Physical properties of water Practice exercise 3

A juice vendor in Nakuru complains that the bottled juices he prepares at home sometimes appear cloudy even though the ingredients are fresh. He uses water from a spring near his home. What could be the cause of the cloudiness and what advice would you give?  (2 marks)

A family in rural Baringo uses water from a nearby well. They notice that even after using a lot of soap, the clothes don’t get clean easily, and there’s a white residue left in their basins. Explain the likely cause of the problem and suggest a simple way they can improve the quality of the water for washing.  (2 marks)

The diagram below shows a science experiment where two beakers are being heated. One contains distilled water (Beaker A) and the other contains untreated borehole water (Beaker B). Explain why the boiling point of the water in Beaker B is higher than that in Beaker A. (2 marks)

The diagram below shows a science experiment where two beakers are being heated. One contains distilled water (Beaker A) and the other contains untreated borehole water (Beaker B). Explain why the boiling point of the water in Beaker B is higher than that in Beaker A. (2 marks)

The diagram below shows a village water tank that collects rainwater, with the outlet pipe connected to metal pipes. After a few months, villagers notice reddish-brown water and stains inside their storage containers. What could be causing this change and what should they do?  (2 marks)

The diagram below shows a village water tank that collects rainwater, with the outlet pipe connected to metal pipes. After a few months, villagers notice reddish-brown water and stains inside their storage containers. What could be causing this change and what should they do?  (2 marks)

The diagram below shows a village water tank that collects rainwater, with the outlet pipe connected to metal pipes. After a few months, villagers notice reddish-brown water and stains inside their storage containers. What could be causing this change and what should they do?  (2 marks)

A new school kitchen is being set up in Kisumu and has access to both lake water and treated tap water. The kitchen staff wants to avoid water that causes scaling in kettles and cooking pots. Which water source should they choose and why? (2 marks)

A blacksmith in Eldoret wants to create traditional metal ornaments that can be easily shaped without breaking. Which physical property of metals should he prioritize, and which metal would be most suitable for this task? Explain. (2 marks)

A cook in a hotel in Nakuru complains that one type of cooking pot takes longer to heat than another, even though they are the same size. Based on your knowledge of physical properties of metals, what might be the reason? (1 mark)

A technician is repairing an electric motor at a borehole in Garissa. He wants to replace some components that carry electric current. What two physical properties of the replacement metal must he check and why? (2 marks)

 A group of pupils at Nyeri Primary School is asked to collect materials to build a model of a solar cooker. They are given the option to use metal, plastic, or wood for the base and cooking tray. Their science teacher tells them, “Metals have properties that make them most suitable for this task.” Based on this situation, list and explain any five physical properties of metals that make them more suitable for building the solar cooker than plastic or wood. (5 marks)

The diagram below shows a water tank stand made of metal bars in Turkana. After several years of sun exposure, some parts of the stand appear bent. Which physical property of the metal is responsible for this deformation, and how could this problem be prevented in future construction?  (2 marks)