Which of these events happens first in earth’s polar regions? a. the dense water sinks. c. water molecules move closer together. b. the water travels as a deep current. d. cold air chills water molecules.

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

Which is an accurate description of the physical characteristics of poland? its fertile soil is found only along riverbanks, and its mountainous region in the northwest has few mineral resources. it is mostly flat with fertile soil except in the east and northeast, and the mountainous region in the south has large deposits of coal and copper. it is covered with thick forests, and it has large reserves of coal, petroleum, and natural gas. its landscape is dominated by plateaus, mountains, and high ridges, and it has large deposits of sulfur and copper in the northeast.

Which of the following describes the relationship between elements of an ecosystem