Kerala Board Solutions for Chapter: Water, Exercise 8: Let us assess
Kerala Board Science Solutions for Exercise - Kerala Board Solutions for Chapter: Water, Exercise 8: Let us assess
Attempt the free practice questions on Chapter 5: Water, Exercise 8: Let us assess with hints and solutions to strengthen your understanding. Science for Class 8 - Part 2 solutions are prepared by Experienced Embibe Experts.
Questions from Kerala Board Solutions for Chapter: Water, Exercise 8: Let us assess with Hints & Solutions
each of coconut oil and water is taken in two beakers and kept in the freezer.
What do you infer from the observation?
each of coconut oil and water is taken in two beakers and kept in the freezer.
When water is frozen in glass bottles, it is advised not to fill the bottles completely. Explain the reason.
What is surface tension?
Soap decreases the surface tension of water.
How does the decrease in surface tension benefit washing of clothes?
Surface tension tends to minimise the surface area of a liquid. Suggest an experiment to prove this. (Follow the pattern: Required materials, procedure, expected observation).
Providing excess food for fish in an aquarium is a threat to its survival. Justify.
Some substances when, dissolved in water cause, the hardness of the water.
Which of the following substances, cause hardness of water?
Sodium chloride, calcium bicarbonate, calcium carbonate, calcium sulphate, magnesium sulphate, calcium chloride, magnesium carbonate.
Some substances when, dissolved in water cause, the hardness of the water.
Sodium chloride, calcium bicarbonate, calcium carbonate, calcium sulphate, magnesium sulphate, calcium chloride, magnesium carbonate.
Is the hardness due to which of the above salts cannot be removed by boiling?
