Density: Sink or Float?

What You'll Learn

Density is how much mass is packed into a given volume. Objects denser than water sink, while less dense objects float. Oil floats on water because it is less dense.

Key Words

ion
isotope
chemical bond

Materials Needed

baking soda
cups
spoons
food coloring
plastic bottles
balloons

Safety First

Keep small objects away from young children.

Steps

Step 1 — Read

Read the introduction and identify the main idea of this lesson.

Step 2 — Do

Conduct a chromatography experiment: use a coffee filter and markers to separate the pigments in different colored inks.

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

What is density?