1. Define matter. Is air matter?
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2. Write 3 properties of matter.
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3. Explain – “Particles of matter have space in between them”.
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4. Explain – “Particles of matter attract each other”.
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5. Define Diffusion with suitable example.
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6. Give one example of (i) diffusion in gas (ii) diffusion in soid.
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7. Give two reasons for saying that wood is a solid.
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8. Differentiate between rigid and fluid.
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9. Define sublimation with suitable example.
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10. Convert (i) 293 K to degree centigrade (ii) 27degree centigrade to Kelvin scale.
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Answers
Matter is anything which occupies space and has Mass.
Yeah air is matter as it has Mass
2) they have physical and chemical property
Have masss
Has volume
3)You will observe that there is no rise in the water level. This shows that particles of matter have spaces between them. When sugar is added to the water, the sugar the particles adjust themselves in the space between the water particles. Hence, we can say that particles of matter have space between them
4)Particles of matter attract each other. There's a force that acts on the particulate matter that keeps it together. ... This proves that attraction varies from particles of one substance to another. Cohesion means the force of attraction between the particulate matter of the same substance.
5)Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. ... For instance, a gas diffuses very quickly in another gas. An example of this is the way the noxious smell of ammonia gas spreads in air.
6)Common Examples of Diffusion. You can smell perfume because it diffuses into the air and makes its way into your nose. A teabag placed in a cup of hot water willdiffuse into the water. Placing food coloring in a liquid willdiffuse the color
7)The principle reason for saying that the wood is solid is that it is rigid. The molecules of the substances are bonded by strong force of attraction. As a result, they do not take the shape of the vessel and cannot be broken easily.
8)Rigid : Rigid means 'unbending' or inflexible. A solid is a rigid form of matter so that it maintains its shape when subjected to outside force. Fluids : Fluids are the substances which have tendency to flow. A liquid is a fluid form of matter which occupies the space of the container
9)Sublimation is a chemical process where a solid turns into a gas without going through a liquid stage. An example of sublimiation is when ice cubes shrink in the freezer.
10)273-273=0°c
273+27=290K
Hopes
Do mark as brainliest
HEY MATE:
QS: DEFINE MATTER:
ANS:
Matter is anything which occupies space.
Yes, air is a matter
REASON:
Is occupies mass and have weight.
QS:3 PROPERTIES OF MATTER:
ANS:
☆Matter is anything which has weigjt and takes up space.
☆Matter exists in 3 forms:
Solid,liquid,gas.
☆It has properties that can be described through density,solubility,conductivity etc.
QS: EXPLAIN-PARTICLES OF MATTER HAVE SPACE BETWEEN THEM:
ANS:
Let's organise an activity to clearly explain the above statement:
☆Take a 100ml beaker
☆Fill half the beaker with water and mark the level.
☆Dissolve some salt or sugar in it with a glass rod.
☆Observe any change in the water level.
CONCLUSION:
When we dissolve salt in water the particles of salt get in to the spaces of particles.