Watch out for that magma!
Rocks formed by the crystallization of magma on the Earth's surface are extrusive rocks.
Your question is a sentence and contains the phrase "feature article." (The above is another example of using the phrase in a sentence.)
Some parrots can repeat an entire sentence
The phrase "Achilles' heel" is a way of naming a weakness. An example of a sentence using the phrase would be: While he was a fantastic Basketball player, free throws were his Achilles' heel.
Magma is heated rock within the Earth's crust. When magma reaches the surface, it is called lava.
"The magma from the great volcano completely annihilated all in the settlement below."
The mixture of water and salt is a homogeneous mixture. This is an example using the phrase homogeneous mixture.
The solar and wind energy are renewable resources. This is an example using the phrase renewable resources.
He could not draw a conclusion on the basis of conversation. This is an example using the phrase draw a conclusion.
Yes, when using "as needed" as an adverbial phrase in a sentence, you do not need commas unless the phrase interrupts the flow of the sentence. For example, "Medication should be taken as needed for pain relief."
The podiatrist gave me inserts to wear in my shoes.
This is an example of a sentence using the word breakfast.