Which statement best describes the progress of science?
a. scientific ideas are changed when better ones are found.
b. people rarely think old scientific ideas are correct.
c. once a scientist has an idea, it can never be changed.
d. scientific ideas are hardly ever replaced with new ones.

How does friction with the atmosphere affect the speed of an artificial satellite

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.