Study

UNIT 3 - Grade 4

  •   0%
  •  0     0     0

      Back   Restart
  • What is the reddish-brown substance on the iron?
    Rust
  • Gold is example of ...
    Pure solid
  • This reaction can not turn back into the first form before they change, this property called?
    Irreversible
  • All matters is made up of ?
    Particles
  • The particles are tightly packed together in regular pattern, with the same amount os space between particle. What is this ?
    Solid
  • Burning wood is example of .... reaction.
    Chemical Reaction
  • Most materials can change from one form to another when they are heated or cooled. it called ?
    Change of states
  • A ..... describe what a substance or material is like, or how it behave.
    Property
  • The particles of solid can not move at all. True or False.
    False
  • SUbstances to make glass?
    Sand, Soda Ash & limestone
  • Oxygen is a substances that is a ...
    Gas
  • Example of solid water ?
    Ice
  • It is a solid, the particles is very tiny so it behave like liquid, we called it ?
    Powder
  • Example of liquid water ?
    Water
  • Example of gas water ?
    Gas, Oxygen
  • Salt and water are example of ?
    Substance / Pure
  • The substances does not change into a different substance. It called ?
    Physical reaction
  • Example of Powder? 3
    Salt, Sugar Sand, Flour, etc.
  • The ice cream will melt because of ?
    High Temperature/ Heat
  • Two factor causes rust?
    Air/Oxygen & Water
  • The opposite of solidifiying is ?
    Melting
    • Your experience on this site will be improved by allowing cookies.