Assuming you're talking about Sugar peas. . .
common serving units
3oz - 40 calories
1oz- 13 calories
There are about 1 calorie in a pea pod.
Pea pods do not explode as in "BAM!" They do, however, pop.
Approximately 4 pea pods.
When pea pods are plump, crisp, and they begin to harden or fade in color means peas start to ripen.
They are called "pods". Pea pods, bean pods, etc.