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Egg Absorption Investigation
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Egg Absorption Investigation
📚 Part 1: Multiple Choice
1. What does "absorption" mean in this experiment?
The colour sits only on the surface of the egg
The liquid colour moves into the material of the eggshell
The egg becomes heavier because it melts
The liquid turns into a gas
2. Which is an example of a controlled variable (something you should keep the same) in this fair test?
Using different sizes of eggs for each colour
Keeping the same type of egg for every colour
Changing the amount of liquid for each cup
Leaving some eggs for 5 minutes and others for 20 minutes
3. You leave eggs in coloured water for 10 minutes and see colour on the shell. Which is the best scientific explanation?
Diffusion and absorption of the dye into the porous shell
The egg is making its own colour
The colour is caused by the egg heating up
Photosynthesis in the eggshell
4. Which liquid is most likely to change the eggshell colour more quickly?
Plain water with food colouring
Water mixed with a little vinegar and food colouring
Cooking oil with food colouring
Milk with food colouring
✏️ Part 2: Short Answers & Observations
5. Write your hypothesis (prediction). What do you expect will happen to the egg shells after 10 minutes in different coloured liquids?
6. List two variables you will control to keep the test fair (for example: same time, same amount):
7. Record your observations after 10 minutes. Describe what you saw for each colour (one or two short sentences each):
8. Draw one egg after it was in the coloured liquid. Show where the colour moved on the shell.
9. In one sentence, explain why the eggs changed colour using scientific words (use words like absorption, diffusion, porous):
10. Suggest one follow-up test you could do at home or in class to learn more (write what you would change and what you expect to find):
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