A student records the feather colors and beak shapes of every bird observation in a park. Which kind of data is the student recording? A. Qualitative
B. Empirical
C. Theoretical
D. Quantitative

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.

How can one make a supersaturated solution? (apex)

Light waves can move through , but they travel fastest when they move through a(n) .