Sink 1.Todescendtothebottom;submerge. 2.Tofallordroptoalowerlevel,especiallytogodownslowlyorinstages:The waterinthelakesankseveralfeetduringthelong,drysummer. PriorKnowledgeAssessment: 1.Introducetheunittothestudentsbyaskingthemwhattheyknowabout theconceptsofthewordssinkandfloat. ...
only slightly wadding a piece of aluminum foil and try to float it on water. Now make a second ball using the same size of aluminum foil but this time make it into a tight ball and see what happens.The density of the second ball is greater so it will sink more than the first one....
From this test, we know that wood things usually float; metal things, glass things and some plastic things usually sink. 实验2:探索铝箔纸小船及其反复折叠后的浮沉及可能原因。 T: Metal ball sinks, metal key sinks.(教师指水缸中对应物品)The aluminum foil is also metal, will this metal boat ...
Provide the name of the product and its density. Assessment Sink or Float? Working with Densities Density Worksheet Part A: Revisiting Density: When chemists perform separations, looking at the densities of chemicals are important. Density is expressed in terms of an amount of mass per unit of ...
nodejs convert to CSV and write file (click to show) var output_file_name = "out.csv"; var stream = XLSX.stream.to_csv(worksheet); stream.pipe(fs.createWriteStream(output_file_name));https://github.com/sheetjs/sheetaki pipes write streams to nodejs response....
I change its shape, it doesn’t look like a boat, and it’s made of metal, so it sinks. (2)初步练习运用多角度思维 T: Mass, shapes and materials, they are related to “float or sink”. Usually they work together. PPT和板书相继出示浮沉相关因素的韦恩图(见图3)图3 浮沉相关因素韦恩图...