Author Question: Internal heat forces Earth's liquid core to circulate with _______________. Fill in the blank(s) ... (Read 94 times)

Evvie72 · **on:** Jul 27, 2018

Internal heat forces Earth's liquid core to circulate with _______________.

Fill in the blank(s) with correct word

Question 2

Cepheid and RR Lyrae variable stars change their brightness by ____.

a. atmospheric explosions of hydrogen gas
b. internal changes in their fusion processes
c. a combination of atmospheric explosions and internal changes
d. a combination of atmospheric explosions and physically pulsating
e. changing its period between pulses