Determine whether each activity has a mainly positive or mainly negative effect on the environment. burning fossil fuels, recycling glass and plastic, planting trees and shrubs, venting methane into air from landfills, fracking in unstable soil

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2