Track quiz
Seven quick questions. Use the table if you get stuck.
| Lesson | The rule |
|---|---|
| Object or material | The thing, and what it is made of. |
| Hard or soft | A hard material is hard to press in or scratch. |
| See-through | Transparent: clear. Translucent: a glow. Opaque: nothing. |
| Float or sink | Heavy for its size sinks. Light for its size floats. |
| Dissolve | A dissolved solid is still there, too small to see. |
| Right material | Pick the property the job needs. |
| Shiny or dull | A shiny material has lustre. A dull material has no lustre. |
A steel spoon and a wooden spoon are side by side. What is true?
A steel file scratches a glass bangle. The bangle does not scratch the file. Which is harder?
You look through coloured glass. The picture is clear, with a little colour. What is the glass?
A big steel bowl floats. A small steel nail sinks. What decides this?
You stir salt into water until you cannot see it. Where is the salt?
Aluminium foil is shiny. An eraser is dull. Which has lustre?
Which material is best for a raincoat?
Open Chapter 6, Materials Around Us, in your NCERT book. Find these seven ideas in it.
Next: Temperature and its Measurement. Put a number on hot and cold.