light up science （科学）3b unit 1 measurement lesson 1 measuring ma

1、整理课件How long is a pencil?How much water is there?How heavy is an apple?Measurement is everywhere!整理课件gram (克克)mass (质量质量)measure (测量测量)scales (秤秤)Lesson 1 Measuring Mass整理课件Is a banana heavier than an apple?Lets find out!整理课件Your mass is what makes you heavy.I am heavier than a mouse. I have more ma

2、ss.整理课件A mass has a number and a unit, such as 20 grams (g). We use scales to measure mass.There are 1000 grams in 1 kilogram (kg).整理课件Read the scales below. Write the mass.The mass of the potatoes is _. 800 gThe mass of the mouse is _. 50 g整理课件Add the masses.Make five plasticene balls.整理课件Measure t

3、he mass of each ball. Add them up.BallMass (g)12345Sum整理课件Put all the plasticene balls on the scales.The total mass is _.Is the sum equal to the total mass? _.Yes整理课件Make one piece of plasticene into different shapes. Measure the mass of each shape.Mass (g)Are the masses the same? _.Yes整理课件How can y

4、ou measure mass? Sing the song.Measure your mass, how much do you weigh?You can use the scales today.Stand quite still and you will understandThat your mass is measured in kilograms.A pear weighs much less than a kilogram.Put one on the scales today.The mass will be about 100 grams Much less than a kilogram.整理课件Mass is what makes you heavy.I can use scales to measure mass.If an object changes its shape, it has the same mass.整理课件I made some measurements.I used scales.I weighed an elephant.整理课件整理课件What are the masses? Draw lines.整理课件How can you balance the scales? Circle the masses.Scales al