EXPERIMENTING WITH PHYSICAL PROCESSES

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1 EXPERIMENTING WITH PHYSICAL PROCESSES Student s worksheets Anabel Borràs González January-April 2009

3 IS IT MAGNETIC? Which things will be attracted to the magnet? Object 2p coin Prediction: will it be magnetic? Result: is it magnetic? 5p coin Ruler Pin Pencil Paper-clip Paper Foil Glass jar Eraser Bottle top Nail Plastic lid Metal lid Anabel Borràs González 1

4 MAGNETIC AND NON-MAGNETIC OBJECTS Magnetic Non-magnetic Anabel Borràs González 2

5 STRENGTH OF A MAGNET 1- Draw how much the lever rose and the distance between both magnets: Big magnet Small magnet 2- Will the magnet work through these objects? Object Prediction: will it move the clip? Result: did it move the clip? Plastic lid Glass jar Wood (table) Metal lid Thin book Foil Paper Anabel Borràs González 3

6 MAGNETIC FORCES Do the poles attract or repel? N S S N SOUTH pole + SOUTH pole = S N S N NORTH pole + SOUTH pole = S N N S NORTH pole + NORTH pole = The poles of two magnets that are different will The poles of two magnets that are the same will Anabel Borràs González 4

7 MAGNETIC FIELDS Draw the effect of the magnet on the iron filings. Anabel Borràs González 5

8 COMPASS 1- Fill in the gaps with the correct word from the box: compass 9th magnet North Chinese The Earth behaves as if there is a giant bar running through its middle from pole to pole. A always points to the Earth s pole. It was invented by the in the century. 2- Complete with the cardinal points: Anabel Borràs González 6

9 LIGHT AND REFLECTION 1- Stand the mirror along the line in each box. Look at the reflection and draw it behind the mirror. 2- Now complete the sentences with the help of the cards: a) Light travels in lines called. b) occurs when light rays objects. c) A reflects well because the surface is. d) When you in a mirror you see things. e) The of a mirror is called. Anabel Borràs González 7

light rays through the lenses: makes things makes things and light rays

10 LENSES 1- Where can we find lenses? 2- Fill in the gaps with a word from the box and draw the action of light rays through the lenses: makes things makes things and light rays and light rays a convex lens / a concave lens come together / bend outward bigger / smaller Anabel Borràs González 8

11 RAINBOWS 1- How many colours has a rainbow got? In which order can we see them? 2- Draw how light splits into a rainbow when it travels through a prism. 3- Complete the text with a suitable word from the box: indigo prism spectrum Newton rainbow discovered that light through a was refracted into 7 colours. These are the colours of the ; red, orange, yellow, green, blue, and violet. This is called the light. Anabel Borràs González 9

12 DOES IT DISSOLVE? 1- Fill a jug with water. 2- Add the substance. 3- Stir 4- Does it dissolve? Substance Prediction Will it dissolve? Result Did it dissolve? Does the water change colour? sugar salt sand flour sawdust pepper bicarbonate coffee Anabel Borràs González 10

13 SOLUBLE INSOLUBLE SUBSTANCES Classify the materials you tested into the correct category: SOLUBLE SOLUBLE substances dissolve in water don t dissolve INSOLUBLE INSOLUBLE substances dissolve in water don t dissolve Anabel Borràs González 11

14 SEPARATING MIXTURES 1- Match the correct process with its definition: decanting magnetism filtering sieving Separates different sized solids. Separates insoluble solids from liquids. Separates 2 liquids which have different weights. Separates magnetic from non-magnetic materials. 2- Now decide which method is better to separate these mixtures: Paper clips + sand Flour + rice Sand + water Oil + water Sawdust + pins Sawdust + water Sand + rice MIXTURE PROCESS TO SEPARATE IT Anabel Borràs González 12

15 REVERSIBLE IRREVERSIBLE CHANGES Mixtures Prediction Will it react? Result Did it react? Reversible / irreversible? Bicarbonate of soda + water Bicarbonate of soda + vinegar Bicarbonate of soda + lemon juice Soda + water Soda + vinegar Soda + lemon juice - Bicarbonate of soda reacts when mixed with - Soda reacts when mixed with Other mixtures that react are: Anabel Borràs González 13

Science Department The Egyptian Language School 5 th primary. Revision sheet. 1. The shadow of an object is formed because light travels in

Science Department The Egyptian Language School 5 th primary. Revision sheet. 1. The shadow of an object is formed because light travels in Name : date : Class : Revision sheet Q1: Complete the following sentences: 1. The shadow of an object is formed because light travels in. 2. The image formed through narrow holes is.... And.. 3. Light