Q: Almost all energy at earth's surface comes from where? Choices: - another sun - oceans - wind - the sun A:
the sun

Q: What broad group of animals - which includes rats, dogs and camels - have highly developed brains and often perform work for humans? Choices: - arachnids - reptiles - amphibians - mammals A:
mammals

Q: Q: Instead of using their nose, reptiles can use what organ to smell scents? Choices: - bladder - eye - liver - tongue A:
A: tongue

Question: Q: What is the sum of the masses of the atoms in a molecule? Choices: - compound mass - mass effect - atomic energy - molecular mass A:
Answer: molecular mass

*Question*
Q: Enthalpy is a measure of the total energy of what kind of system? Choices: - macroscopic - planetary - hypodermic - thermodynamic A:
**Answer**
thermodynamic

Q: Q: As temperature increases, the solubility of the majority of solid substances does what? Choices: - stays the same - reduces - mutates - increases A:
A: increases