Q: What results when a warm air mass runs into a cold air mass? Choices: - cool front - dry front - rough front - warm front A:
warm front

(Question)
Q: What type of reaction is a process in which some substances, called reactants, change into different substances, called products? Choices: - reversible reaction - physical reaction - toxic reaction - chemical reaction A:
(Answer)
chemical reaction

Ques: Q: What is at the center of our solar system? Choices: - the moon - earth - the Kuiper Belt - the sun A:
Ans: the sun

(Q).
Q: How do bipedal creatures walk? Choices: - on twelve legs - on six legs - on four legs - on two legs A:
(A).
on two legs

Ques:Q: Compression, tension and shear refer to what type of force that can cause rock to change? Choices: - seismic force - process - gravity - stress A:

Ans:stress

Question: Q: Mushrooms are an example of what type of organism, which includes beneficial and toxic specimens? Choices: - spores - bacteria - seeds - fungi A:
Answer:
fungi