Q: A pulley is a simple machine that consists of a grooved wheel and? Choices: - a battery - a wedge - a lever - a rope A:
a rope

Q: Cyanobacteria are bluish green in color because they contain what? Choices: - chloroplasts - microbial - carbonate - chlorophyll A:
chlorophyll

Q: In what kind of bond does one atom contribute both of the electrons in the shared pair? Choices: - a valence bond - a metallic bond - an ionic bond - a covalent bond A:
a covalent bond

Q: Generally speaking, electronegativity values ______ from left to right across a row in the periodic table and _______ down a column. Choices: - reverse, descend - move, fall - decrease, increase - increase, decrease A:
increase, decrease