Identify the one statement that is incorrect?
all but one of the following statement about the melting and crystallization of magmas is correct.identify the one statement that is incorrect.
1)the presence of water decreases the melting temperature of magma.
2)the upper part of magma in a magma chamber will be richer in felsic minerals than mafic minerals.
3)sodium rich felspar melts at lower temperatures than calcium rich feldspar .
4)the residue in a magma chamber will become progressively rich in felsic mineral as magma migrates away.
5)mafic magma crystallize at higher temperatures than felsic magmas.
plz help i need the correct answer.thanks
posting it again so now one knows your cheating DOESNT WORK!!!!!
To identify the incorrect statement about the melting and crystallization of magmas, we need to examine each statement and determine if it is accurate or not.
1) The presence of water decreases the melting temperature of magma.
This statement is true. Water can lower the melting temperature of magma by acting as a flux, which facilitates the breakdown of bonds between minerals and allows them to melt at lower temperatures.
2) The upper part of magma in a magma chamber will be richer in felsic minerals than mafic minerals.
This statement is generally true. Magma chambers often exhibit fractional crystallization, where the first minerals to crystallize are typically mafic minerals (such as olivine and pyroxene), leaving the remaining melt with a higher proportion of felsic minerals (such as quartz and feldspar).
3) Sodium-rich feldspar melts at lower temperatures than calcium-rich feldspar.
This statement is true. Different minerals within a magma have different melting points. Sodium-rich feldspar (such as albite) melts at lower temperatures compared to calcium-rich feldspar (such as anorthite).
4) The residue in a magma chamber will become progressively rich in felsic minerals as magma migrates away.
This statement is true. As magma migrates away from the magma chamber, the remaining residue becomes more enriched in felsic minerals. This is because the earlier-formed minerals have already crystallized and settled out, leaving a higher proportion of felsic minerals in the remaining melt.
5) Mafic magma crystallizes at higher temperatures than felsic magmas.
This statement is incorrect. Mafic magmas, which have a higher content of magnesium and iron, tend to crystallize at lower temperatures compared to felsic magmas. This is because mafic minerals have lower melting points and can crystallize at higher temperatures.
Therefore, the incorrect statement is:
5) Mafic magma crystallizes at higher temperatures than felsic magmas.