Sophia rides her bike to and from school. Sophia's bike has a special tape that reflects energy from the sun to make it easier for cars to see her. She also uses a bell to let other bikers know if she is going to move past them. Which of the following forms of energy does Sophia NOT use when biking? 1.mechanical energy
2.sound energy
3.light energy
4.electrical energy

Choose one of these concerns and write a short paragraph about its impact on africa. what has caused this problem to occur, and how has it impacted people who live there?

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

Toward the end of the roman empire, what caused a decrease in the use of coined money tell me now