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Class 3 The World Around Us — This world of things

Say what the things around you are made of and where the material came from, sort solids from liquids and gases, and tell transparent from translucent from opaque.

Name: ________________________

Before you start

Three panes with the same lamp behind each, and the word for each one.

123
  1. 1. Transparent
  2. 2. Translucent
  3. 3. Opaque

Same lamp behind each pane. The first shows it sharply, the second shows a faint glow where it is, and the third shows nothing — so the third pane could be hiding anything.

  1. 1.What does the chapter say a solid is?

    • a) Something that does not change its shape
    • b) Something that feels cold to the touch
    • c) Something you cannot see through
    • d) Something heavy enough to sink

  2. 2.The chapter says natural things may be alive or not alive. Which of these does it give as a natural thing that is not alive?

    • a) A shirt
    • b) A pair of shoes
    • c) A rock
    • d) A table

  3. 3.Sort each of these into solids, liquids and gases.

    Groups: Solid · Liquid · Gas

    • Ink
    • Air
    • Spoon
    • Honey
    • Stone

  4. 4.In the chain game, what does the chapter give as the source that wood comes from?

    • a) Sand
    • b) A field
    • c) A rock
    • d) A tree

  5. 5.Sort these into things that exist in nature and things people have made.

    Groups: Natural · Artificial

    • Table
    • Shoes
    • Air
    • Clothes
    • Rock
    • Water

  6. 6.The chapter gives one surprising fact about what glass is made of. What is it mostly?

    • a) Sand
    • b) Ice
    • c) Clay
    • d) Salt

  7. 7.The chapter closes with these pairs. Match each word to the thing it describes.

    • Transparent
    • Translucent
    • Opaque
    • a lamp shade made of paper
    • a glass used in spectacles
    • a plate

  8. 8.Where do the metals in the door hinges and nails come from?

    • a) They are collected from the beds of rivers
    • b) They are extracted from rock and sediment dug up from inside the Earth
    • c) They are made by mixing sand with water
    • d) They are grown in fields and then heated

Answer key — Class 3 The World Around Us — This world of things

  1. 1. a) Something that does not change its shape
  2. 2. c) A rock
  3. 3. Stone → Solid; Spoon → Solid; Ink → Liquid; Honey → Liquid; Air → Gas
  4. 4. d) A tree
  5. 5. Rock → Natural; Water → Natural; Air → Natural; Clothes → Artificial; Shoes → Artificial; Table → Artificial
  6. 6. a) Sand
  7. 7. Transparent → a glass used in spectacles; Translucent → a lamp shade made of paper; Opaque → a plate
  8. 8. b) They are extracted from rock and sediment dug up from inside the Earth