Page 67 - CT&AI_CLasa_7_Part_1

The World of Metals

4 and Non-metals

computational thinking quest

Tick ( ) the correct option.
1. A student designs an experiment to test 3. Which statement best generalises the
heat conduction using a metal spoon and a difference between metals and non-metals?
wooden spoon in hot water. Which conclusion (Abstract Thinking)
correctly reflects the logical outcome? (a) Metals are always hard and
(Abstract Thinking) non-metals are always soft.

(a) Both spoons conduct heat equally.
(b) Metals are always solids.

(b) Wood conducts heat better than
(c) Non-metals are always gases.
metal.
(d) Metals conduct heat and electricity,
(c) Metal conducts heat faster than
while non-metals do not conduct
wood.
heat and electricity.
(d) Neither of the spoons conducts 4. Observe the table:
heat. Material Bulb Glows Sound on Dropping
Copper Yes Ringing
2. Rohan is helping design a new cooking pan. Iron Yes Ringing
He observes that metals like aluminium and Coal No Dull
copper are used for cooking, but the handles X Yes Ringing
are made of wood or plastic. He also notices
that metals heat up quickly, while wood Identify the material 'X':
does not. (Pattern Recognition)
Which concept best explains why metals are (a) Rubber (b) Plastic
used for making the body of the utensil? (c) Aluminium (d) Wood
(Abstract Thinking)
5. A student observes the following properties of
(a) Colour
a material:
(b) Heat conductivity • It is shiny and hard.

(c) Shape • It can be drawn into wires.
• It produces a ringing sound when struck.
(d) Cost
• It allows electricity to pass through it.

The World of Metals and Non-metals 65