19. according to the first law of thermodynamics, energy:\ncan be created and destroyed\ncannot be created…

19. according to the first law of thermodynamics, energy:\ncan be created and destroyed\ncannot be created or destroyed, only transferred\nis always lost during transfer\nis constantly increasing in the universe\n\n20. how can the steepness of a slope be determined on a topographic map?\nby the color of the contour lines\nby the distance between contour lines\nby the thickness of the contour lines\nby the direction of the contour lines\n\n21. what is the appropriate response to a chemical spill in the lab?\nclean it up yourself\nignore it\nreport it immediately to the teacher\nleave the lab

19. according to the first law of thermodynamics, energy:\ncan be created and destroyed\ncannot be created or destroyed, only transferred\nis always lost during transfer\nis constantly increasing in the universe\n\n20. how can the steepness of a slope be determined on a topographic map?\nby the color of the contour lines\nby the distance between contour lines\nby the thickness of the contour lines\nby the direction of the contour lines\n\n21. what is the appropriate response to a chemical spill in the lab?\nclean it up yourself\nignore it\nreport it immediately to the teacher\nleave the lab

Answer

Answer:

  1. B. Cannot be created or destroyed, only transferred
  2. B. By the distance between contour lines
  3. C. Report it immediately to the teacher

Brief Explanations:

  1. The first - law of thermodynamics states energy conservation.
  2. Closer contour lines mean steeper slope.
  3. Safety protocol in lab for spills is to report to teacher.