15-Minute Quiz with Answer Key

Which statement best describes a scientific hypothesis?

Which of the following is a heterogeneous mixture?

Which property of gold is chemical rather than physical?

Which change would double the magnitude of the Coulomb potential energy between two oppositely charged particles?

A cube of HDPE has a side length of $1.20 \times 10^{-2}\ \mathrm{m}$ and a mass of $1.70 \times 10^{-3}\ \mathrm{kg}$. Will it float in seawater with density $1.03\ \mathrm{g/cm^3}$?

How many significant figures are in $3.60 \times 10^3$?

A scientific theory can be disproven by new evidence.

An extensive property can be used to identify a substance because it does not depend on the amount of sample.