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Fourth Grade (Grade 4) Nervous and Endocrine Systems Questions

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Grade 4 Nervous and Endocrine Systems
The spinal cord is the largest bundle of nerves connected to the brain.
  1. True
  2. False
Grade 4 Nervous and Endocrine Systems
The                takes care of things your body does automatically.
  1. brain stem
  2. brain center
  3. nucleus
  4. heart
Grade 4 Nervous and Endocrine Systems
Sight, hearing, taste, touch, and smell are senses that help animals detect                in their environment.
  1. changes
  2. senses
  3. weather
  4. food
Grade 4 Nervous and Endocrine Systems
Light enters our eyes through an opening called the                .
  1. Sclera
  2. Pupil
  3. Retina
  4. Iris
Grade 4 Nervous and Endocrine Systems
The pupil adjusts to the amount of light by expanding and contracting.
  1. True
  2. False
Grade 4 Nervous and Endocrine Systems
One ability an organism has to learn about the environment is called a                .
  1. Thrive
  2. Organism
  3. Survive
  4. Sense
Grade 4 Nervous and Endocrine Systems
The lining of the cells in the back of the eye is the            retina          .
Grade 4 Nervous and Endocrine Systems
Which part of the ear passes vibrations to the middle ear?
  1. eardrum
  2. inner ear
  3. outer ear
  4. nerve cells
Grade 4 Nervous and Endocrine Systems
Where are sound waves changed into electrical signals that travel to your brain?
  1. eardrum
  2. hammer
  3. cochlea
  4. stirrup
Grade 4 Nervous and Endocrine Systems
The cornea is not the outer layer of the eye.
  1. True
  2. False
Grade 4 Nervous and Endocrine Systems
The               optic nerve               picks up the messages from the          retina          and sends them to the brain.
Grade 4 Nervous and Endocrine Systems
The           iris          is the muscular structure that opens and closes the pupil.
Grade 4 Nervous and Endocrine Systems
Your nervous system contains more than 10 billion nerve cells.
  1. True
  2. False
Grade 4 Nervous and Endocrine Systems
Which body system tells you when to reach for and catch a falling book?
  1. muscular
  2. skeletal
  3. nervous
  4. respiratory
Grade 4 Nervous and Endocrine Systems
The brain is an                 that is part of your nervous system.
  1. organ
  2. leg
  3. cell
  4. system
Grade 4 Nervous and Endocrine Systems
What is the effect of the inner ear's vibration?
  1. The inner ear's walls are lined with hairs.
  2. Vibrations pass through middle ear bones.
  3. Nerve cells send sound signals to the brain.
  4. The outer ear collects and guides sound waves.
Grade 4 Nervous and Endocrine Systems
Your brain interprets signals from                                    as sounds.
  1. eardrums
  2. three bones in the middle ear
  3. tiny hairs that affect nerve cells
  4. inner ears
Grade 4 Nervous and Endocrine Systems
Use the key below to color the parts of the human eye.

Eye Diagram

A) Muscles - orange

B) Cornea - white

C) Pupil - black

D) Lens - gray

E) Iris - green

F) Retina - brown

G) Optic nerve - red
Grade 4 Nervous and Endocrine Systems
When the lens focuses light rays on the retina, an upside down image is formed.
  1. True
  2. False
Grade 4 Nervous and Endocrine Systems
There are approximately 120,000,000 rods and 7,000,000 cones in the retina.
  1. True
  2. False
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