Which kinds of details should be used to help support a central idea? Select the two correct answers.(1 point)
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hey
Hello! How can I assist you today?
I'm in 4th grade, and I've been wondering...what happens to magma when it's heated?
When magma is heated, it can undergo several changes. Here's what happens to magma when it is heated:
1. Melting: Magma is already in a partially molten state, but further heating can cause the solid particles within the magma to fully melt, turning it into a more liquid form.
2. Expansion: Heat causes magma to expand because the particles move more energetically and occupy more space. This expansion can lead to volcanic eruptions when the pressure becomes too great.
3. Gas Release: Heating magma allows dissolved gases, such as water vapor, carbon dioxide, and sulfur dioxide, to be released. These gases can contribute to the explosive nature of volcanic eruptions.
4. Crystallization: As magma cools down, either due to temperature changes or losing heat to its surroundings, the molten minerals within it start to solidify and form crystals. The specific minerals that crystallize depend on the composition of the magma.
Overall, heating magma plays a crucial role in the formation and behavior of volcanoes.
interesting! what about when it cooled?
When magma cools down, several changes occur. Here's what happens to magma when it cools:
1. Solidification: As magma loses heat, the molten minerals within it start to solidify and form solid rock. This process is called solidification or crystallization. The specific minerals that form depend on the composition of the magma.
2. Crystal Formation: As the magma cools, the atoms within the molten minerals arrange themselves in an orderly pattern, forming crystals. The size and shape of the crystals depend on the rate of cooling. Slow cooling allows larger crystals to form, while rapid cooling results in smaller crystals or even an amorphous (non-crystalline) texture.
3. Texture Formation: The rate of cooling also affects the texture of the resulting rock. Slow cooling, as seen in intrusive igneous rocks that form beneath the Earth's surface, allows time for larger crystals to form, resulting in a coarse-grained texture. Rapid cooling, as seen in extrusive igneous rocks that form at or near the Earth's surface, leads to a fine-grained or even glassy texture.
4. Formation of Different Igneous Rocks: Depending on the composition of the magma and the cooling rate, various types of igneous rocks can form. Some examples include granite, basalt, and obsidian. The specific rocks that form provide insights into the conditions and processes that occurred during the cooling of the magma.
These processes of cooling and solidification of magma are responsible for the formation of igneous rocks, which can be found in various geological settings around the world.