Available Answers

1. 1.

   Fill in the blank boxes to identify the states of matter.

   

2. 2.

   Multiple Choice Questions (MCQs)

   1. Which of these is made up of molecules?
      1. Solid
      2. Liquid
      3. Gas
      4. All of these
   2. The space between the molecules of which of these is the highest?
      1. Solid
      2. Liquid
      3. Gas
      4. Same in all of these
   3. The attraction between molecules of which of these is the highest?
      1. Solid
      2. Liquid
      3. Gas
      4. Same in all of these
   4. By which method can you separate a solid soluble in a liquid from the liquid?
      1. Sedimentation
      2. Decantation
      3. Filtration
      4. None of these
   5. Which of these statements is true at night in a coastal area?
      1. Wind blows from sea to land.
      2. Air above the sea is cooler than air above land.
      3. Air above the sea is warmer than air above land.
      4. Air above both land and sea is equally warm.
   6. Which of these can remove warm air from a room?
      1. Ventilator
      2. Exhaust fan placed high up in a room
      3. Chimney
      4. All of these
3. 3.

   Name these.

   1. Solid, liquid and gas are the three.
   2. Their molecules are packed together very closely.
   3. Their molecules are totally free to move around.
   4. They can flow but have a definite volume.
   5. The gas forms three-fourths of air by volume.
   6. Winds that blow over India and bring rain.
4. 4.

   Put √ for true, and Χ for false.

   1. Molecules of all liquids are the same.
   2. Atoms are made up of molecules.
   3. Molecules in a solid are closer to each other than molecules in a liquid or gas.
   4. A solid takes the shape of the container it is placed in.
   5. A heavy insoluble solid, when mixed with a liquid, will form a sediment in the liquid.
   6. The main gases present in air are oxygen and carbon dioxide.
5. 5.

   What is matter? What is it made up of?
6. 6.

   How is the arrangement of molecules in ice different from their arrangement in water?