Isobar Maps

What is the standard interval or spacing between isobars? Options: 2, 4, 5, 10

Sequence of isobars: 980, 982, 984, 986, 988, 992, 994, 996, 1000, 1004, 1006, 1008, 1010, 1012, 1014, 1016, 1020. Which value is NOT accepted?

Isobars are drawn in multiples of 2 mb spacing.

Isobars must not touch other isobars.

Isobars are not allowed to return to their starting point.

Do adjacent isobars tend to parallel each other?

Isobars cannot end in the middle of the map.

Isobars can end at the edge of the map.

You should draw a 1012 isobar closer to a 1013 mb reading than a 1010 mb reading.

You only need to label every other isobar on the map.