Which of the following is true about radio waves?
A. Radio waves can carry energy through the vacuum of space but not through matter.
B. Radio waves can carry energy through both matter and the vacuum of space.
C. Radio waves can carry energy through matter but not through the vacuum of space.
D. Radio waves carry energy through neither matter nor the vacuum of space.

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a. precipitation b. erosion c. migration d. condensation

What percentage of light hits earth's surface directly?

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.