Jayzees old kettle developed a crusty white layer on the inside after years of boiling tap water (Figure 3). The white solid would not wash out, even with soap and water.

Becquerel expected to find ( he developed the photographic plate that had sun-exposed minerals on top of it. becquerel expected to find ( he developed the photographic plate that had been in the closed drawer.

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.