*Question*
Q: What is the greek word meaning "to help make things easier"? Choices: - toy - battery - mode - machine A:
**Answer**
machine

*Question*
Q: This sharing of electrons produces what is known as a covalent bond. covalent bonds are ~20 to 50 times stronger than what? Choices: - Mendelian systems - Newton's third law - gravitational pull - van der waals interactions A:
**Answer**
van der waals interactions

*Question*
Q: Salt hydrolysis is a reaction in which one of the ions from a salt reacts with what? Choices: - proteins - fat - air - water A:
**Answer**
water

*Question*
Q: What do ocean mollusks use to absorb oxygen from the water? Choices: - shells - scales - pores - gills A:
**Answer**
gills