Spanish language Q&A Forum

Hi,

Little confused.. I read in the examples: 
Mi hijo mayor (my eldest son)
Su hermana menor (her younger sister)

How would 'my older son' (not 'eldest') (context: moving from the youngest to the middle of three sons in age) be said?

How older be different from eldest in these expressions? I know about 'el mejor' or 'el mayor', but I don't see that back here.

In an example above you say, "Ellos estan delgados". I thought SER was used to describe physical characteristics i.e. "El es alto." To say Ellos estan delgados would imply they are thin now but they didn't used to be thin. Or that they appear thin. Or am I wrong?

Can’t “vamos a continuar derecho” be used instead of recto? And aren’t carretera and autopista the same thing?

Thanks.

With the correct answer being:

She might know the truth

In another lesson the future simple also implies ´maybe/chance of´, right?

What is the difference between un, uno and algún, alguno?

I encountered the following question during an exercise at A1 level:

"Yo ______ mis manos en el agua. (I plunge my hands in the water.)"

It is my understanding that mi/mis should not be used with body parts or clothing. Could you please advise?

Thanks

Question:

Queda muy ________ arroz, no podemos hacer la paella.

Answer: poca

I understand the explanation of when to use poco/poca/pocas/pocos but I don't understand why in this circumstance it is feminine, because I thought arroz is masculine. Is 'arroz' actually feminine, or is it because 'la paella' is feminine? 

In the case of aunque preceding a hypothetical, can you give some guidance on when the present subjunctive is used as opposed to the imperfect subjunctive? 

Is there a difference between using ´en´ and ´por´.

For example ´voy a hacerlo por/en la mañana´?

Why is the answer documental not documentario?