Download App

Matter in Our Surroundings — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings3 Marks
Question
Why do solids are generally denser than liquids and gases?
✓

Answer

Density of a substance is given by a formula Density $=\frac{\text{Mass}}{\text{Volume}}$ In case of solids the molecules are tightly packed and hence large mass is concentrated in very small volume. Hence their density is more. But in case of liquids and gases, their molecules have intermolecular space and hence they don’t have large mass concentrated in small volume. So the density of solids is generally more than that of the liquids and gases.

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 3 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

What is the difference between parenchyma and collenchyma?
→
Which of the two, balanced forces or unbalanced forces, can change the shape of an object? Give an example to illustrate your answer.
→
Draw the graph for uniform retardation -
a. position-time graph
b. velocity time graph
c. Acceleration- time graph
→
Define the following terms:
Cell, prokaryotic cell, eukaryotic cell, organelle.
→
How is bacterial cell different from onion pell?
→
Write the help of a labelled diagram describe the structure of a chloroplast.
→
What is the advantage of using insect resistant varieties?
→
What do you rnean by hygroscopic water and combined water in the soil? Are these available to plants?
→
A device called oscillator is used to send waves along a stretched string. The string is $20\ cm$ long, and four complete waves fit along its length when the oscillator vibrates $30$ times per second. For the waves on the string:
  1. What is their wavelength?
  2. What is their frequency?
  3. What is their speed?
→
If you are provided with some vegetables to cook. You generally add salt into the vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this?
→