Grade 4 hard worksheet on senses, the brain, and body systems working together. Students answer multiple-choice questions about running, smelling food, reflexes, and the brain's role in interpreting sense signals. Fill-in items use Grade 4 science vocabulary like optic nerve, muscular system, and circulatory system to show how body systems cooperate during everyday actions. This Grade 4 worksheet supports classroom practice and homework.
Style:
Body Systems and Senses
Part A: Multiple Choice
Circle the best answer for each question.
1. Which body systems work together when you run after a ball?
A) Only the muscular system
B) Nervous, muscular, skeletal, respiratory, and circulatory systems
C) Only the digestive system
D) Only the nervous system
2. When you smell cookies and your mouth waters, which systems are working together?
A) Skeletal and muscular only
B) Nervous and digestive systems
C) Respiratory and skeletal only
D) Circulatory and skeletal only
3. Which statement about reflexes is correct in Grade 4 science?
A) Reflexes happen only after the brain finishes thinking
B) Reflexes can act through the spinal cord before the brain processes the event
C) Reflexes use only bones
D) Reflexes only happen in the ears
4. Why do scientists say the brain is the most important part of using our senses?
A) It moves bones directly
B) It interprets signals from sense organs into useful information
C) It pumps blood to the eyes
D) It produces saliva
Part B: Fill in the Blank
Write the correct answer on each line.
1. A signal from the eye travels along the optic nerve to reach the brain.
2. Your heart beats faster during exercise because the muscular system needs more oxygen.
3. When you hear a loud noise, your ears detect sound waves and send signals to the brain.
4. The circulatory system carries oxygen-rich blood from the lungs to all body cells.
5. Working together, sense organs, nerves, the brain, and muscles let the body sense, decide, and respond to the world.
Body Systems and Senses
★ Part A: Multiple Choice
Circle the best answer for each question.
1. Which body systems work together when you run after a ball?
A) Only the muscular system
B) Nervous, muscular, skeletal, respiratory, and circulatory systems
C) Only the digestive system
D) Only the nervous system
2. When you smell cookies and your mouth waters, which systems are working together?
A) Skeletal and muscular only
B) Nervous and digestive systems
C) Respiratory and skeletal only
D) Circulatory and skeletal only
3. Which statement about reflexes is correct in Grade 4 science?
A) Reflexes happen only after the brain finishes thinking
B) Reflexes can act through the spinal cord before the brain processes the event
C) Reflexes use only bones
D) Reflexes only happen in the ears
4. Why do scientists say the brain is the most important part of using our senses?
A) It moves bones directly
B) It interprets signals from sense organs into useful information
C) It pumps blood to the eyes
D) It produces saliva
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) A signal from the eye travels along the optic nerve to reach the brain.
2) Your heart beats faster during exercise because the muscular system needs more oxygen.
3) When you hear a loud noise, your ears detect sound waves and send signals to the brain.
4) The circulatory system carries oxygen-rich blood from the lungs to all body cells.
5) Working together, sense organs, nerves, the brain, and muscles let the body sense, decide, and respond to the world.
Ready to Practice?
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9 Questions
12-18 minutes
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