please explain. im really confused about what part goes into the debit or credit and why

Required information Knowledge Check 01 On December 31, the company purchases supplies for $1,000 on credit Complete the necessary Journal entry by selecting the account names from the pull-down menus and entering dollar amounts in the debit and credit columns View transaction list Journal entry worksheet On December 31, the company purchases supplies for $1,000 on credit Note: Enter debit before credits. Data Credit General Journal Supplies Accounts payable Debit 1,000 Dec 31 1.000 Record entry Clear entry View general Journal