Mantle material rises in convection currents because heated materials become less dense.
<h3>What is convection current?</h3>
- Convection is a single- or multiphase fluid movement that develops on its own as a result of the interaction between a fluid's body forces—most frequently gravity and density—and material property heterogeneity.
- Differential heating leads to convection currents. Warm, less dense, lighter material rises while cool, more dense, heavier material sinks. When a fluid's one component is heated, the difference in temperatures causes the fluid to flow in a particular direction.
- The process of a heated fluid rising and being replaced by a cooler one is known as convection cycle.
- Convection currents use the mass motion of a fluid, such as water, air, or molten rock, to move heat from one location to another. The earth's ocean currents, atmospheric weather, and geology are all controlled by convection currents' capacity to transport heat.
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Answer:
Volcanic Eruptions, Ocean Circulation, Solar Activity, and Earth Motions.
Explanation:
Answer: D. demographers
Explanation:
When planning for the future of a city, the urban planners need to ensure that the city is able to afford its current and future residents with the facilities needed to provide them with the maximum welfare possible.
To do this the urban planners should reach out to demographers. Demographers study human populations with a view to analyse and ascertain various characteristics such as size, composition, how they are distributed within a geopolitical zone and most importantly, how they will change overtime.
For urban planners to plan for a city that will take care of future residents as well, they would need to know how the kind of future residents they are planning for and this is when they will turn to demographers whose job it is to study and possibly predict future population.
Weathering refers to the main factor which impacts how soils change and horizons develop.
<h3>What is Weathering?</h3>
This is defined as the process in which rocks are broke down into smaller particles as a result of movement of materials.
It is also responsible for determining soil changes and how different horizons develop.
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Answer:
True
Explanation:
The use of shadows to determine an objects height from aerial photographs is an essential part of satellite image interpretation. The length of the shadow is used to determine the height.
Orthophoto is a type of satellite imagery that has been adjusted using special devices. This kind of imagery is correct geometrically, this means it can be used to measure actual distances One notable fact about orthophoto is the fact that the side of the images can not be seen. The use of shadows to determine an objects height can compliment the geometrically accurate photos. That makes the shadow feature of a satellite image important to orthophotography.
