Which statement BEST explains the main argument presented in paragraph 4 of The Importance of Sending People to Space? A The history of space exploration demands that humans continue to explore, regardless of the cost. B Continuing to send robots into space in place of humans will ultimately result in limited knowledge. C Sending human beings into space may be three times more expensive than sending robots, so it may not be worthwhile. D The cost of human space exploration may seem like it costs more, but it could be worth the expense.

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

Complete the statements to identify the first two steps of meiosis i. (1 ) the first and longest step of meiosis i is called i. (2)the second step of meiosis i is called i.

Explain how scientists use geologic time to determine the age of landforms.