Teaching Design and Evaluation of The Sun What are the characteristics of learning the sun?

Teaching focus: Understand the characteristics of the sun and some of the explanatory methods used in the text. Teaching Difficulties:

Experience the effect of the method explained in the text. Learning situation analysis: Students feel the sunlight every day, and have some understanding of the shape of the sun, rising in the east and setting in the west, but do not fully understand it.

In the first lesson, interest is stimulated and topics are introduced. Ask students to report on what they have learned about the sun before class. The teacher reads aloud the after-class materials to let the students know about the sun again.

Sun Comments: The interaction between teachers and students stimulates students' interest in the text, improves students' enthusiasm for learning, and mobilizes students' initiative. Read the text for the first time and memorize new words.

1. Read the text freely, and mark new words and words.

2. Look up the dictionary to solve new words and words.

3. Recognize and memorize words and words independently. Comments: Use the learned literacy methods to fully mobilize students' literacy accumulation and continue to cultivate students' independent literacy ability. Self-reading and self-realization, overall perception.

The sun has three characteristics: far, big, and hot.

The sun has three characteristics: far, big, and hot.

Teaching Analysis: The Sun is an expository essay that is divided into two parts, using a series of numbers, analogies and other explanatory methods to introduce the characteristics of the sun and the close relationship between the sun and human beings. The purpose of compiling this text is to learn how to read expository texts and improve reading skills, and secondly, to learn more about the characteristics of the sun and cultivate a love for science.

Teaching Objectives: 1. Knowledge Objectives: Learn the words of this lesson, read the text correctly and fluently with feelings, and understand the characteristics of the sun and the close relationship between the sun and human beings.

3. Emotional attitude and values: cultivate students' curiosity and strong desire for knowledge of natural science knowledge, comprehend learning methods in the learning process, and establish self-confidence in learning. Teaching difficulties:

The focus of this lesson is to understand the characteristics of the sun, and the difficulty is to know the close relationship between the sun and human beings.

2. Didactic Method.

This is an expository essay, which does not impart knowledge with the help of artistic images, but uses accurate and popular language to explain things and impart knowledge. So I'm focusing on the following aspects:

1. Group cooperation** learning.

2. Grasp the key words and sentences in the text, and understand the content.

3. Use audio-visual teaching methods to stimulate students' interest in learning. Compared with narrative essays, expository essays are relatively boring and less visual. With the help of courseware, I stimulate students' enthusiasm for active learning and mobilize students' multiple senses to accept knowledge, so as to enhance the learning effect.

The text "The Sun" introduces the three characteristics of the sun: far, large, and hot.

The first part of the text "The Sun" (paragraphs 1-3) introduces the characteristics of the sun in three aspects: far, large, and hot. Part 2 (4-8): The relationship between the sun and human beings.

Introduction to the Sun. The sun is made up of gases that burn brightly, emitting light and heat. Scientists believe that the sun can burn for about 10 billion years, and it has been around for about 5 billion years, so it can be said that the sun is now middle-aged.

As early as more than 2,000 years ago, our ancestors discovered that a black spot like a three-legged crow appeared on the dazzling sun, which is now called sunspots. This is the world's earliest record of sunspots.

The solar system is a collection of celestial bodies centered on the Sun and subject to the Sun's gravitational constraints. It includes eight planets (in descending order from closest to the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), as well as at least 173 known moons, five identified dwarf planets, and hundreds of millions of small bodies in the solar system.

Broadly speaking, the realm of the solar system includes the Sun, four Earth-like planets, an asteroid belt of many small rocks, four huge outer planets filled with gas, and a second small celestial region filled with frozen rocks known as the Kuiper Belt.

The knowledge of the sun is introduced from three aspects: far, large and hot.

The characteristics of the sun are explained from three aspects: long distance, large volume, and high temperature, which are the first three natural paragraphs of the article. The relationship with humans is explained from the aspects of the relationship with animals and plants, the formation of energy, the change of natural climate, and the prevention of diseases, and the last sentence is to summarize: Without the sun, there would be no beautiful and lovely world for us.

Location

The Sun is just a very ordinary star in the universe, but it is the central object of the solar system. In the solar system, eight planets, including our Earth, some dwarf planets, comets and countless other small bodies of the solar system orbit the sun under the strong gravitational pull of the sun.

The territory of the solar system is huge, taking Pluto as an example, its orbit is nearly 40 astronomical units away from the sun, that is, 6 billion kilometers away, and in fact, the scope of the solar system is dozens of times that of this.

The Sun revolves around the center of the Milky Way, and the period of its orbit around the center of the Milky Way is about one year. There may be a huge black hole at the center of the Milky Way, but it is surrounded by stars, so it looks like a "silver disk". These stars all revolve around the "silver core".

Unlike the Earth's orbit, these stars get closer to the "silver nucleus" with each orbit.

Lesson 16 "The Sun" after class exercises and answers.

Read the text silently and think: In what ways does the text introduce the sun? What are the effects of the sun on humans?

The text introduces the sun in the following ways: (1) the distance; (2) Large volume; (3) High temperature.

Purpose: Without the sun, there would be no beautiful and lovely world.

1) The sun brings light and warmth to the earth, without which there are no animals and plants.

2) Without the sun, we have nothing to eat and wear, and we have no coal.

3) The formation of clouds, rain, snow, and wind is inseparable from the sun.

4) Sunlight has the ability to kill bacteria, and we can use it to prevent and ** diseases.

The text "The Sun" introduces the three characteristics of the sun: far, large, and hot.

1. "The sun is 100 million kilometers away from us. ”

The characteristics of the far distance of the sun are illustrated by the column numbers.

2. "To the sun, if you walk, day and night, it will take almost 3,500 years; Even if you take a plane, you have to fly for more than 20 years. ”

The characteristics of the great size of the sun are illustrated by the column of numbers.

3. "The sun is very hot, with a surface temperature of 6,000 degrees Celsius.

Even if steel touches it, it will turn into steam; The core temperature is estimated to be 3,000 times the surface temperature. ”

The characteristics of solar heat are illustrated by column figures.

The text "The Sun" mainly uses examples, numbers, comparisons, and analogies. "The Sun" is a common-sense expository essay, the author in the introduction of the characteristics of the sun and its relationship with human beings, the use of the above figures, comparisons, metaphors, assumptions and other methods of explanation, the characteristics of the sun in the distance, the big and the heat of the sun and its close relationship with human knowledge, etc., the knowledge is both popular and concrete, with strong persuasive power, leaving a deep impression on people.

In the article "The Sun", when introducing the characteristics of the sun, the author uses a variety of explanatory methods to make the content of the text colorful and easy to understand.

Introduction to the text "The Sun".

The Sun is a popular science essay that introduces us to the characteristics of the sun and the close relationship between the sun and human beings in an easy-to-understand language, so that students understand the importance of the sun and arouse our interest in exploring the mysteries of nature.

The Sun text has a total of 8 natural sections, which can be divided into two parts. The first part is paragraphs 1 to 3; Part 2 is paragraphs 4 to 8 of the text. The focus of reading aloud in this text is to master how to read expository texts aloud.