Options:
- A. Acoustics
- B. Ecology
- C. Ichthyology
- D. None of these
View Answer
B. Ecology
Everyday Science
Echo is a ___________ of sound?
Options:
- A. Reflection
- B. Refraction
- C. Interference
- D. None
View Answer
A. Reflection
Primary cosmic rays are composed largely of very fast__________?
Options:
- A. Protons
- B. Neutrons
- C. Electrons
- D. Gamma rays
View Answer
A. Protons
When we sleeps blood pressure_____________?
Options:
- A. Increases
- B. Decreases
- C. Remain constant
- D. None of these
View Answer
B. Decreases
Most of the ozone in the atmosphere is concentrated in the____________?
Options:
- A. Mesosphere
- B. Troposphere
- C. Stratosphere
- D. Ionosphere
View Answer
C. Stratosphere
Why are soft drink made with chilled water rather than water at room temperature?
Options:
- A. Ingredients dissolve better in chilled water
- B. Chilled water enhances the taste
- C. Chilled water attracts more carbon dioxide
- D. Chilled water is more hygienic
View Answer
C. Chilled water attracts more carbon dioxide
Units of electricity consumed by 2500 watt air-conditioner in one hour are_________?
Options:
- A. 25 units
- B. 2.25 units
- C. 2.5 units
- D. 0.25 units
View Answer
C. 2.5 units
The scientific study of insects is known as _______?
Options:
- A. Ichthyology
- B. Entomology
- C. Zoology
- D. Botany
View Answer
B. Entomology
There is no connection of supernova explosion with___________?
Options:
- A. Cosmic rays
- B. Pulsars
- C. The formation of heavy elements
- D. Quasars
View Answer
D. Quasars
The Sun produces most of its energy by_____________?
Options:
- A. Nuclear fusion
- B. nuclear fission
- C. Burning hydrogen
- D. None of these
View Answer
A. Nuclear fusion