1. Which material would be the best choice for a windowpane to allow light to pass through clearly?
a) Metal
b) Ceramic
c) Frosted glass
d) Clear glass
Answer: d) The best choice for a windowpane to allow light to pass through clearly is clear glass. Clear glass is transparent, which means it allows light to pass through without scattering or blurring it significantly.
2. Terry made tea by boiling some tea leaves in water. Which of the following methods should he use to separate the leaves from the tea?
a) Sedimentation
b) Decantation
c) Filtration
d) Evaporation
Answer: c) To separate the tea leaves from the tea, Terry should use the method of filtration. Filtration involves passing the mixture through a filter, which will trap the solid particles (tea leaves) while allowing the liquid (tea) to pass through.
3. Which material would be the best choice for a pot handle to prevent burns when cooking?
a) Metal
b) Wood
c) Plastic
d) Glass
Answer: b) The best choice for a pot handle to prevent burns when cooking would be wood. Wood is a good insulator of heat and does not conduct heat as effectively as metal, plastic, or glass.
4. What is the purpose of using filter paper or sieve in the process of filtration?
a) To trap the insoluble particles
b) To speed up the filtration process
c) To collect the soluble substances
d) To evaporate the liquid
Answer: a) The purpose of using filter paper or sieve in the process of filtration is to trap the insoluble particles present in a mixture and allow the liquid or solvent to pass through.
5. Match the following.
a) 1:B, 2:C, 3:A
b) 1:C, 2:A, 3:B
c) 1:A, 2:C, 3:B
d) 1:B, 2:A, 3:C
Answer: d) Plastic Bag: Transparent and Waterproof
Sponge: Opaque and porous
Tissue paper: Translucent and Porous
