What causes lightning? i need asap a. buildup of light in a cloud b. buildup of pressure in a cloud c. buildup of sound energy d. buildup of charge in a cloud

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

4.explain how these geological processes and interactions have changed earth's surface through the years. be sure to use evidence to support your answer • earthquakes • faults • ocean formation • mountains • volcanoes • island chains • seafloor spreading

The gulf stream and north atlantic current modify the climate of northwestern europe by making the climatea) warmer and drierb) warmer and more humidc) cooler and drierd) cooler and more humid