Answer the following question given this paragraph: Earth's climate has changed many times. Long warm periods were broken up by ice ages. Over the past 150 years, climate has warmed quickly. Q: What occurs between long warm climate periods? Choices: - hurricanes - mass extinction - drought - ice ages A:
ice ages
Answer the following question given this paragraph: The small intestine a is narrow tube that starts at the stomach and ends at the large intestine ( Figure above ). In adults, the small intestine is about 23 feet long. Chemical digestion takes place in the first part of the small intestine. Many enzymes and other chemicals are secreted here. The small intestine is also where most nutrients are absorbed into the blood. The later sections of the small intestines are covered with tiny projections called villi ( Figure below ). Villi contain very tiny blood vessels. Nutrients are absorbed into the blood through these tiny vessels. There are millions of villi, so, altogether, there is a very large area for absorption to take place. In fact, villi make the inner surface area of the small intestine 1,000 times larger than it would be without them. The entire inner surface area of the small intestine is about as big as a basketball court!. Q: Where does the small intestine begin? Choices: - mouth - colon - spleen - stomach A:
stomach
Q: Answer the following question given this paragraph: Sometimes air doesn't mix in the troposphere. This happens when air is cooler close to the ground than it is above. The cool air is dense, so it stays near the ground. This is called a temperature inversion ( Figure below ). An inversion can trap air pollution near the surface. Temperature inversions are more common in the winter. Can you explain why?. Q: In what season are temperature inversions more common? Choices: - spring - autumn - summer - winter A:
A: winter
Question: Answer the following question given this paragraph: By losing an electron, the sodium atom becomes a sodium ion. It now has one less electron than protons, giving it a charge of +1. Positive ions such as sodium are given the same name as the element. The chemical symbol has a plus sign to distinguish the ion from an atom of the element. The symbol for a sodium ion is Na + . Q: What happens when a sodium atom loses an electron? Choices: - becomes calcium - gains a proton - combines with hydrogen - becomes sodium ion A:
Answer: becomes sodium ion
*Question*
Answer the following question given this paragraph: In the gasoline industry, what is called isooctane is actually 2,2,4-trimethylpentane. Draw the structure of isooctane. Q: What do they call 2,2,4-trimethylpentane in the gasoline industry? Choices: - spirogyra - methane - xerophyte - isooctane A:
**Answer**
isooctane
Q: Answer the following question given this paragraph: The water is moved to tanks. The clumped solids sink to the bottom of the water. This is called sedimentation . Q: What is the term for when clumped solids sink to the bottom of the water? Choices: - Clumping - sediment - Foundation - sedimentation A:
A: sedimentation