Science Revision (Eco Systems and Chemical Reactions)

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1. Which Equation makes Crystals?

  • Something Else!
  • Copper Oxide + Hydrochloric Acid= Copper Oxide Chloride+ Water
  • Metal +Acid=Salt+Hydrogen
  • Metal Carbonate+ Acid= Salt+ Carbon Dioxide+ Water
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2. What is a smart materal?

  • Something else!
  • It has properties that react to changes in their envivoment
  • It something that can change colour to its enviroment.
  • It is a device like a smart phone or smart tv.

3. What is polymers?

  • A row of 1+ molecule
  • A type of Molecule
  • Converting waste to something new
  • A type of Atom

4. Which of these is the wrong answer?

  • Metal tools= stiff,strong in tension and compression
  • House Brick=stiff,strong in tension and compression
  • Crackers=stiff but brittle
  • Custard=soft,flexible,weak

5. The word equation ' Magnisium Carbonate+ Hydrochloric Acid= MagnesiumChloride+ Water+Carbon Dioxie' in a symbol form is.....

  • MgH20+CO3=MgCo2+H20+CO2
  • MgCO3 +H2SO4= MgSo+H20+CO2
  • Mg+H20S= MgSo2 +CO2
  • MgH0+CO3+MgHy +CO2

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