Muscles & Skeleton
Eyes
Brain
100

Name three joints in your body. 

Examples: knee, ankle, elbow, wrist, neck, etc. 

100

What is the colored part of your eye called?

Iris

100

What are the cords in our body that connect your senses and body parts to your brain?

Nerves

200

Why do we need bones?

To give our body structure!

200

What is the black part of your eye called, and what is it really?

Pupil, hole

200

How does your brain get information about its surroundings?

From your senses!

300

What would happen if you had no tendons?

You could not move your joints!

300

If you were in a place with no light whatsoever, would you be able to see?

No! Your eyes need light in order to see!

300

Why does it take some time for you to react to something you see (like catching a ruler!)?

It takes time for your brain to send a signal to the rest of your body. 
400

What are the "strings" in our body called that allow us to move?

Tendons

400

What happens to your pupil when you go from darkness to light, and why?

Pupil contracts to let in less light. 

400

Explain what happens in your body to allow you to catch something (like a ruler). Use the word senses, brain, and nerves in your explanation. 

Senses send a signal to your brain, which signals your body on what to do using your nerves. 

500

Explain how your finger is able to move. Include the words muscle, bone, and tendon in your answer. 

Muscle is attached to a tendon which attaches to bone. When we contract our muscle, the tendon pulls on the bone, making it move. 

500

Explain why nocturnal animals are better at seeing in the dark than humans. 

Their pupils are much larger and let in more light!

500

Why does your brain sometimes get tricked by illusions?

It needs to make a decision based on what your're seeing, and sometimes those decisions are wrong!