Select all the correct answers.
Which statements are true of a white dwarf?
It has a red shell.
It is the result of the core collapse of a low-mass star that sheds its outer layers.
It emits massive amounts of light compared with other stars.
It strongly attracts all matter or energy that comes near it.
It cools down to become a black dwarf.

Which is a possible result of higher air temperatures caused by global warming? a. increase in sea level b. freezing of polar ice caps c. rapid evaporation of water in the soil d. flooding of low-lying coastal areas

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.

Trade routes emerged along which coast when arab and indian traders from around the indian ocean mixed with the bantu people from africa's interior? a. swahili coast b. guinea coast c. drakensberg coast d. namib coast