A tectonic plates boundary where two plates move towards each other.i f two plates are of equal density they push up against each other and thus form a mountain,and if they are of unequal density then they will form a subduction zone
Angola came under the Soviet Union.
Answer: The balloon floats due to the difference in density
Explanation:
The air inside the balloon is warm as a result of it being heated. As warm air spreads out more, it has a lower density than cooler air.
A substance with a lower density rises over substances with higher densities as those sink lower. With the air in the balloon having a lower density, it will rise above the air outside which is colder and has a higher density.
Without water humans cannot survive and humans need to use only the necessary for conserve water
