CBSE Class 8 Science Particulate Nature of Matter (Class 8 NCERT New) Quiz 7

1. Plasma exists in extremely high temperatures and environments with electrically charged gases. In which of the following can plasma probably exist?

A A In a light bulb B B In a flame C C In a vacuum D D Ionosphere, in the auroral displays

2. A particular sample has the following characteristics: The particles move very quickly, randomly, and have great spaces in between. They move and occupy the space of the container. Which of the following samples fit the description above?

A A Water B B Helium in a balloon. C C Ice D D Mercury

3. Which of the following statements is true when comparing the particles of honey and sugar cubes?

A A The particles of honey are closer together than the particles of sugar cubes. B B The particles of sugar cubes are closer together than the particles of honey. C C They are the same.

4. Which of the following are examples of chemical properties of matter? I. Flammability II. Combustibility III. Density IV. Reactivity

A A I, II, III B B I, II and IV C C II, III and IV

5. A cup holds 240 grams of liquid water and 80 grams of ice. What is a reasonable mass for the water in the cup after the ice melts?

A A 240 grams B B 240 grams plus 80 grams C C 320 grams

6. Which of the following properties of copper metal is not affected by the amount of matter present?

A A Mass B B Volume C C The ductility of the copper metal.

7. In which of the following processes are the particles moving closer together?

A A Condensation of air B B Evaporation C C Melting

8. Pure iron (Fe) melts at 1535 °C. Which of the following statements below is true?

A A Iron will start to melt at 1535 °C B B Iron will start to boil at 1535 °C C C Iron will start to liquefy at 1535 °C

9. A 40 cm magnesium ribbon sample is needed for a laboratory activity. You were advised to divide the ribbon into four samples. Which of the following properties of the magnesium ribbon will stay the same after dividing it?

A A Mass B B Volume C C Density

10. Which of the following will undergo a chemical change? I. Melting of candle wax II. Burning of paper III. Shaping silver into wires IV. Rusting of metal fences V. Cooking eggs

A A I, II B B II, IV and V C C I, II, III