What do scientists need to do before humans head into mars?

Use the dictionary entry for crude to answer the question crude use context clues to choose the sentence that best uses the fourth definition of the word crude. crude ['krüd) adj from latin crudus 1. the quality of being unchanged from the original state 2. the quality of being primitive or uncultured 3. the quality of being obvious 4. the quality of being rough in execution rather than being subtle, selma was rather crude in the way she conducted herself at the meeting. elijah and his brother quickly built a crude shelter that would keep them warm and dry through the night. thelma's knowledge of art and poetry showed the rest of the diners that she was far from crude. there was oil to be found on the property, but it was crude and would need to be processed. mark this and return save and exit next submit

Which verb or verb phrase signals an inappropriate shift in mood. a) will you let b) should first change c) must attend d) will be served

Write an explanation for how to perform some kind of physical activity, such as riding a bike or playing a sport. the explanation should be geared toward someone who has never performed the activity. be sure to explain the steps in the process clearly, organize your ideas appropriately, use text features