What is the temperature of earths layers?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

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