检查 

Pinyin: jiǎn chá 
Meaning：Inspection; examine
Sentence: 他把硬币倒过来，仔细检查。He reversed the coin and examined it carefully.

More: 

检： 

Pinyin: jiǎn
Meaning: To check; to examine; to inspect
Radical: 木
Stokes: 11
Traditional: 檢
Common words/Phrase: 
检测[jiǎn cè] 【to detect】
检索[jiǎn suǒ] 【searches】
检验[jiǎn yàn] 【to test】
检讨[jiǎn tǎo] 【self-criticism】
检修[jiǎn xiū] 【overhaul】

查： 

Pinyin: zhā, chá
Meaning: To search; to investigate; to inspect
Radical: 木
Stokes: 9
Traditional: 查
Common words/Phrase: 
查询[chá xún] 【to inquire】
查找[chá zhǎo] 【look up】
查阅[chá yuè] 【look up in a reference source】
查明[chá míng] 【investigate and bring out into the open】
查证[chá zhèng] 【investigate; check out】