What is thought to have caused the extinction of the dinosaurs?

1, ice ages

2. increase in oxygen

3. asteroid that hit earth

4. rising sea levels

Which phrase is most likely to start a description of a scientific theory? “what i have found through my online research is . .” “after much thought, i believe that the best explanation is . .” “based on the observations made and experiments performed over the last fifty years . .” “if sunlight shines on the right side of a plant, then the plant will grow toward the right because . .”

Which of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an