"Observing the Tide" PPT courseware 6

"Observing the Tide" PPT courseware 6

Causes of tidal surge in Qianjiang River

In addition to the gravitational influence of the moon and the sun, the cause of the majestic Qiantang River tide is also related to the trumpet-shaped shape of the Qiantang River estuary. Nearly 500,000 acres of reclaimed land east of Zheshan on the south bank of the Qiantang River blocks the river mouth like a peninsula, making the Qiantang River section from Zheshan to the Outer 12th Works resemble a bottle with a big belly and a small mouth. The tide is easy to enter but difficult to retreat. The outer mouth of Hangzhou Bay is 100 kilometers wide. , the outer 12th section is only a few kilometers wide, and the riverbed in the eastern section of the river mouth suddenly rises again, and the beach is high and the water is shallow. When a large amount of tide water pours in from the Qiantang River mouth, the river surface shrinks rapidly and the tide has no time to rise evenly, so it has to be pushed back by the waves. The front wave, the front wave cannot run fast, and the back wave catches up, layer by layer. Secondly, it is also related to the large amount of sedimentation in the Qiantang River. These sedimentation blocks and frictions the tide, making the front slope of the tide steeper and slowing down the speed, thus forming the back wave to catch up with the front wave, one wave after another, one wave after another, one wave higher than the other. tide.

I will admit it

Shrouded and standing

The traverse is still recovering

Landslide and ground cracking, looking eastward with head raised

The looming crowds of people look eastward with their heads raised

Muffled thunder rolls, people are shouting, the wind is calm and the sea is calm

The water and the sky meet, across the river, and go hand in hand

The vastness fills the sky and the earth, the wind howls and the waves roar

It describes people's voices being noisy and chaotic, like water boiling in a pot. (A huge crowd)

The wind and waves were calm. (calm and calm)

Describing the vastness of the water, the distance and the sky seem to be connected. (water and sky meet)

Describe starting at the same time and moving forward at the same time. (Going hand in hand)

The rocks and soil on the mountain collapsed, and the ground cracked. The sound was very loud. (Landslide and ground cracking)

Describes great momentum. (vast and mighty)

Today, I went to Qiantang River to watch the tide. Before the tide comes, on the river ( ). But when the tide comes, the tide is ( ), ( ). The sound of the tide is like ( ), and even though it is ( ) on the seawall, I can't hear what is being said. Gradually, the tide passed and disappeared in ( ) place.

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PPT courseware for the second lesson of "Observing the Tide":

"Observing the Tide" PPT courseware for the second lesson Part One: Self-study tips: 1. Read the text silently, imagine the picture while reading, and draw your favorite scene with a pen circle. 2. Group cooperative inquiry and learning. 3. Each group will proceed in the order of before the tide comes, when the tide comes, and after the tide.

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"Observing the Tide" PPT for the second lesson:

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