Question

collecting lava
the scientists carefully hike across steamy kilauea. when they find a pool of red - hot lava, they hook some with a special hammer. they place the hot blob in a bucket of water. it sizzles and cools. the liquid lava turns into a solid rock. it is shiny and black.
this scientist carefully collects lava
what does the author describe on this page? complete the sentence.
the author describes how the scientists change lava into
hot steam
cool water
hard rock

Explanation:

The text clearly states "The liquid lava turns into a solid rock." So the author describes the transformation of lava into hard rock.

Answer:

hard rock