Radical 禾
9 strokes
grain 禾 (126a) + fight 斗 (605a) = classification 科
This character is often used for a specialization or field of (academic) study.
科学 (82) kēxué science
[科长 (172) kēzhǎng section chief]
[科学家 (82, 109) kēxuéjiā scientist]

The farmers are having a grain fight (throwing bags of grain at each other) after the announcement of the grain classification results. / The giant breaks up the fight and imposes a curfew until morning.
鬥
ice crystals
(246a) + ten 十 (4) = fight 斗
The “cross” is rather distorted here to make room for the “ice crystals” — note that the “horizontal” line has a definite slope to it.

Two gangs of boys start throwing ice crystals at each other from either side of the cross roads — and it soon develops into a full-blown fight. / [No pronunciation needed]