Which sentence from passage 1 provides the weakest support for the author's argument.

All of the following are examples of service-learning opportunities except: a. donating time to senior citizen war veterans and writing a report about the experience for your u. s. history class. b. getting a part-time job at a habitat restoration center. c. reading to second-grade students as part of your assigned reading time for your english class. d. planting trees in your community and then discussing global warming in your science class.

Did the universe cool off or get hotter as it expanded after the 'big bang"?

Explain how you might determine the rate of weathering on a sample rock