Unit 4 Test

Question 1

primary Waves (Siesmic Waves)

Answer 1

Fastest seismic waves and move by compressing and expanding the ground in the direction of travel, similar to how a slinky works. They travel through solids, liquids and gassess. (LONGTITUDAL WAVES)

Question 2

Secondary Waves

Answer 2

These waves move the ground up and down or side to side, perpendicular to their direction of travel.
They travel through only SOLIDS

Question 3

Earthquakes

Answer 3

Seismic waves are primarily associate with earthquakes. By studying these waves, scientists can determine the eathquakes epicenter and measure its magnitude. By analyzing how these waves travel through different layers, we can understand what those layers are made of.

Question 4

If I were to drop a pebble into a container of water….

Answer 4

The amplitude of the waves is the height from the calm water level (equilibrium) to the crest. It indicates the amount of energy the wave carries. As the pebble hits the water, it creates an impact, displacing water and generating circular ripples that travel outward from the point of impact. These ripples are called waves.

Question 5

Explain how do astronemers use electromagnetic waves to learn more about space

Answer 5

Infared waves show characteristics of many celestial bodies, such as stars, and nebulas, and other objects that would be hidden from astronemers. They are also used in Infa-red thermal imaging where they are able to see the heat emitting from a star and its brightness.

Question 6

Explain how EM waves are used in medical application

Answer 6

Ultra-violet waves are able to perform sterilization in medical equipment. And, are able to preform in cancer treatments by destroying and damaging cancer cells. X-rays emit of ionising radiation. The radiation passes through your body and is captured on a special device to produce the image.

Question 7

Plants and EM waves

Answer 7

Plants are able to capture the chemical energy in visible light and use it to conduct photosynthesis.

Question 8

Fiber Optics

Answer 8

A way of sending infromation through thin fibers or threads. The information may be sound, pictures, or computer codes. Thei infromation travels through the fibers in the form of light. The fibers can be made of glass or plastic. WAVES: Infa red waves Visible Light

Question 9

Which statement is correct regarding the relationship between wavelength, frequency, and amplitude

Answer 9

Wavelength determines the type of radiation in the electromagnetic spectrum, while amplitude and frequency determine the energy or intensity of the radiation

Question 10

AM Radio VS FM Radio

Answer 10

AM Radio: The amplitude (strength) of the carrier wave varies in proportion to the audio signal being transmitted.AM radio has lower sound quality compared to FM. Travel long distance especially at night due to their ability to reflect off the ionosphere.

FM Radio: The frequency (rate of oscillation) of the carrier wave varies in accordance with the audio signal being transmitted.FM radio offers higher sound quality. FM signals have a shorter range compared to AM

Question 11

Sound Waves (Tell me Everything)

Answer 11

• Traveling pressure waves traveling through the air. Particle vivrate back and forth creating compression and collide to propagate sound,

Question 12

Wave intere frernce

Answer 12

2 or more waves overlap in the same region. “Superposition Principle” Yt=Y1 + Y2

Question 13

Infa red

Answer 13

Anything that is not frozen and is at absolute 0 gives off infa red

Question 14

How does UV-light make pictures

Answer 14

Molecules in an object absorb the uV light and gives off Visibe light.

Question 15

Telescopes Astronomers Use:

Answer 15

Telescopes: That detect radio waves to detect exploding stars. Infa-red telescopes to see gasses in galaxies far away.