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.
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Answer:
4. Glassy
5.phaneritic
6. Porphyritic
7. Alphanitic
Explanation:
Glassy or vitreous textures occur during some volcanic eruptions when the lava is quenched so rapidly that crystallization cannot occur. The result is a natural amorphous glass with few or no crystals. Examples include obsidian
Examples of aphanitic igneous rock include basalt, andesite and rhyolite.
Aphanitic rocks in contrast to phaneritic rocks, typically form from lava which crystallize rapidly on or near Earth's surface.
Porphyritic textures develop when conditions during cooling of a magma change relatively quickly
Explanation:
