Almost all energy on Earth came from the blank

Which of the following measures the average kinetic energy of particles? A. mass B. entropy C. enthalpy D. temperature

Which of an atom's subatomic particles are involved in chemical bonding? Select one: a. valence electrons only b. neutrons only c. protons and valence electrons only d. neutrons and protons only

What is the chemical formula for ammonium carbonate? (NH4) 2CO3 (NH4) HCO3 NH4 (CO3) 2 NH4 (CO3)

As more bulbs are connected in series in a circuit, what happens to the brightness with which each glows?

Which of the following is not a substance? 1. methanol 2. milk 3. copper 4. water

Which of the following is fact-based science rather than part of a belief system a. astrology b. paranormal investigation c. chemistry d. philosophy e. cultural rituals

Meanders form when a river flows across bedrock? true or false

Tank a contains a mixture of 10 gallons water and 5 gallons pure alcohol. tank b has 12 gallons water and 3 gallons alcohol.

Why won't water reform to an ice cube if you freeze it?

For what reasons can a theory be changed