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A tall, deciduous tree with black markings on its white bark, the silver birch is native to the colder regions of the northern hemisphere.
Its spherical flowers produced in corymbs are quite showy; it is a popular decorative plant, thriving in humid conditions.
Honey locust is a thorny tree species that can even adapt to nutrient-poor soils. Legend has it that Christ's crown of thorns was made from this tree.
This species is an evergreen conifer with many uses. Native American Indians called it 'tree of life'. Today it is a popular ornamental plant.
Perhaps no flower is more popular as a gift. In Bulgaria, roses are grown on an industrial scale as a perfume ingredient.
Examine starch inclusions covered by Lugol’s solution with an optical microscope.
Thalloid plants do not have real organs. Let’s take a closer look at their structure.
Turning safety matches into matches that can be ignited by striking them against any surface.
In this experiment, we create a toy car that can be propelled by air or water and air.
Let's measure the capacity of the lungs using nothing but a plastic bottle, a rubber tube and a plastic bowl.
In this experiment, you will learn how to place a boiled egg into a flask with a narrower neck.
How can you drop a matchbox so that it always falls on its smallest side?
Collisions deform real cars. But why don’t they deform toy cars?
Let's see what happens when you fix two burning candles and then two bottles of water to a seesaw.
This experiment demonstrates the laws of physics behind the roly-poly.
This experiment demonstrates the laws of physics behind the wooden woodpecker.
Let’s see how you can build a gun out of a plastic tube and some basic kitchen items.
A cylindrical body and a double cone are released on a slope. What happens?
This experiment models a way to raise the Titanic to the surface with nothing but a glass of fizzy water and some raisins.
How can you make a ping-pong ball defy gravity with the help of a straw?
This experiment sets out to find the balance point of a paper strip.