Describe two physical properties of matter and how those properties are measured.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Which fact represents evidence for the big bang theory?

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?