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“We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.” ― Antoine Lavoisier, Elements of Chemistry

Monday, 20 October 2014

Particulate of Matter Worksheet

FOR ALL CP1
DO THIS WORKSHEET AS YOUR HW, DO IT IN YOUR EXERCISE BOOK.
UNDERLINE YOUR ANSWER IN PART A WITH RED PEN.
SUBMIT IT ON MONDAY, OCTOBER 27 ON MR. MARKUS DESK. 
GBU


A. Fill in the blank with correct word by choosing the following words: [17]
FAST                 MOBILE             SLIDE             CONSTANLY               IDENTICAL           CHANGED           FIXED SIZES             PARTICLES           SMALL         VIBRATE                        SOLIDS        STRONGER                         SPEEDS                           VAPOR LIQUID                 WEAKER              SPACES              CLOSER               DIFFERENT          GAS

  1. All matter consists of _________ particles. A single drop of water contains more than 30 million _______________ of water.
  2. All particles of one substance are  identical. Particles of different substances are__________
  3. The ______________ between the particles are very large, compared to the particle ____________.
  4. A single drop of water can be ____________ to water vapor that occupies a volume 1700 x greater.
  5. The particles in matter are attracted to each other with _____________ or ________________ forces. The ______________ the particles the stronger the attractive forces.
  6. Attractive forces are much stronger in solid  than in __________ or ____________since particles are much closer together.
  7. All particles of matter are _____________ in motion.
  8. Particles in solid _____________ in ____________ positions.
  9. Liquid particles exist in clumps that can ______________ or roll by each other.
  10. Particles of gas are very ___________ moving. Air particles travel at ___________ of around 45 m/s.

B. Answer Briefly...
1. Name the physical changing below, and state the process involved whether absorb heat (gain heat) or release heat (heat is out)
   a. freezing
   b. melting
   c. condensing
   d. vaporisation
2. When you take ablock of butter out the fridge, it is quite hard. However, after 15 minutes it is soft enough to spread. Explain.


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