Why do you think the atomic theory changed over time? A. scientific knowledge is static and never changes

B. Scientific knowledge cannot be explored by others

C. scientific knowledge is always being tested and analyzed to see if previous ideas are still supported

D. scientific knowledge should be published immediately to prevent others from taking the idea

Which position represents spring in the southern hemisphere? a) b) c) d)

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.