Q: Sand dunes migrate when sand is blown up a slope and this force pulls it down the other side? Choices: - earthquakes - air pressure - spin - gravity A:
gravity

(Question)
Q: Co 2 , h 2 o, methane, o 3 , nitrous oxides (no and no 2 ), and chlorofluorocarbons (cfcs) are known as what type of gases? Choices: - chemical gases - hydrogen gases - carbonate gases - greenhouse gases A:
(Answer)
greenhouse gases

Ques: Q: Which metalloids are found in the nitrogen group? Choices: - polonium and antimony - selenium and antimony - sulfur and polonium - arsenic and antimony A:
Ans: arsenic and antimony

(Q).
Q: What is the opposite of rarefaction zones, where air molecules in waves are loosely packed? Choices: - molecules zones - pressure wave - measurements zones - compression zones A:
(A).
compression zones

Ques:Q: Organisms that live in freshwater environments often possess a contractile vacuole that prevents cells from taking in too much water through what process? Choices: - electrolysis - glycolysis - hemostasis - osmosis A:

Ans:osmosis

Q: Which muscles allow your fingers to also make precise movements for actions? Choices: - paired muscles - motoric muscles - fine movement muscles - intrinsic muscles A:
intrinsic muscles