Sink or float? - greatschools.org

1 28/2/06 10:14 PM Page 23 (Cyan plate) 23 Sink or float ? ObservationsWhen you place things in water, some of themfloatand some of them that float stay on top of the water. Things that sink go to the bottomof the explorationGather some small and test if they float orsink. Do the activity on website activityHere are some pieces of fruit that have been placed in a bowl of water. Colorthe ones that float blue and those that sink, 28/2/06 10:15 PM Page 23 (Black plate) Dorling Kindersley Limited [2010] Dorling Kindersley Limited [2010]The child learns to distinguish between natural andfactory-made materials.

2 This can be a difficult children may ask if one is better than the answer should be related to use, more thanenvironmental impact, at this It s natural! ObservationsSome things come from nature. They are natural. Leather, for example,comes from the skin of a cow and is often used to make shoes. Some thingsare made from the parts of a plant. Cotton, for example, is used to make cotton shirts. Other things, such as plastics,are made in activityDraw a line joining each material to the place it comes explorationsheepcottonplantfactorysilk wormrubbertreetreenylon tightssilk tieglasswooden tablerubber tirecotton threadplastic cupwoolThe child will design an experiment to see which paperbest wipes up water.

3 Encourage the child to explain hisor her prediction. Paper towels, tissues, toilet paper,and writing paper can all be used. Ask the child whichpaper would do the worst job. 21 Paper goods ObservationsPaper is made by mixing small pieces of wood with water and chemicals. Paperis used to make books, newspapers, toilet paper, tissue paper, writing paper,wrapping paper, cardboard, paper cups, and many other everyday activitySome types of paper are stronger than others. They can hold other objectswithout breaking. For example, a paper plate can hold food. Which types ofpaper below are strong, and which are not strong?

4 Place a check mark ( )in the correct box in the paper towel writing paper tissues tissue paper toilet paper cardboard paper cup wrapping paper Science explorationStrongPaperNot strong The child learns that some materials are transparent,some translucent, and some opaque. The terms are notneeded, just the concepts. Encourage the child to testobjects other than those noted in the Is it see-through? ObservationsYou can see through some materials, but not others. If you shine a flashlighton a material that is not see-through, light cannot pass through it. Somematerials are not see-through, but if light is shined on one of side of them, aglow can be seen on theother activityPlace a check mark ( ) in the correct box to show if you think each materi-al is see-through, not see-through, or is not see-through but you can see aflashlight glow through explorationSee-throughMaterialNot see-throughSee flashlightglowkitchen foilplastic cling filmtissueswooden toyglass windowcloth handkerchiefglass of water The child learns that some things that feel heavy mayfloat, while some things that feel light may sink.

5 Theexplanation is too complex for this age. However, ifthe child has a toy boat, have him or her add penniesto the boat to see if it will eventually Sink or float ? ObservationsWhen you place things in water, some of themfloatand some of them that float stay on top of the water. Things that sink go to the bottomof the explorationScience activityHere are some pieces of fruit that have been placed in a bowl of water. Colorthe ones that float blue and those that sink, 1/3/06 1:50 AM Page 100 (Black plate)The child learns that some things that feel heavy may float , while some things that feel light may sink.

6 The explanation is too complex for this age. However, if the child has a toy boat, have him or her add pennies to the boat to see if it will eventually sink. Dorling Kindersley Limited [2010]