Question 8 (1 point) how many protons are in an element with an atomic number of 8 and a mass number of 18? a 3 b 8 c 10 d 18

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

What causes the formation of ocean currents?