| Name: ______________________________ | Date: ______________ |
Instructions
- Explore how neurons send signals and how scientists study brain activity.
- Use the clues to connect thoughts, movement, and waves.
- Answer in complete ideas when a question asks you to explain.
Example: A neuron receives a signal and passes it to another neuron across a tiny gap. What is this communication system called?
Answer: Neural communication
Part 1: Brain Signal Basics
Complete each sentence with the best science word.
1. The specialized cells that send messages through the nervous system are called __________.
2. The tiny gap between two communicating neurons is called a __________.
3. The brain and spinal cord make up the __________ nervous system.
4. A message traveling along a neuron is an electrical __________.
Part 2: Thoughts and Movement
Choose the answer that best explains each situation.
5. Which brain region is most involved in planning and controlling voluntary movement?
| ○ A. Motor cortex | ○ B. Stomach |
| ○ C. Eardrum | ○ D. Rib cage |
6. What usually happens first when you decide to raise your hand?
| ○ A. Your brain sends signals to muscles | ○ B. Your bones make a sound |
| ○ C. Your skin produces light | ○ D. Your lungs stop working |
7. Why can a quick message help you move away from something hot?
| ○ A. It allows a rapid response | ○ B. It changes your eye color |
| ○ C. It turns muscles into bones | ○ D. It removes all pain forever |
8. Which body system carries signals between the brain and the rest of the body?
| ○ A. Nervous system | ○ B. Digestive system |
| ○ C. Skeletal system | ○ D. Respiratory system |
Part 3: Wave Watch
Write True or False for each statement.
9. Brain activity includes patterns of electrical activity that can be measured. True / False
10. An EEG records every private thought as an exact sentence. True / False
11. A wave with a higher frequency has more cycles in the same amount of time. True / False
12. Brain waves are exactly the same as ocean waves. True / False
13. Different activities, such as sleeping and paying attention, can be linked with different brain activity patterns. True / False
Part 4: Signal Scientists
Match each science term with its best description.
| 14. | Neuron | __________ | A. A brain area involved in voluntary movement |
| 15. | EEG | __________ | B. A cell that sends and receives nervous-system signals |
| 16. | Synapse | __________ | C. The number of wave cycles in a given time |
| 17. | Frequency | __________ | D. A test that measures electrical activity from the scalp |
| 18. | Motor cortex | __________ | E. A tiny junction where neurons communicate |
Part 5: Explain the Connection (optional challenge)
Answer each question using one or two clear sentences.
19. How can a thought lead to movement? |
20. What does an EEG tell scientists about the brain? |
21. Why should we avoid saying that an EEG reads a person's exact thoughts? |
22. How are brain waves similar to other waves, and how are they different? |
Answer Key
| 1. | neurons |
| 2. | synapse |
| 3. | central |
| 4. | impulse |
| 5. | A (Motor cortex) |
| 6. | A (Your brain sends signals to muscles) |
| 7. | A (It allows a rapid response) |
| 8. | A (Nervous system) |
| 9. | True |
| 10. | False |
| 11. | True |
| 12. | False |
| 13. | True |
| 14. | B (A cell that sends and receives nervous-system signals) |
| 15. | D (A test that measures electrical activity from the scalp) |
| 16. | E (A tiny junction where neurons communicate) |
| 17. | C (The number of wave cycles in a given time) |
| 18. | A (A brain area involved in voluntary movement) |
| 19. | The brain creates a pattern of activity and sends signals through neurons to muscles, causing them to contract. |
| 20. | An EEG shows patterns of electrical activity measured from sensors placed on the scalp. |
| 21. | An EEG measures broad electrical patterns, not the exact words or private details of a person's thoughts. |
| 22. | Both can show repeating patterns and frequency, but brain waves are patterns of electrical activity in the brain rather than waves traveling across water. |