Answer:
Arithmetic density
Explanation:
Physiological density calculates the amount of people per arable (of land used or suitable for growing crops) square kilometer of land. Arithmetic density is the amount of people per square kilometer of land.
Answer:
No water source is available that can be used for the production of energy from water.
Explanation:
Solar energy, energy from water, nuclear energy, geothermal energy, and wind energy are used to produce electricity on Earth. All these sources are present in large amount on earth but on Mars all sources are available except water so that energy from water can't be produced. It has low temperature of the soil so no production of geothermal energy occurs. Water and oxygen for the survival of humans are important which are not available on Mars which are the potential problems that need to be solved.
Answer:
Hukbo ng Bayan Laban sa Hapon
Explanation:
The Hukbalahap (short for Hukbo ng Bayan Laban sa Hapon, or National Armed Force against the Japanese) started as a resistance movement against the Japanese occupiers
Answer: Hot material near the core is less dense and rises, and when it cools, it becomes more dense and sinks
Explanation:
The material closer to the core gets heated, making its particles move faster and its density to decrease. Therefore, it rises from the bottom.
As that warm material gets to the surface it gets cooler due to the lack of heat influence from the core. When it becomes cool, its density grows which makes it sink back down.
Answer:
c. The downgoing slab takes along water, and that water lowers the temperature at which rock melts to allow melting in and near the slab.
Explanation:
A subduction zone occurs when one of the plates at convergent boundaries, an area where tectonic plates meet, is an oceanic lithosphere.
These oceanic plates are high in temperature on formation but as they cool, they descend into the mantle below. This descent applies pressure until water is liberated from the lowering crust. The water in turn rises into the surrounding mantle and lowers the temperature at which the rocks melt to produce magma which are partly melted rocks.
This liberation of water from the subducting crust and accompanying melting is responsible for the formation of almost all magma at subduction zones.
