Download App

Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound3 Marks
Question
Explain how, bats use ultrasound to catch the prey.
✓

Answer

Bats emit high frequency ultrasonic squeaks while flying and listen to the echoes produced by the reflection of their squeaks from their prey. From the time taken by the echo to be heard, bats can judge the distance of the prey in their path and catch it.

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 Sound→Sound — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Why cannot a sound heard on the moon? How do astronauts talk to one another on the surface of moon?
→
A stone is thrown vertically upward with an initial velocity of 40m/ s. Taking g = 10m/ s2, find the maximum height reached by the stone. What is the net displacement and the total distance covered by the stone?
→
A girl is wearing a pair of flat shoes. She weighs 550N. The area of contact of one shoe with the ground is 160cm2. What pressure will be exerted by the girl on the ground:
  1. If she stands on two feet?
  2. If she stands on one foot?
→
If a car travels 50m distance in 4s with a acceleration of 5m/s2, then what was its initial speed?
→
Three different atoms of oxygen are represented as:
$^{16}_{\ 8}\text{O},\ ^{17}_{\ 8}\text{O}\text{ and }^{18}_{\ 8}\text{O}$
  1. What do the subscripts (lower figures) and superscripts (upper figures) represent?
  2. What factor is responsible for the change in the superscripts 16, 17 and 18, though the element is the same?
  3. What is the usual name for such atoms of an element?
  4. Give the nuclear composition of $​​^{18}_{\ 8}\text{O}$
→
How much drinking water is required daily for a cow?
→
What are the functions of bones, cartilages, ligaments and tendons?
→
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment.
→
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water?
→

What will happen if:

  1. Ligament gets over stretched?
  2. Heparin is absent in blood.
  3. Striated muscles contract rapidly for longer duration.
→