8. A Journey through States of Water

What is the main subject of Chapter 8?

• The water cycle
• Journey through States of Water
• How to make lemonade
• Properties of steel plates
• Ocean currents

According to the Thirukkural quote, what will happen if it does not rain well?

• The ocean will become cleaner
• The mighty ocean will be drained
• Rivers will flow faster
• Ice will melt faster
• Water will evaporate slower

What do Aavi and Thirav enjoy on a summer afternoon?

• Ice cream
• Shikanji (lemonade)
• Cold water
• Juice
• Tea

What does Thirav initially wonder about?

• The nature of ice and water
• How to make more lemonade
• Why the sun is hot
• Where rain comes from
• How refrigerators work

Thirav's initial view is that ice and water are different because:

• Ice is colder
• Ice is hard and can be held, water cannot
• Water is transparent
• Ice floats on water
• Water has no shape

Aavi's counterview is that ice and water are:

• Completely different
• The same substances
• Made of different materials
• Found in different places
• Have different colours

How can you test if water and ice are the same substance?

• By tasting them
• By putting water in a freezer
• By mixing them with lemonade
• By looking at their colour
• By weighing them

In Activity 8.1, what happens when an ice cube is left in a cup on a table?

• It gets colder
• It melts into water
• It disappears
• It becomes steam
• It changes colour

The different forms of water are also called:

• Types
• States
• Phases
• Shapes
• Elements

Which of these is a difference between water and ice mentioned in the text?

• Water is blue, ice is white
• Water flows, ice does not
• Ice is wet, water is dry
• Water is heavy, ice is light
• Ice is a gas, water is a liquid