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Science
The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.
203,801 Questions
Why the density of rocks increase with depth?
According to the Law of Superposition, in an undisturbed column of rock layers, the oldest layers are at the bottom, the youngest at the top. Logically, there must be a first layer, without which the succeeding layer would not rest. Deposits of sediments that appear in sedimentary rock are laid down over long periods of time and often appear layered, like the pages of a book that starts at a certain time and goes back further in time with each page.
Why do science fiction films portray the future in a negative way?
Science fiction films often portray the future in a negative way for several reasons. One reason is to explore potential consequences of current societal trends or technological advancements. By showing dystopian futures, filmmakers can caution audiences about the dangers of unchecked power, environmental degradation, or social inequality. Additionally, negative portrayals can create tension and drama in storytelling, engaging viewers by presenting challenges for characters to overcome. Ultimately, these bleak visions of the future can serve as a reflection of contemporary anxieties and a call to action for positive change.
That depends, a banana on the tree is still growing and therefore technically still a living thing. A banana off the tree is severed from its life source and is therefore dead
What makes up a plant cell wall?
Composition of Cell Wall:
The major Carbohydrates making up the primary (budding) plant cell wall are cellulose, hemicellulose and pectin. The cellulose microfibrils are linked through hemicellulosic chains to form the cellulose-hemicellulose web, which is fixed in the pectin matrix. The most common hemicellulose in the primary cell wall is xyloglucan. In grass cell walls, xyloglucan and pectin are sometimes partially replaced by glucuronarabinoxylan.The outer part of the primary cell wall of the plant epidermis is usually impregnated with cutin and wax, forming a permeability barrier known as the plant cuticle.
Secondary cell walls contain a wide range of other compounds that modify their mechanical properties and permeability. The major polymers that make up wood (largely secondary cell walls) include cellulose (35 to 50%), xylan (20 to 35%) and lignin (10 to 25%). The walls of cork cells in the bark of trees are impregnated with suberin, and suberin also forms the permeability barrier in primary roots known as the Casparian strip. Secondary walls - especially in grasses - may also contain microscopic silica crystals, which may strengthen the wall. These silica crystals also ensure the survival of plant by saving them from getting grazed by herbivores.
All these compounds working in coordination make the cell wall unbreakable.
Cell Walls in Fungi:
Fungal cell walls are made of chitin, the same material from which exoskeletons of insects are made, it is a polymer of glucosamine.
Cell Walls in Diatoms:
Diatomic cell walls are composed of Silicic Acid which is a compound of silicon, oxygen and hydrogen.
Bacterial Cell Walls:
In Eubacteria, cell walls are of peptidoglycan. In archaeobacteria, A variety of compounds make up cell wall for example Glycoproteins, Psuedopeptidoglycan and Polysaccharides.
Check out the related links to see microscopic structure of Cell Wall.
What country is in the 59 degrees north and 18 degrees east?
A set of coordinates defines a single point, so it's not possible for
a whole country to be there.
Those coordinates describe a single point on the coast of Norway,
about 68 miles southwest of Oslo.
What unit does a sunshine recorder measure in?
A sunshine recorder typically measures the duration of sunshine or sunlight exposure over a period of time. The unit of measurement for this duration is usually hours per day, which indicates the number of hours during which the sun's rays are directly hitting the recorder's surface. This information is important for various applications such as meteorology, agriculture, and solar energy studies.
Is wood a nonmetallic mineral resource?
No, wood is not considered a nonmetallic mineral resource. Wood is derived from trees, which are living organisms and not classified as minerals. Nonmetallic mineral resources include materials like sand, gravel, limestone, and gypsum.
Is spilling bleach on jeans a chemical change and why?
It is a chemical change because the change of the color involve a chemical reaction.
Is combing hair a physical change?
Oh, dude, combing your hair is totally a physical change! I mean, you're literally rearranging the strands of your hair with a comb, so yeah, it's not like your hair magically grows longer or changes color just because you ran a comb through it. It's like giving your hair a little makeover without any magical potions or spells, just good ol' combing action.
What some non examples of erosion?
non-examples of erosion would be fire or anything that does not have to do with water
ice and Nanon.
What are 4 cyclic events that are natural in earth science?
Season - summer, winter, spring, autumn, rainfall
Day and Night
Phases of Moon
Tides Rise and fall
Why taproots are used more often than the fibrous?
Taproots have one long main root that goes deep into the soil and anchors it down. It can suck up more water than fibrous roots, which are a tangled mass that looks like Davy Jones's tentacles. Therefore, the taproot plants will be more ripe since they can get more water, which is why we eat them more. :9
What global winds affect North Carolina?
North Carolina is affected by the prevailing westerlies, which blow from west to east in the mid-latitudes. Additionally, the state can experience the effects of tropical easterly winds from the Caribbean during hurricane season. These wind patterns influence weather systems and climate in North Carolina throughout the year.
What is the movement of cock is called in English?
Well, darling, the movement of a rooster is called a "cock-a-doodle-doo." It's as simple and straightforward as that. No need to beat around the bush with fancy words when you can just call it like it is.
What is it called when solid melts into a liquid?
You have answered the question for yourself. It is called 'MELTING'.
Solid to liquid = melting
liquid to gas = boiling
Solid to gas = sublimation.
Gas to liquid = condensation
Liquid to solid = freezing.
The question seems to be cut off, but if you are asking about the material of an object, it depends on what specific object you are referring to. Materials can vary widely depending on the application and properties required. Common materials include metals like steel or aluminum, plastics such as polyethylene or polycarbonate, and natural materials like wood or stone. The choice of material is crucial in determining the object's strength, durability, weight, and other characteristics.
What is the name for the bits of ash and dust put into the air by certain kinds of diesel engines?
The name for the bits of ash and dust put into the air by certain kinds of diesel engines is "particulate matter." These particles are small in size and can have harmful effects on human health and the environment. Particulate matter emissions from diesel engines can be reduced through the use of filters and other emission control technologies.
What is a non reflective surface?
A lot of surfaces are non-reflective if viewed on a small scale, bricks for example. They do not reflect an image like a mirror does. However, almost all surfaces reflect light (otherwise you wouldn't be able to see them). It's more to do with colour really. A black surface does not reflect light. It absorbs it, unless it's very shiny like a car body. in which case it reflects it like a mirror.
Answer: Wood alcohol is also called methanol, methyl alcohol, Carbinol, wood naptha or wood spirits. It's used as an antifreeze, solvent, fuel and as a denaturant for ethyl alcohol. It's also used for producing biodiesel via transesterification reaction. It can also be used [on occasion] to clean wounds, but is painful.
WARNING: Do NOT under ANY circumstances drink isoprpyl alcohol. A drop will cost you the loss of your sight, and any more than that will definitely kill you.
(Just thought I should add that in there, in case anyone gets the idea of drinking it - it has happened before.)
Which parts of the electric kettle are made of good insulators of heat?
The outer part as the part you hold the kettle from to prevent injures.
What is the dark ring on a microscope?
The dark ring on a microscope is known as the field diaphragm. It is located below the stage of the microscope and is used to control the amount of light that reaches the specimen. By adjusting the field diaphragm, you can change the brightness and contrast of the image being viewed under the microscope. Proper adjustment of the field diaphragm is essential for achieving optimal image quality and clarity during microscopy.
Is greaseproof paper opaque or transparent?
Well, honey, greaseproof paper is opaque. You can't see through that stuff even if you squint real hard. It's like trying to see through a brick wall - not gonna happen.
It really just depends, if its 67 degress C then that cold for sure. But in my opinion that is cold.
