Yesterday our (11) teacher did a fun test for us. She put a white flower into a glass of water. Then she added some blue (12) to the water. We waited for one day. The next morning blue color (13) in the flower. Our teacher said the flower drinks water through its stem. I want to be a (14) some day. My teacher says a good one needs a careful eye and a lot of (15).
Many things in our home come from science. About one hundred years ago, an American man (16) the air conditioner. Before that, people slept in very hot rooms in summer. Now our rooms are (17) even in July. The (18) of these machines is not easy. Workers must be (19), and every part must be checked. Science makes our life better every day. Next time you turn one on, (20) your friends this story.