Download App

Matter in Our Surroundings — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings2 Marks
Question
What is evaporation? State the various factors which affect evaporation.
✓

Answer

The process of a liquid changing into vapour (or gas) even below its boiling point is called evaporation. The factors affecting rate of evaporation are:
  1. Temperature.
  2. Surface area.
  3. Humidity.
  4. Wind speed.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Que-Ans (Each of 2 Mark )" from Matter in Our Surroundings→Matter in Our Surroundings — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Define manure. What are different manures and how do they affect the soil?
→

What are weeds?

→

Explain why, big boulders can be moved easily by flood.

→

What are the effects of air pollution on human beings?

→

Which type of skeletal tissue contain chondrin and ossein respectively?

→
The valencies (or charges) of some of the ions are given below:
Ion
Valency(Charges)
Ion
Valency(Charge)
Sodium ion
1+
 Nitrate ion
1-
Copper ion
2+
Sulphide ion
2-
Using this information, write down the formulae of:
  1. Sodium sulphide.
  2. Copper nitrate.
→
Name the process associated with the following:
A drop of ink placed on the surface of water contained in a glass spreads throughout the water.
→
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5cm, calculate the speed of the tip of the seconds’ hand of the clock. $\Big(\text{Given}\pi=\frac{22}{7}\Big).$
→

Explain how sound travels in the form of density variations in a medium.

→
A ball hits a wall horizontally at 6.0ms-1. It rebounds horizontally at 4.4ms-1. The ball is in contact with the wall for 0.040s. What is the acceleration of the ball?
→