Experiments in Biology

Meaning of Biology

Biology is a natural science concerned with the study of life and living organisms including their arrangement, function, growth, development, distribution, and classification. Biology has many sub disciplines joined by five so-called axioms of modern biology. It includes botany and zoology and all their subdivisions. Hands testing are one of the best ways to know biology.

The biology experiments are designed for you to do at home or school using simple equipment. Biology experiments are popular with people of all ages. Biology is an interesting subject. You can start experiments with plants, flowers or even with the observation of insects, soil and food samples etc. Biology activities and experiments are educational, exciting, and often times great fun.

Experimentation is one of the best ways to learn about biology. By taking a hands-on learning approach, students can get a real sense of biology concepts. Here are some good ideas for lab activities and biology experiments are as follows.

Experiment: 1 Colour Flowers



it is a very simple and fun biology experiment which will teach children about water absorption systems in plants.

The things required for the experiments are

  • A cup of water
  • Food colour
  • A flower with a whole stalk
  • Empty clean flask


  1. Mix the food colour in the water. Make sure there are no lumps and that the colour dissolves completely in the water.
  2. Now pour the coloured water into the container. Make sure that the container is clean and doesn’t have any impurities on its surface.
  3. Now take the flowers and place them in the container so that half of the stalk is flooded under water.
  4. Place the container on a window shelf or any other surface that gets enough sunlight.
  5. Tell the children to observe the colour of the flowers over a period of time.

Experiment Results:

Plants need water for food this simple experiment shows how water is engaged by the stalk, and distributed throughout the plant to its leaves and flower.

Experiment: 2 Observing Bacteria

it is a simple and easy experiment to introduce the children to some variety of bacteria.

Things Required:

  • A compound microscope
  • Yogurt
  • Clean empty cup
  • Water
  • Unused ink dropper
  • Microscope slide
  • Cover slip/glass


  1. Take a small quantity of yogurt (half a teaspoon) and drop this into the cup, adding two teaspoons of water to it.
  2. Mix the yogurt and water with a spoon, so as to create a consistent delay.
  3. Using the ink dropper, place a drop of this yogurt suspension on the clean, clean microscope slide. Make sure you don’t take more than a drop.
  4. Place the cover slip on the drop of suspension. Now the slide is ready to be observed under the microscope.
  5. Now simply allow the children to observe the sample under the microscope.

Experiment Results:

Usually the commercially manufactured yogurt includes Streptococcus thermopiles and Lactobacillus bulgaricus. You can tell the children about these bacteria which are in fact helpful to our systems and not harmful like other kinds of bacteria.

Experiment: 3 Homemade Extraction of Your Own DNA


  • transparent glass
  • salt
  • liquid soap
  • grapefruit juice
  • Alcohol (e.g. rum, vodka, etc.)


The first step is of spitting on the glass and adding a pinch of salt to it. Then add some liquid soap, juice from a grapefruit, and some drops of alcohol. Once you have everything on the glass, stir the mixture and now you can see the result .The white mucous filaments you observe on top of the mixture are your DNA

Experiment: 4 Magic Balloons

To display how the gases from yeast can be used to blow up a balloon.

Required materials

  • 1 Packet of dried yeast
  • Teaspoon
  • Warm water
  • Sugar
  • Clear plastic bottle (such as a small empty soda bottle)
  • 1 or more balloons
  • Large bowl (optional)

Experiment Time

Approximately 15 minutes


  1. Pour the packet of dried yeast into the clear plastic bottle.
  2. Add some warm water to the bottle so that the bottle is about 1/4 filled.
  3. Add a teaspoon of sugar to the bottle and swirl the bottle around it.
  4. Place the balloon over the mouth of the bottle so that it’s fully covered and there are no leaks.
  5. Place the bottle with the balloon on it on a warm shelf or place it into a large bowl of warm water.


Sugar, along with vinegar, produces the best conditions for yeast to ferment.


After placing the bottle in the warm bowl of water or on the warm window sill, the balloon will magically blow itself up. By adding sugar and heat to the yeast, the yeast (which is a plant) grows and produces a gas called carbon dioxide. The carbon dioxide trapped inside the bottle rises and fills up the balloon.

Experiment: 5 Barney Bananas

Barney Banana is a fun experiment to show how to slice a banana from inside, before peeling it.

Required materials

  • Long stitching needle
  • Small banana

Experiment Time

Less than 5 minutes


  1. Carefully push the needle into one of the edges of the banana. Push it all the way in so it reaches the other side of the banana but do not push through the skin of the other side. You’ll feel a change in resistance once you hit the other side, so do this step slowly.
  2. Move the needle up and down on its turn point. This will cut and slice the banana inside.
  3. Move to another point and repeat the process. As you move to the next section keep about a finger’s space between each hole. Make sure you only put the needle in one side of the banana so you can cover the holes from friends or family.
  4. Now peel the banana for your friends or family. They’ll be shocked to find a perfectly sliced banana from the inside.

Experiment: 6 Double Colour Flower

The materials required for experiment

  • White flower with branch and leaves
  • 2 Glass tumblers
  • Blade to cut the flower stem
  • Red dye (water soluble)
  • Water

Experiment Time

Around 10 minutes to set up the equipment and 5-12 hours to see out the observations.

Experiment Procedure

  1. Fill two glasses with water.
  2. Mix red colour in one of the tumblers.
  3. Tear the stem of the white flower.
  4. Place one half of the stem in one glass and the other in the glass containing the dyed liquid.
  5. Leave the set-up undamaged for a few hours.


After a few hours one half of the flower changes its original colour.


The liquid rises through narrow columns that produce the required tube force. The tube action carries water from the beakers to the petals of the white flower causing it to change colour. It is the same phenomenon that causes water to move up plants and trees through the roots, stem, and then into the flowers and leaves.

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Comments 1

  1. Preeti wrote:

    Nice……Interesting….easy topics….wonderful..
    Thank You

    Posted 02 Oct 2015 at 3:38 pm

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