I am learning about the simple machines and force and motion.

A tropical rainforest biome is found in the Earth’s equatorial zone, where the climate is hot and humid throughout the year. They are characterized by high rainfall, typically exceeding 80 inches annually, and constant temperatures averaging around 77°F (25°C). Plants of tropical rainforests have developed unique adaptations to survive and reproduce in those conditions. Adaptations to Shed Excess Water Due to constant rain, plants in the tropical rainforest have developed some mechanisms to prevent waterlogging....

Viruses and bacteria are microscopic organisms. They may not be visible by naked eyes, but millions of them surround us all. Viruses are an assembly of different molecules containing genetic material. Most biologists do not consider them living, as they need to enter a host cell to survive and reproduce. However, they are also quite selective about their hosts. Bacteria are the smallest and simplest microbes with a free-floating genetic material....

Lightning is an electric current that passes between two clouds, within a single cloud itself, and between the cloud and earth. Lightning strikes are common during thunderstorms. They can travel large distances and follow a zig-zag path. How Does Lightning Form How Does Lightning Form There is a lot of motion within a cloud made up of water vapor. The upper layers of the cloud are in contact with the cold atmosphere....

Definition: What is Archimedean Spiral? If a line rotates in a plane about one of its ends and, at the same time, if a point moves along the line in one direction, then the curve traced out by the moving point is called a spiral. If the point is moving with a constant speed along the line that rotates with constant angular velocity, then the spiral traced by the point is called Archimedean Spiral....

Definition: What is the Carnot Engine? The Carnot engine is an analytical engine that operates on a reversible thermodynamic cycle. It gives the maximum possible efficiency that a heat engine can possess. In a thermodynamic cycle, a system is taken through several stages before returning to its starting initial stage. During this process, the system exchanges heat with the surroundings and perform work. The surroundings consist of two reservoirs, one hot and another cold, that can store a vast amount of heat....

Cells in eukaryotes need to communicate in a coordinated way to function correctly. For that purpose, cells must receive and process signals coming from their neighbors, integrate the information they receive, and transfer them to their targets for necessary action. Sometimes cells can also signal through direct contact. In contrast, single-celled prokaryotes use sensors in their body for signaling and for navigating to their food source. Thus, cell signaling and communication describe the ability of cells to respond to stimuli from their environment producing cellular responses....

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Non-vascular plants are plants devoid of a vascular system consisting of xylem and phloem. They are also devoid of roots, shoots, and leaves and grow from spores. However, some non-vascular plants possess specialized tissues to conduct water and minerals within the plant body. They include two distinctly related groups: Bryophytes and green algae . They typically appear as small, green mats of vegetation found in damp marshy areas. Despite the prevalence of vascular plants, more than 17,000 species of bryophytes exist on Earth that including mosses, hornworts, and liverworts....

Peroxisomes, previously known as microbodies, are tiny, vesicular, single membrane-bound cell organelles in the cytoplasm of all eukaryotic cells, including plants and animals. They contain various oxidative enzymes that help to produce hydrogen peroxide (H 2 O 2 ), which are subsequently removed by peroxisomes as they are toxic to the cell. Peroxisome In 1967, Belgian cytologist Christian de Duve discovered peroxisomes. Duve and his co-workers identified several oxidases within peroxisomes that are found to produce H 2 O 2 and catalase that decompose H 2 O 2 into oxygen and water....

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Regarding the section titled “Applications of Photometry in Various Fields” – Artists rely on Photometric Value Scales to judge the appropriate amount of light reflectance in various areas of their painted subject. While not necessarily a scientific application, the values were derived from photometry studies, suggesting that art is another “Application of Phtometry…”.

What is Pollination in Plants The primary goal of every living organism on earth is reproduction. In flowering plants, the flower is the main reproductive organ. They have seeds within them that contain their genetic information. Reproduction starts when the genetic information is transferred from the male part of a flower to its female part. This process produces seeds that later give rise to a new plant. The act of transferring pollen from the anther, the male part of a flower, to the stigma, the female part, is called pollination....

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What is St. Elmo’s Fire St. Elmo’s fire is defined as a phenomenon occurring in the weather when coronal discharge from a pointed object gives rise to luminous plasma. It takes place in the presence of a strong electric field in the atmosphere such as that created by an erupting volcano or a thunderstorm. In the field of electricity, the ionization of a fluid or gas encompassing a charged conductor causes an electrical discharge, better known as a corona discharge....

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Vascular plants (from Latin word ‘vasculum’ meaning duct), also known as tracheophytes (from Greek word ‘trachea’, a duct or tube), are land plants containing specialized vascular conducting tissues. They are found almost everywhere on earth. Common examples of vascular plants include trees, shrubs, grasses, flowering plants, and ferns. The first vascular plants evolved during the mid-Silurian period, about 410 million years ago. They probably evolved from moss-like bryophyte ancestors. Characteristics Presence of Vascular Tissues The main characteristics of vascular plants are the presence of two different vascular tissues – xylem and phloem....

Our understanding of cells dates back to the discovery of the microscope, which led to the formulation of the cell theory. Cell Theory in Timeline Cell discovery began in the 1600s when a Dutch shopkeeper, Antony van Leeuwenhoek , discovered simple lenses and used them to visualize single-celled organisms, which he collectively termed ‘animalcules.’ The discovery of a compound optical microscope by Hans and Zacharias Janssen in 1590 made it even easier to observe and study cells....

Solve the given worksheets to test and improve your knowledge of diffusion. Suitable for: Grade 7, Grade 8 Diffusion Worksheet Download PDF Activity on Diffusion Download PDF Diffusion Worksheet with Answers Download PDF How can Diffusion be Observed Worksheet Download PDF Diffusion Coloring Worksheet Download PDF Diffusion Review Worksheet Download PDF Fill your E-mail Address Popular Articles

A Faraday cage is a covering or mesh-like structure made of a conducting material that shields anything placed inside it from the effect of electric fields. They cannot annul static or slowly varying magnetic fields. However, if the conductor is significantly thick, then they can protect their interiors from external electromagnetic radiation to a large extent. In case the cage is a mesh, the diameter of the holes should be much smaller than the wavelength of the radiation to display the said property....