EASY (IER) KANJI - JLPT 4 KYUU

Think of it as sparks coming from a person

1) ka, 2) hi - fire, light

花火 hana bi - fireworks [note how the hi becomes a bi]
火花 hi bana - sparks [sometimes you can reverse kanji and get a different meaning - note here how the hana becomes bana]
火山 ka zan - volcano [lit. fire mountain]
火曜日 ka you bi - Tuesday