Obseravtion & Science , The Scientific Method , Science Professions.
What describes what we know about our world?
Science
What was Kepler's primary mission?
to find stars with Earth-size planets.
How to calculate frequency?
F= cycles/ time
What is the wave velocity if the wavelength is 5 cm and the frequency is 5 Hz?
25
Will sound travel faster on a humid day, when the air is full of moisture, or on a dry day?
Humid day
Which branch of science is called "central science"?
Chemistry
Who was the first to observe and describe single-celled organisms?
Antonine Van Leeuwenhoek
Define amplitude.
The distance from the center of the wave to its crest or trough.
A crest of a wave with an amplitude of 8 meters intersects the trough of another wave with an amplitude of 4 meters. What is the resulting amplitude?
4 m
Sound becomes damaging to your ears at what decibel?
120 db
What is the study of rocks, minerals and their formations?
Geology
Which British scientist coined the term "cell", as the basic unit of living things.?
Robert Hooke
Define wavelength.
The distance from one crest to the consecutive crest.
A trough of a wave with an amplitude of 10 meters intersects the trough of another wave with an amplitude of 2 meters. What is the resulting amplitude?
12 m
What type of material, reflects sound?
Hard and flat surfaces or objetcs
How much is the communication gap between Earth and Mars?
4 to 24 min
Differentiate between crest and trough.
The highest point of a wave: crest
The lowest point of a wave: trough
If the angle of incidence is 45 degrees, what will be the angle of reflection?
45 degrees
Why cannot sound travel in outer space?
Sound waves cannot travel in outer space, because there is no air in outer space.
What is the difference between science and knowledge?
Science is knowledge and technology is the application of that knowledge.
What is the difference between longitudinal and transverse waves? Give one example each.
The waves that travel perpendicular to its source is called transversal wave. Example :-light
The waves that travel parallel to its source is called longitudinal wave. Example:- sound
Write the path through which sound waves travel from outside to our brain in order of travel.
The sound waves travel from outside to
outer ear🡪 ear canal->ear drum->ossicles-🡪cochlea🡪auditory nerve->brain