Q: What orbits an atoms' nucleus? Choices: - neutrally charged ions - positively charged protons - isotopes - negatively charged electrons A:
negatively charged electrons

(Question)
Q: Copper oxide is a result of what two substances mixing? Choices: - copper and gas - metal and oxygen - crystal and oxygen - copper and oxygen A:
(Answer)
copper and oxygen

Ques: Q: When a warm air mass becomes trapped between two cold air masses, what type of front occurs? Choices: - storm front - obscured front - stationary front - occluded front A:
Ans: occluded front

(Q).
Q: Viroids are plant pathogens much simpler than what, but like them can reproduce only within a host cell? Choices: - pests - bacteria - parasites - viruses A:
(A).
viruses

Ques:Q: Volcanoes are termed active, dormant, or extinct depending on the possibility of the presence of what in chamber structures? Choices: - coal - sulpher - water - magma A:

Ans:magma

Q: A solute generally has what effect on the boiling point of a solvent? Choices: - randomizes - lowers - none - raises A:
raises