Grade 3 Science Unit 3 Lesson 1

EIS Educational Videos · ⏱ 4:36 · 80 مشاهدة · 5 years ago

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hello grade 3 welcome to our science lesson we are in lesson one what is motion our objective for today to recognize how unbalanced forces cause changes in speed and motion my lovely students please open your books on page 146 speed and direction speed is measure of time to move distance when things move they also move in direction suppose you want to go from your home to the library you want to go to the library as quickly as possible bus subway and train all go to the library to find which one gets to the library the fastest you must consider how fast it goes but also in which direction look at the first picture which subway to take in large city depends on how fast it gets you to your distance subway that goes in the wrong direction will not get you to your destination very fast look at the second picture in large cities cars are not always the fastest form of transportation during rush hour cars move very slowly or not at all sometimes cars are stopped at traffic lights also we are still on page 146 question 12. explain how to cars traveling to the same place and the same speed could get there at different times will give you time to think then we'll answer this question together are you ready let's start yes if one car traveled different route and longer and shorter distance now have question for my clever students how is our system of roads different from our railway train track system which one do you think offers more choices in terms of speed and direction excellent there are far more roads than railways and they go in many different directions there is more flexibility in traveling in roads but railway may be straighter and involve less traffic now let's go to page 147 question 13 transportation map complete the chart with data from the map to help decide which vehicle would get you from home to the library fastest look at the bus number of stops for its speed slow distance medium now let's look at subway number of stops can you count them with me very good three it's speed yes it is fast distance long look at the train number of starts very good six it's speed do you think it's slow medium or fast very good it is fast what about the distance it is short please fill the chart in your books we are on page 147 now question 14 which vehicle do you take and why write your answer below train subway bus what is it excellent the train is the fastest even though it has the most stops it's the most direct route and it has fast speed prefer train to my little scientists thank you for watching this video see you soon bye bye