First, the experiment of saving bubbles is very interesting. The materials needed are soap, straws, plates and refrigerators! First put the soap into the water to make a basin of soapy water, adjust the temperature of the freezer to a minimum, blow out several big bubbles on the plate with a straw, quickly put the plate into the freezer of the refrigerator, and then take it out of the refrigerator later! Wow! Bubbles freeze into frozen bubbles! Now your bubble can be kept forever as long as it doesn't melt!
Second, learn the materials for crabs to spit bubbles, a bottle of coke, a toothpaste and a toothbrush, and start the experiment. Just like I brush my teeth every morning and evening, I brush my teeth according to the normal steps. After brushing your teeth, don't rinse your mouth. Take a sip of coke and you will feel that there are many small bubbles dancing in your mouth. Open your mouth and spit it out like a crab. This experiment is very interesting!
On Saturday, my father and I went to the book building to buy study materials. After buying it, I couldn't wait to drag him to the science and technology book area. Obsessed with scientific knowledge, I saw the earth at a glance because its cover picture is very beautiful. I read a few articles and begged my father to buy them for me, and my father readily agreed.
This book is mainly about natural phenomena on the earth. It has wonderful contents: majestic mountains, colorful lakes, deep canyons ... super wonderful themes, nearly a thousand knowledge points, new secrets of unknown earth. Scientific subject classification and interpretation originates from the most authoritative knowledge system in the world today and absorbs the latest international research results. There are exquisite and rich pictures in this book: precious aerial photos, pictures of how to use them, clear photos on the spot ... nearly a thousand beautiful pictures, offering a visual feast. That's why my father and I bought this book to read together.
Every article in this book is very wonderful and specific. One of them, the continental drift, has taught me more about the earth: the continent is actually floating and constantly moving. First of all, it tells us that Wei Gena, a German meteorologist and geophysicist, put forward the continental drift hypothesis comprehensively and systematically for the first time. Wei Gena's viewpoint is very detailed and clear, explaining the crustal movement, the distribution of land and sea and its evolution law, and inserting three schematic diagrams beside the text. The first was 200 million years ago, when most of the continents were connected, the second was slightly separated, about 65.438+80 million years ago, and the last was 65 million years ago. The three pictures vividly reflect the drift and evolution of the earth's continent. There is also a computer-stitched map of the mainland, which strongly supports the view that all continents were once a whole.
There are also articles on life evolution, meteorological wonders, volcanoes and so on, which really opened my eyes and amazed me.
When reading this book, my father and I had different views on many articles, which caused a lot of arguments, and one of them made me very proud.