Science 7 · Unit 5: Properties of materials · Cambridge Lower Secondary Science Stage 7

Questions

1. 📖 This question is about a text that students read in the app.

   1. Sofia says helium is a non-metal. Is she correct?

   • Yes, helium is a non-metal.
   • No, helium is a metal.
   Check

2. 📖 This question is about a text that students read in the app.

   2. Sofia says carbon is a metal. Is she correct?

   • No, carbon is a non-metal.
   • Yes, carbon is a metal.
   Check

3. 📖 This question is about a text that students read in the app.

   3. Sofia says sulfur is a metal. Is she correct?

   • No, sulfur is a non-metal.
   • Yes, sulfur is a metal.
   Check

4. 📖 This question is about a text that students read in the app.

   4. How many metals does Sofia think there are in her list?

   • 8
   • 5
   • 3
   • 4
   Check

5. 📖 This question is about a text that students read in the app.

   5. What is the correct number of metals in Sofia's list?

   • 4
   • 5
   • 3
   • 2
   Check

6. 📖 This question is about a text that students read in the app.

   6. How many non-metals does Sofia think there are in her list?

   • 3
   • 2
   • 5
   • 8
   Check

7. 📖 This question is about a text that students read in the app.

   7. What is the correct number of non-metals in Sofia's list?

   • 4
   • 3
   • 6
   • 5
   Check

8. 8. Which of these elements are all metals?

   • silver, sulfur and iron
   • oxygen, helium and nitrogen
   • silver, copper and iron
   • carbon, copper and iron
   Check

9. 9. How can you test whether a solid conducts electricity?

   • Put it in water.
   • Hit it with a hammer.
   • Hold a magnet near it.
   • Put it in a circuit with a cell and a lamp, and see if the lamp lights.
   Check

10. 10. True or false: All metals are magnetic.

    • False, only a few are, such as iron, nickel and cobalt.
    • True, all metals are attracted to magnets.
    Check

11. 11. True or false: Solid non-metals are brittle.

    • True
    • False
    Check

12. 12. True or false: All metals are solids at room temperature.

    • False, mercury is a liquid.
    • True, every metal is a solid.
    Check

13. 13. True or false: Metals conduct heat energy.

    • True
    • False
    Check

14. 14. True or false: Non-metals are good conductors of electricity.

    • False, most non-metals are insulators.
    • True, all non-metals conduct well.
    Check

15. 📖 This question is about a text that students read in the app.

    15. Substance A is a shiny liquid that conducts electricity. What is it?

    • mercury, a metal
    • water, a non-metal
    • oxygen, a non-metal
    • sulfur, a non-metal
    Check

16. 📖 This question is about a text that students read in the app.

    16. Substance B has a black conducting form and a transparent, very hard form. What is it?

    • mercury, a metal
    • carbon (graphite and diamond), a non-metal
    • helium, a non-metal
    • iron, a metal
    Check

17. 📖 This question is about a text that students read in the app.

    17. Substance C is a transparent gas needed for respiration. What is it?

    • helium, a non-metal
    • carbon, a non-metal
    • nitrogen, a non-metal
    • oxygen, a non-metal
    Check

18. 📖 This question is about a text that students read in the app.

    18. Substance D is a very light, unreactive gas. What could it be used for?

    • making wires
    • breathing underwater
    • making jewellery
    • filling balloons (it is helium)
    Check

19. 📖 This question is about a text that students read in the app.

    19. Substance E is a reddish, shiny solid that conducts heat and electricity well. What is it?

    • sulfur, a non-metal
    • carbon, a non-metal
    • zinc, a non-metal
    • copper, a metal
    Check

20. 📖 This question is about a text that students read in the app.

    20. Substance F is a yellow, brittle solid that does not conduct electricity. What is it?

    • gold, a metal
    • mercury, a metal
    • copper, a metal
    • sulfur, a non-metal
    Check