The answer of how it is convert is the sun generates energy
by slowly contracting in size; converting gravitational potential energy into
thermal energy and this is called gravitational contraction. Gravitational collapse is the narrowing of an
astronomical object due to the effect of its own gravity, which tends to draw
matter inward toward the center of gravity.
In the earths mantle the convection currents pass through the mantle which then causes friction in the tectonic plates causing earthquakes,volcanoes or tsunamis
Answer:
Explanation:
Two landforms that can isolate and protect a civilization are mountain ranges and seas. Mountain ranges block invaders as they are hard to ascend and require invades to find a detour, thus prolonging the invasion. The sea is another barrier because the sea can be dangerous and so vast that people can get easily lost.
Hope that helps!
Answer:
(b) Decompression melting , flux melting
Explanation:
Decompression melting : The procedure of decompression melting includes the upward development of the earth mantle to a zone of lower pressure. The decrease in overlying weight empowers the stone to melt, prompting magma arrangement. Magma is shaped by the melting of the earth mantle.
Flux melting :I n molten petrology and volcano logy, flux melting happens when water and other unstable segments are added to hot strong shake. In designing and metallurgy, transition is a substance, for example, salt, that creates a low dissolving point blend with a metal oxide.
Similarly, the expansion of water and other unstable mixes to rocks made out of silicate minerals brings down the softening temperature of those stones.
A full circle shares a value of 360°... one angel we know is 140° and the other is 90° so we can make an equation like: 140+90+a=360. the answer would be 130°
