根据“Light comes from the sun. It also comes from flashlights, candles and streetlights.”可知光来自太阳、手电筒、蜡烛和街灯。故选B。2.细节理解题。根据“Sound is made when something vibrates”可知声音是通过振动产生。故选A。3.主旨大意题。根据“Light, heat and sound are forms of energy. ...
Electricity produces light, heat, and sound energy. ___ addition, electric power operates many kinds of equipment, tools, and machines, which make work easier. A. To B. By C. In D. On 相关知识点: 试题来源: 解析 A 反馈 收藏
Melvin Berger
Heat comes from many things.The sun makes the earth's land,water and air warm.We get heat from burning things like wood or coal.Heat is an important energy for us.Heat makes our body and our homes warm in winter.We also use heat to cook. Sound is a kind of e...
Energy makessthingsEnergyhappen. Heat, light and soundare all forms(形式)ofKineticenergy, and there are manyothers too. The different typesof energy can be divided upinto two groups: kinetic and potential energy.Potential energy(势能) is energy that is stored, ready to use.Anything that could...
课本原文There are many kinds ofenergy(能),including light,heat,electricity, and sound. One kind ofenergy can also change into another.Solar energyHeat from the sun warms the air,land, and sea. Plants use the energy in sun-light to make their own food. We can usesolar panels to change...
Nature's Miracles Volume 2; Energy and Vibration Energy, Sound, Heat, Light, Explosives. 1900 作者: Gray, Elisha 页数: 52 ISBN: 9781235841187 豆瓣评分 目前无人评价 评价: 写笔记 写书评 加入购书单 分享到 推荐 我来说两句 短评 ··· 热门 / 最新 / 好友 还没人写过短评呢 我要写书评 ...
Worksheet Print Worksheet 1. Which of the following is an example of diffuse reflection? A. Reflection off a still pond B. Reflection off a gravel road C. Reflection off the sand on a beach D. Reflection from a window pane A and D B and C A and B C and D 2. Th...
Ch 17.Foundations of Energy & Heat Ch 18.Foundations of Magnetism Ch 19.Fundamentals of Mechanics Ch 20.Lab Equipment for Scientific... Ch 21.Measurement & the Metric System... Ch 22.Nuclear Energy Fundamentals Ch 23.Planning a Scientific Investigation Or... ...
The fans can produce___ energy.A.soundB.heatC.movingD.light 相关知识点: 试题来源: 解析 sound 声音;heat 热;moving 移动;light 光。根据语境"风扇能产生___能。"和物理知识。可知风扇在转的时候能产生动能,因此"moving"符合题意。故选:C。反馈 收藏...