Use the information in the passage to answer these two questions. 1. Why are astronomical units not commonly used to measure distances outside the solar system?
2. Why are light-years not usually used for distances within the solar system?

1. units smaller then light years, or astronomical units are too small to be used outside of the solar system. It’s hard to comprehend how far 10000000000000000000000000000000 kilometers or miles is.

2. Light years are usually not used for distances within the Solar System because the solar system is too small to use light years. There would be a lot of decimals.

what are the answer choices?

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.