Kidneys and the Excretory System (Part 2)

What You'll Learn

Eyes detect light using the retina, which contains rod cells (for dim light) and cone cells (for color). The lens focuses light onto the retina, creating an image the brain interprets.

Key Words

stomach
bone
organ

Materials Needed

cups
different scented items
textured objects
timer

Safety First

Tie back long hair before starting the experiment.

Steps

Step 1 — Read

Read and learn: Eyes detect light using the retina, which contains rod cells (for dim light) and cone cells (for color). The lens focuses light onto the retina, creating an image the brain interprets.

Step 2 — Do

Build your model using the materials provided.

Step 3 — Observe

Draw a picture of what you observe.

Step 4 — Record

Answer the questions based on your data.

Check Your Understanding

Question 1

1 of 3

What are the five basic tastes?