How long is the fall equinox?

How long is the fall equinox? 12 hours What happens on the autumnal equinox? Autumnal equinox, two moments in the year when the Sun is exactly above the Equator and day and night are of equal length; also, either of the two points in the sky where the ecliptic (the Sun’s annual pathway) and the […]

Was attacking Pearl Harbor a mistake?

Was attacking Pearl Harbor a mistake? According to a 2016 article by retired U.S. Navy Commander Alan D. Zimm, Japanese Captain Mitsuo Fuchida, who led the aerial attack on Pearl Harbor, made a critical mistake by firing two flares, which signaled to his aviators that they had not caught the Americans by surprise. Why was […]

Is diorite volcanic or plutonic?

Is diorite volcanic or plutonic? It is produced in volcanic arcs, and in mountain building where it can occur in large volumes as batholiths in the roots of mountains (e.g. Scotland, Norway). Because it is commonly speckled black and white, it is often referred to as “salt and pepper” rock. Diorite is the plutonic equivalent […]

Why are molecular crystals soft and with low melting point?

Why are molecular crystals soft and with low melting point? Because the intermolecular interactions in a molecular solid are relatively weak compared with ionic and covalent bonds, molecular solids tend to be soft, low melting, and easily vaporized (ΔHfus and ΔHvap are low). What holds molecules together in a solid? Solids are generally held together […]

What kind of microscope can see a Tardigrades?

What kind of microscope can see a Tardigrades? Monocular Compound Microscope Can Tardigrades live in the human body? Despite their reputation, tardigrades aren’t entirely indestructible. They cannot survive the trip through the human digestive tract since our stomach acid disintegrates the flesh of the tardigrade without much trouble, so eating one wouldn’t do any harm. […]

How can you increase the kinetic energy of a substance?

How can you increase the kinetic energy of a substance? Whenever something becomes warmer, the kinetic energy of its atoms or molecules has increased. When matter gets warmer, the atoms or molecules in the matter move faster. It’s easy to increase the kinetic energy in matter. How does the kinetic energy of the molecules in […]

How are limiting factors and carrying capacity connected?

How are limiting factors and carrying capacity connected? Limiting factors regulate how many organisms live in an ecosystem. Space, food, oxygen, and water are limiting factors. The maximum population size that an ecosystem can support is called carrying capacity. Limiting factors determine carrying capacity. What are the concepts of carrying capacity and limiting factors? Carry […]

Why do insects hide?

Why do insects hide? Camouflage. Camouflage or cryptic colouration is a defence mechanism that helps insects merge with their surroundings. They do it to conceal their presence or identity, either to hoodwink their predators or to deceive their prey. Which insect has the best camouflage? Dead Leaf Mantis The incredibly convincing camouflage helps them hide […]

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