When is the earth said to be at perihelion?

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Describe how ocean currents can affect a moving object ❕❕❕

The process by which liquid water changes into water vapour is called what ?