Food science

Activity: Popcorn

Making popcorn is a delicious way to make a science experiment.

Question: what makes popcorn pop ? Popcorn is a special variety of corn. There is water trapped inside it and when it is heated to high temperature, this water will transform into steam and make the corn pop

Material required:

  • Pyrex bowl, medium size.

  • Plate

  • Popcorn

Put some popcorn in the the bowl, put a plate on top and heat in the microwave. Stop when there’s no more 'pops' happening . Be extremely careful when taking the bowl out of the microwave it will be very hot ! Transfer the popcorn to another bowl.

Compare the popcorn before and after.

Compare the size, after it pops the popcorn takes more space, it’s bigger.

Compare the weight, using a scale.

Put them in a glass of water, does it sink or float ? Compare the color, and the texture.

Activity: Lemon volcano


  • Lemons

  • Baking soda

  • Food coloring

  • Stick

Cut the top and bottom of the lemon so it stands upright. Use a spoon to break up the inside of the lemon. Add a few drops of food coloring inside. Pour some baking soda on top the lemon then mix and poke with the stick.

Question: what happened ?

Lemons contain a lot of citric acid. The citric acid reacts with the baking soda by producing carbon dioxyde gas creating a bubbly foam.

Activity: Magic milk


  • Whole milk

  • Food coloring

  • Toothpicks

  • Dish soap

Pour milk into a dish then let your kid squeeze a few drops of food coloring in it. Ask your child to dip a toothpick in the soap then in the color. Watch the magic happen.

Question: why the colors move ?

When dish soap is dropped into milk, there is a swirl of activity of soap molecules finding and bonding with fat molecules in the milk. The colors in the milk get all mixed up.

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