U – 2. Which of the following is a solution?
a
A. concrete
B. sand and water
C. orange juice
D. apple juice

explanation:

detials on each model with digrams

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

20 drops hope this

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.