Parashat Tetzaveh – Opening Questions

What is the meaning of the words "וְנִשְׁמַע קוֹלוֹ... וְלֹא יָמוּת" which appear at the end of the section on the priestly robe and its bells?
How does the copper altar relate to the earthen altar commanded in Shemot 20?
What is the relationship between the "חֹשֶׁן" and the "אוּרִים וְהַתֻּמִּים"?
Were the Priests and Levites chosen at the same time? Was this before or after the Sin of the Golden Calf?
Why does the command to build the incense alter come after the discussion of priestly clothing and not together with the other vessels?

Parashat Tetzaveh/Questions