meaning that you renegotiate your premiums at the end of the term (generally 15 or 20 years). Do not let yourself be persuaded to take whole life insurance.
As far as the amount of coverage, how much will it take for your family to survive if you or your husband should die before your children are old enough to care for themselves. Include home pay off (which the longer you live and continue to pay, the net profit gained over the years grows), long term/chronic medical issues, replacement of salaries, funeral expenses etc. Don’t be surprised if this number reaches a million… What ever this number is, this is the amount of coverage you need to apply for.
Here is a calculator so that you can figure out what a yearly premium would be.