18 Questions
What is the fundamental characteristic of matter that is observed in everything around us?
It has both mass and volume
What did ancient Indian philosophers believe that everything was made up of?
The five basic elements - Panch Tatva
What is the classification of matter based on, according to modern day scientists?
Both physical properties and chemical nature
What was the difference in the two schools of thought regarding the nature of matter?
One believed matter was continuous, the other believed it was made up of particles
What will be discussed in subsequent chapters?
Chemical nature of matter
What is the term used to describe the amount of space occupied by an object?
Volume
What is the primary reason why a sponge can be compressed?
Because it has minute holes with trapped air
Which of the following is NOT a characteristic of the particles of a solid?
Random motion
What is the primary reason why we can smell hot sizzling food from a distance, but not cold food?
The particles of hot food are more energetic
What is the common characteristic of a chair, almonds, and lemon water?
They are all matter
Which property of matter does a diver's ability to cut through water in a swimming pool demonstrate?
Density
What is the shape of a sugar or salt crystal?
Fixed
What happens to the salt/sugar particles when it dissolves in water?
It spreads throughout the water
What is the SI unit of mass?
Kilogram (kg)
What is the purpose of Activity 1.2?
To demonstrate that particles of matter are extremely small
What is observed when potassium permanganate crystals are dissolved in water?
The solution remains coloured even after dilution
What is the purpose of Activity 1.3?
To demonstrate that particles of matter are continuously moving
What is the relationship between 1L and 1 dm3 in terms of volume?
1L is equal to 1 dm3
Explore the concept of matter being particulate or continuous through a hands-on activity. Dissolve salt or sugar in water and observe the changes. Understand what happens to the dissolved substance and how it relates to the idea that matter is made up of particles.
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