Q: What do you call an incomplete outer shell of an atom? Choices: - helium shell - motile shell - nucleic shell - valence shell A:
valence shell

Q: Amino acid units in a protein are connected by what bonds? Choices: - acidic - covalent - ionic - peptide A:
peptide

Q: Q: What organ breaks down excess amino acids and toxins in the blood? Choices: - kidney - heart - lungs - liver A:
A: liver

Question: Q: What is the color of the powder of a mineral called? Choices: - dye - pigment - hue - streak A:
Answer: streak

*Question*
Q: Screws move objects to a higher elevation by increasing what? Choices: - velocity - torque - kinetic energy - force applied A:
**Answer**
force applied

*Question*
Q: Osteoporosis, osteoarthritis, fractures, and sprains are problems affecting what system? Choices: - digestive system - nervous system - tissues system - skeletal system A:
**Answer**
skeletal system