Amber, which is made from hardened tree resin, is a gem. Although amber is often used in jewelry, it is not a mineral. Which statement explains why amber is not a mineral? A) Its not valuable
B) it is not a solid
C) It is not inorganic
D) It is not natural

Which direction does the energy flow in this energy pyramid ?

What material did the moon come from?

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2