Why does the Earth's crust stay the same size?

Gretchen wants to run a test to discover whether glass, copper, wood, or plastic conduct electricity. She sets up a circuit connecting a battery to a light bulb, with a small gap she will use to test the conductivity of the different substances.

Which elements are diatomic?

Give me two sources of air pollution

A cylinder with a moving piston expands from an initial volume of 0.250 L against an external pressure of 2.00 atm. The expansion does 288 J of work on the surroundings. What is the final volume of the cylinder? (1 LLaTeX: / cdot⋅atm = 101.

A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO4. What mass of H2O2 was dissolved if the titration required 19.8 mL of the KMnO4 solution

Which of the following compounds, when added to water, is most likely to increase the solubility of HgS? A. KNO3 B. Na2SO4 C. KCl

Evidence that best supports the theory of biological evolution was obtained from the

You may normally expect a slow reaction if a low activation energy is required.

What do 2 different neutral isotopes of the same element have in common?

Why are oceans salty