Answer:
1.Atria push blood into the ventricles
2.Venticles push blood out of the heart.
Answer:
The statement is True
Explanation:
The statement;
Weathering is an example of an external force of change
is TRUE.
Weathering refers to the chemical and physical processes which alter the characteristics of rocks on or near the earth's crust
Answer:
The domestication of animals helped contribute to the development of permanent settlements because some animals could help locate were there is food.
The animals need food in order to survive and so do humans, so wherever the animals went to eat they saw that they could eat the similar things.
Explanation:
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A stationary front is depicted in the picture at L. A stationary from is a narrow zone separating two air masses in which neither air mass is displacing the other. When this occurs there is a stall in the motion of the front. The blue triangles point away from the cold air and the red semicircles point away from the warm air.