3 12 forces and motion (physical science)

... science, the word work has a special meaning Work is done when force moves an object People have invented simple machines to the same amount of work with less force Riding a bicycle is work In this ... tire How Brakes Work Hand brakes rest on both sides of the wheel When you pull the controls, the brakes pinch the wheel This makes friction that slows down the bike wheel caliper br...

Ngày tải lên: 20/04/2017, 15:33

... help you talk about position Use meters and centimeters to measure meter 11 centimeters Learning About Motion Motion is the act of moving In what way things move? Some things move back and forth ... moves fast on the road 10 11 Learning About Tools and Machines How tools and machines help us? Tools and machines use pushes and pulls to make things move Tools and machi...

Ngày tải lên: 31/10/2014, 14:31

... things move back and forth Some things move around and around The car and the bicycle are in motion Motion has speed and direction Push your bicycle pedals to change speed Turn the handlebars to ... tools and machines make things move? Tools and machines help us jobs Tool and machines can push, pull, and move things A hammer is a tool It can help push a nail into wood Using...

Ngày tải lên: 31/10/2014, 14:39

... Forces and Motion PHYSICS IN ACTION Energy Forces and Motion The Nature of Matter Planets, Stars, and Galaxies Processes That Shape the Earth Forces and Motion Amy ­Bug Series ... distance and displacement, D and ∆d, will be ­identical: D = ∆d = δd          in the limit that δt becomes extremely ­small 33 34 forces and motion In this limit, s = vave = v          fo...

Ngày tải lên: 14/11/2014, 08:58

... friction between the wheels and the sand makes the skates slow down When you rub your hands together, they warm up The friction between your hands makes heat Roller-skating on sand is hard! A gentle ... words force and gravity How Objects Move Objects move in many ways We call the act of moving motion You can push a crayon across a piece of paper in a straight line or a zigzag motion...

Ngày tải lên: 03/10/2015, 21:39

Ngày tải lên: 22/02/2014, 08:20

... listen carefully and remar b- White- listen Reads times c- Post-listen Call some Ss read again Activity3(10’) Look and say Look and say - Read follow teacher ( 2-3 times Guide Ss to say follow ... one - Guide Ss to talk answers - Call some pairs talk in front of the Other listen and remark class C: Where ……………………….? D: …………………… IV Other activity: Play game: Let’s talk -...

Ngày tải lên: 23/07/2014, 14:22

... activity: Play game: Let’s talk -Guide Ss to exercises -Play game -T remarks the lesson - < /b> Do exercises 7, in work book -Learn by heart new words and < /b> structures -Prepare next lesson  ... It’s one hour by plane Are we going by bus? Yes, it’s about two hours Some Ss give result Other listen and < /b> remark Listen and < /b> check: T or F Key: F F T We’re going by plane It’s F...

Ngày tải lên: 23/07/2014, 14:22

... S 2: No, I don’t S 3: Do you watch TV? S 2: No, I don’t Pre writing  Pre teach Free time = spare time (to) go fishing (to) go to the movies  Picture drill: B1 (P127) a→f Exchange: S 1: What ... your free time? S 2: I go to the movies  Transformation drill: B1 P127 Exchange: S 1: What does (Phuong) in his spare time? S 2: He goes to the movies  Transformation writing...

Ngày tải lên: 06/08/2014, 08:20

... pairs to read the dialogue in front of the class - T: corrects their pronunciation - T: asks Ss to look at the questions then work in pairs : one asks and one asnwers - T: calls on some pairs to ... Grandmother 60 - Ss: ask and answer about the information in the grids EX: S 1: How old are you? S 2: I’m 13 - T: remarks and demonstrates the group which wins the game B...

Ngày tải lên: 06/08/2014, 16:20