Quiz Class 9th Science 06-05-2026

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Do You Know

Q1. Camphor

explanation:

1. Sublimation is a process where a solid changes directly into gas without becoming liquid.
2. Some substances have this special property.
3. Camphor (kapoor) when heated, directly turns into vapour.
4. Ice and water first melt into liquid before becoming gas.

Conclusion:
Camphor is an example of sublimation.

Q2. Distance is zero

explanation:

1. Work is defined as:
   👉 Work = Force × Distance
2. If distance = 0, then:
   👉 Work = Force × 0 = 0
3. Even if force is applied, without movement, no work is done.
4. Example: pushing a wall that does not move.

Conclusion:
Work done is zero when distance is zero.

Q3. Protons

explanation:

1. Every atom has protons, neutrons, and electrons.
2. The Atomic number tells us the number of protons in the nucleus.
3. In a neutral atom:
   👉 Number of protons = number of electrons
4. Atomic number helps identify the element.

Conclusion:
Atomic number represents number of protons.

Q4. Scalar

explanation:

1. Physical quantities are of two types:
   • Scalar → only magnitude (value)
   • Vector → magnitude + direction
2. Speed tells how fast something moves.
3. It does not include direction.
4. Velocity includes direction, but speed does not.

Conclusion:
Speed is a scalar quantity.

Q5. Water

explanation:

1. Plants have special tissues for transport.
2. Xylem carries water and minerals.
3. It transports water from roots to leaves.
4. Food is transported by another tissue called phloem.

Conclusion:
Xylem transports water.