Environment" The Earth in the Universe PPT quality courseware Part One: Learning Objectives 1. Use information to describe the celestial system in which the Earth is located. 2. Use data to describe the Earth’s position in the solar system. 3. Learn to analyze the conditions for the existence of life on earth..

"Earth's Cosmic Environment" Earth in the Universe PPT free courseware:

"Earth's Cosmic Environment" Earth in the Universe PPT free courseware Part 1: Basic review 1. Human understanding of the universe 1. Universe: The sum of all _________, _________, and matter. 2. Observable Universe: The limited space that humans have observed...

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Update Time: 2024-10-03

This template belongs to Geography courseware Hunan Education Edition High School Geography Compulsory Course I industry PPT template

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