Mixing Oil and Water

Mixing Oil and Water Worksheet: Mass is conserved with oil and water (Grade 4 Science, TEKS 4.6C)

Students see that oil floats on water in a layer, add the masses of the oil and water, decide that the oil still counts in the mass, and use a table to find the mass of a mixture after mixing. The page teaches the idea first, so no prior lesson is needed, and every answer is on the page.

What's Inside

• A teach box on mixtures, mass, and why oil floats in a layer, with a worked example
• Part A: jars on scales showing water plus oil and the layered mixture
• Part B: a before and after mixing table
• A raccoon guide with a hint that matches the answer key
• An answer key with answers marked in red, plus a short teacher note with what to watch for

How Teachers Use It

Read the teach box and the worked example together, then let students try Part A and Part B. It takes 8 to 10 minutes and prints clearly in black and white. The focus skill is showing that matter is conserved when oil and water are mixed, part of TEKS 4.6C: demonstrate that matter is conserved when mixtures such as soil and water or oil and water are formed.

Why It Works

Clear jar and scale pictures make the idea easy to see: add the parts, read the scale, and the numbers match. Questions are short, mostly circle or one line answers, and the reasoning is on the teacher key. Pair it with the other Grade 4 mixing sheet to cover both soil and water and oil and water.