Sentence Completion

Complete the sentence with ONE word from the passage for each blank.

Sleep does more than rest the body; it is essential for memory. During the night, the brain replays the day's experiences and strengthens the connections that store new information, a process called consolidation. Studies show that students who sleep after learning tend to remember more than those who stay awake. Deep, slow-wave sleep appears especially important for locking facts into long-term storage.

The strengthening of memory during sleep is known as , and the type of sleep most important for storing facts is -wave sleep.