1. A: Air is considered to be a matter.
R: Air has all the properties of matter.
2. A: We can easily move our hand in air.
R: The particles of air are very close to each other.
3. A: Light and heat are not considered as matter.
R: They don't have mass.
4. A: The particles of gases have high kinetic energy.
R: Interparticle forces for gases are very less.
5. A: Ice floats on water.
R: Density of ice is less than that of water.
Answer (1)
Let's analyze the statements one by one:
A: Air is considered to be a matter. R: Air has all the properties of matter.
Air is indeed considered to be matter because it has mass and occupies space, fulfilling the two main criteria for something to be classified as matter.
A: We can easily move our hand in air. R: The particles of air are very close to each other.
This statement is somewhat incorrect. Although we can easily move our hand through air, this is because the particles of air are actually far apart compared to liquids and solids, allowing for easy movement.
A: Light and heat are not considered as matter. R: They don't have mass.
This is true. Light and heat are forms of energy, not matter. They do not have mass and do not occupy space.
A: The particles of gases have high kinetic energy. R: Interparticle forces for gases are very less.
This is correct. Gas particles have high kinetic energy, which results in them moving quickly in all directions. The weak interparticle forces in gases allow them to spread out and fill the container they're in.
A: Ice floats on water. R: Density of ice is less than that of water.
This is accurate. Ice is less dense than liquid water because its molecular structure forms a crystalline lattice that takes up more space than the molecules in liquid water. This is why ice floats.
Overall, the statements generally reflect basic principles taught in high school level physics, particularly concerning the properties of matter and energy.
