Answer: The Magdeburg hemispheres are a pair of large copper hemispheres, with mating rims. They were used to demonstrate the power of atmospheric pressure. When the rims were sealed with grease and the air was pumped out, the sphere contained a vacuum and could not be pulled apart by teams of horses.
Explanation:
Chemical reactions are how new forms of matter are made. While nuclear reactions also may produce new matter, nearly all the substances you encounter in daily life are the result of chemical changes. Chemical reactions help us understand the properties of matter
Is this multiple choice?!
1. Structure such as the human tailbone or appendix that evolution has reduced in size because it is no longer used = d. vestigial structure
2. study of the similarities and differences in the structures of different species:
= g. comparative anatomy
3. structure that is similar in related organisms because it was inherited from a common ancestor: = c. homologous structure
4. study of the similarities and differences in the embryos of different species: study of the similarities and differences in the embryos of different species = j. comparative embryology
5. scientist who finds and studies fossils to learn about evolution and understand the past:
= i. paleontologist
6. mistaken idea of jean baptiste lamarck that evolution occurs through the inheritance of traits that an organism develops in its own lifetime: = h. inheritance of acquired characteristics
7. process by which a single species evolves into many new species to fill available niches:
= e. adaptive radiation
8. relative ability of an organism to survive and produce fertile offspring: = k. fitness
9. structure that is similar in unrelated organisms because it evolved to do the same job, not because it was inherited from a common ancestor: = f. analogous structure
10. study of how and why plants and animals live where they do: = a. biogeography
11. process in which organisms evolve traits useful to humans because people select which individuals are allowed to reproduce and pass on their genes to successive generations:
= b. artificial selection
