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15 questions
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  • Q1

    A kind of changes in matter that does not involve a chemical reaction.

    matter

    evaporation

    physical change

    chemical change

    30s
  • Q2

    Changes in matter when it becomes new ordifferent matter is called?

    chemical change

    physical change

    freezing

    matter changes

    30s
  • Q3

    A process of changing from a solid to a gas without passing through a liquid  phase.

     

    sublimation

    freezing

    condensation

    evaporation

    30s
  • Q4

    It is the effect ofundesirable changes in our surroundings that have harmful effects on plants, animals and human beings.

     

    secondaty pullutant

    primary pullutant

    pullutants

    pollution

    30s
  • Q5

     When a substance undergoes a _____________ , it is changed into a differentsubstance with different properties.

    matter

    melting

    chemical  change

    physical change

    30s
  • Q6

    This occurs at any temperature between themelting point and the boiling point.

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    Jumble
    30s
  • Q7

    It is the change of a gas or vapor to a liquid,either by cooling it or by subjecting the substance to an increase in pressure.

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    Jumble
    30s
  • Q8

    A change in a substance from a solid to a liquid state by heating it to the melting point is called?

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    Jumble
    30s
  • Q9

    A change in a substance from a liquid to a solid state by cooling it to the freezing point is called?

    Users re-arrange answers into correct order
    Jumble
    30s
  • Q10

    Anything like  solid, liquid or gas that cause pollution is called?

    Users re-arrange answers into correct order
    Jumble
    30s
  • Q11

    It happens when a toxic subtances enter in the bodies of water that can harm  aquatic organisms.

    Users enter free text
    Type an Answer
    30s
  • Q12

    It occurs due to the presence of undesirable solid or gaseous particles in the air in quantitiesthat are harmful to human health and environment.

    Users enter free text
    Type an Answer
    30s
  • Q13

    Too much freezing and melting deforms plastic wares and other household materials.

    true
    false
    True or False
    30s
  • Q14

    Global warming made acid pollution that can cause harm to our environment.

    false
    true
    True or False
    30s
  • Q15

    Condensation is important in transforming watervapor to droplets water stored in clouds.

    true
    false
    True or False
    30s

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