What Would Happen If You Didn't Sleep? — B1-B2 Interactive English Lesson
Video lesson + interactive tasks about sleep deprivation, why sleep is essential, and what happens to the brain and body without it.
Glossary: Key Vocabulary
STAGE 1
Before watching, review the words that will help you understand the video.
- sleep deprivation — the state of not getting enough sleep for a period of time
- non-REM sleep — a stage of sleep when the body becomes calm and repairs itself
- adenosine — a chemical that builds up in the brain and makes you feel sleepy
- melatonin — a hormone that signals the brain it is time to sleep
- sleep pressure — the increasing biological urge to sleep
- glymphatic system — a network in the brain that removes waste during sleep
- cerebrospinal fluid — a clear liquid that surrounds and protects the brain
- DNA repair — the process in which cells fix damage in their DNA
- inflammation — a reaction of the body to injury or illness
- Fatal Familial Insomnia — a rare inherited disease that makes sleep impossible
Prediction: What Is the Video About?
STAGE 2
Using the new words, choose the most likely topic of the video.
1) What will the video most likely explain?
First Watch: Listening for Gist
STAGE 3
Watch the video once. Do not pause the video. Focus on the general idea.
1) Choose the best summary of the video.
Second Watch: Listening for Details
STAGE 4
Watch the video again. Focus on details. You may pause if necessary.
True / False
1) Randy Gardner stayed awake for 264 hours during the experiment.
2) On the second day without sleep, Gardner's eyes became sharper and more focused.
3) Sleep deprivation can affect learning, memory, mood, and reaction time.
4) Adults usually need only four to five hours of sleep a night.
5) The glymphatic system is more active during sleep and helps clear waste from the brain.
Multiple Choice
1) Why do we start to feel sleepy?
2) What does caffeine do in the brain?
3) What happens during non-REM sleep?
4) What is Fatal Familial Insomnia?
5) Why can long-term sleep loss cause serious problems?
Vocabulary Practice
STAGE 5
Match Words and Pictures
TASK 1
Tap a word, then tap an image. Listen and pronounce.
Match Words and Definitions
TASK 2
Tap a word, then tap the correct definition. Scroll the definition list if needed.
Fill in the Gaps
TASK 3
Tap a word, then tap a gap. Wrong answers won't be placed. Tap a filled gap to clear it.
Spelling Challenge
TASK 4
Build the English words from letters. No repeats until all words are practiced.
Final Vocabulary Test
STAGE 6
Complete the final test. Navigate with buttons.