Vocabulary consisting only from characters you are able to read
探検
tanken
exploration, expeditionsuru
上る
noboru
(1)to rise, to go up, to come up, to ascend, to be raised, (2)to enter (esp. from outdoors), to come in, to go in, (3)to enter (a school), to advance to the next grade, (4)to get out (of water), t godan, jlpt3, verb, vintrans
水源
suigen
source of river, fountainheadmix
木馬
mokuba
(1)wooden horse/rocking horse/ (2)vaulting horse/horse used in gymnastics/ (3)the horse (ancient torture device that one was forced to straddle with rocks hanging from the feet) leda1
程度
teido
degree, amount, grade, standard, of the order of (following a number)mix
課程
katei
course/curriculum/(P)leda1