What do you call the accent often seen on words like "baño" in spanish?
This accent is called a tilde, and used to change the pronunciation on words in spanish.
How many key(s) (signatures) can you make out of both major and minor scales?
There are 12 major scales, therefore 12 major keys, and there are 12 minor scales, therefore 12 minor keys. Together, that makes 24 different key signatures you can play in.
What are lava and magma and how are they related?
Magma is made of molten rock under the Earth's crust. Lava is magma found at the surface of volcano vents. Magma turns into lava when is no longer under pressure, becoming thinner, and in the open air.