How are deep ocean currents produced differently than surface currents.?

Is the alien theory a scientific claim? why or why not? just took the test it was , : " the alien theory is not a scientific claim because it is not based on valid data, there is no evidence to support it, and it does not come from a reliable source."

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Blank liquids and gases exert a buoyant force on objects placed in them