Group the Rocks

Group rocks by size, weight, texture, or color, and explain the rule.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 15

Scientists group rocks to learn about them. We can group rocks by size, by color, by how they feel, or by weight.
These rocks are grouped by color: gray rocks in Group 1, red rocks in Group 2.
The same rocks could be grouped another way, by how they feel: smooth rocks and bumpy rocks!
To compare weight, use a balance scale. The heavier side goes down. A bigger rock isn't always heavier!
Try it with a grown-up! Sort a pile of rocks two different ways. Can you explain your rule?

Georgia Standards of Excellence in Science:

SKE2.b — Construct an argument supported by evidence for how rocks can be grouped by physical attributes (size, weight, texture, color).