Resources required:
Hard boiled eggs; oil (e.g. vegetable oil); food colouring (any colours); vinegar; water; cups; small bowls.

Description of investigation:
Place 1 cup of very hot water in a cup, add 3 to 4 drops of food colouring and 1 teaspoon of vinegar. Mix well. Repeat this step with other colours.
Add the eggs in each cup and let sit for about 3 minutes. Remove and set on paper towels.
In each bowl, add about 3cm of water until about half of the egg is covered. Next, add 1 tablespoon of oil to each bowl and 6 to 8 drops of food colouring.
Place one egg into each bowl. With a spoon, spoon the water/oil mixture over the egg and let sit for about 3 to 4 minutes. Then roll the egg so it turns over and let sit for another 3 to 4 minutes.
Take out the egg and lay on paper towels. Let it sit for a few minutes, then wipe off with additional paper towels.

Investigation Questions:
Predict what will happen to the egg when dipped in the vinegar solution.
Predict what will happen to the egg when dipped in the water/oil mixture.
Why does oil float on water?

Skills Acquired:
Think Critically – ask questions, investigate and find out answers.
Collaborate with family members.
Get Creative! Create different marbled eggs to represent different galaxies.
Communicate your findings with others.
You are invited to share photos or videos of your Science activity results on our social media platform – Primary Science Malta.

Suggested links to other subject areas:
Mathematics:
Measuring quantities of liquid.
Concept of time.
Language:
Understanding and following instructions precisely.
Researching info on different galaxies to determine colours used.
Creative Arts:
Creating different marbled eggs to represent different galaxies.