Which of the following is FALSE?
a. blue main sequence stars are less luminous than red main sequence stars
b. blue stars are hotter than red stars brown dwarfs do not have nuclear reactions in their cores
c. main sequence stars with masses of 0.1 solar masses are less luminous than the Sun M type
d. main sequence stars will live longer than 10 billion years

Which statement describes why the us forest service is important a-it protects ecosystems, supervises public access of lands, and manages wilderness areas. b-it supervises public access of lands, manages wilderness areas, and enforces federal wildlife laws. c- it manages wilderness areas, enforces federal wildlife laws, and foreign governments with international conservation efforts. d- it enforces federal wildlife laws, foreign governments with international conservation efforts, and protects ecosystems.

Ateam of researchers calculates that a glacier will melt completely away in the next 100 years. which land structure will most likely be left behind after the glacier melts?

The african continent is home of the worlds largest desert and longest river . t or f