Question

question 15 (2 points)
stars that are most likely to support an earth-like planet
a more mass, more pressure & higher temperature
b main sequence, mid - sized & stable temperature
c main sequence, high mass & stable temperature
d more mass, less pressure & higher temperature

question 16 (2 points)
fm and am are types of ______ waves that are measured in kilohertz and megahertz.
a radio
b gamma
c uv
d micro

Explanation:

Question 15

Main - sequence stars are stable. Mid - sized stars (like the Sun) have a stable temperature range. High - mass stars have shorter lifespans and more extreme conditions. Stars with more mass, more pressure, and higher temperature (option a) would have a very short lifespan and extreme radiation, not suitable for Earth - like planets. High - mass stars (option c) have shorter lifespans. Option d has incorrect pressure - mass relationship (more mass usually means more pressure).

FM (Frequency Modulation) and AM (Amplitude Modulation) are types of radio waves. Gamma waves have very high frequencies (measured in exahertz). UV (ultraviolet) has frequencies in the range of \(10^{15}\text{ Hz}\). Micro - waves have frequencies in the gigahertz range. Radio waves are measured in kilohertz and megahertz.

Answer:

B. main sequence, mid - sized & stable temperature

Question 16