Materials are O the directions for living things
O what something is made out of
O a chart that we can use to determine what traits children will have
O things that grow quickly

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