Where do magnetic fields come from? The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in the Earth’s outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo. How is Earth’s magnetic […]
What is the main form of energy?
What is the main form of energy? After hundreds of years of observation and experimentation, science has classified energy into two main forms: kinetic energy and potential energy. In addition, potential energy takes several forms of its own. Kinetic energy is defined as the energy of a moving object. What is energy transferred from? Energy […]
Which of the following is a correct comparison between mitosis and meiosis?
Which of the following is a correct comparison between mitosis and meiosis? So, the correct answer is ‘Meiosis II resembles mitosis when sister chromatids split’ Which is the correct order of these mitosis events? Stages of mitosis: prophase, metaphase, anaphase, telophase. Cytokinesis typically overlaps with anaphase and/or telophase. You can remember the order of the […]
What are the three layers of soil profile?
What are the three layers of soil profile? The main layers of the soil are topsoil, subsoil and the parent rock. Each layer has its own characteristics. These features of the layer of soil play a very important role in determining the use of the soil. Soil that has developed three layers, is mature soil. […]
Does the melting point increase across a period?
Does the melting point increase across a period? Melting and boiling points increase across the three metals because of the increasing strength of their metallic bonds. The number of electrons which each atom can contribute to the delocalized “sea of electrons” increases. The atoms also get smaller and have more protons as you go from […]
What causes a comet to move?
What causes a comet to move? Long-period comets are set in motion towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars and the galactic tide. Hyperbolic comets may pass once through the inner Solar System before being flung to interstellar space. How do I track comets? How to See Comet […]
Is Iron bad for copper pipes?
Is Iron bad for copper pipes? On cold-water piping, pitting and corrosion is often caused by an excess amount of flux residue. Iron deposits from a rusty water heater can also corrode copper pipes. What pH level is toxic? Toxic effects on survival, motility, and growth decreased with increasing pH. From pH 6.9 to 9.0, […]
What are the three components of sound?
What are the three components of sound? It is received wisdom within the sonic branding business, that there are three different types, or elements, of sound. These are voice, ambience (or effects) and music. What are the basic components of sound? The basic components of a sound wave are frequency, wavelength and amplitude. What are […]
How long did 17th century plague last?
How long did 17th century plague last? Between 1563 and 1665, London experienced four plagues that each killed one fifth of the city’s inhabitants. This column uses 790,000 burial records to track the plagues that recurred across London (epidemics typically endured for six months). How long did Spanish flu last? The influenza pandemic of 1918–19, […]
Where can we find an example of a transform boundary?
Where can we find an example of a transform boundary? Transform boundaries are where two of these plates are sliding alongside each other. This causes intense earthquakes, the formation of thin linear valleys, and split river beds. The most famous example of a transform boundary is the San Andreas Fault in California. What do transform […]