From Tadpole to Frog (Part 2)

What You'll Learn

Photosynthesis converts light energy into chemical energy stored in glucose. Plants use carbon dioxide from the air and water from the soil, releasing oxygen as a byproduct.

Key Words

vertebrate
invertebrate
species

Materials Needed

cups
water
plastic wrap
ruler

Safety First

Do not look directly at the sun or bright lights.
Clean up spills immediately to prevent slipping.

Steps

Step 1 — Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 — Do

Compare the skeletal structures of a bird wing, human arm, and whale flipper using diagrams. Identify homologous bones and write what this tells us about common ancestry.

Step 3 — Observe

Observe what happens and describe it in detail.

Step 4 — Record

Record your observations in your science journal with measurements and descriptions.

Check Your Understanding

Question 1

1 of 3

Which is NOT a characteristic of all living things?