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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
Could never be built as a physical model?
A theoretical concept or an abstract idea that cannot be physically implemented or realized due to factors such as feasibility constraints, technological limitations, or fundamental principles that prevent its construction in the physical world. This could also apply to ideas that are purely speculative or do not conform to the laws of physics.
What is the effect of different kinds of soil on plant growth?
Different types of soil have varied levels of nutrients, texture, and water retention that can affect plant growth. For example, sandy soil drains quickly but may lack nutrients, while clay soil retains water but can be dense and limit root growth. Loamy soil, with a balanced mix of sand, silt, and clay, is generally considered ideal for plant growth as it provides good drainage and nutrient retention.
What are cork cells and their functions?
Why is adding sugar or salt to water in a experiment beneficial to biological system?
It is often desirable to maintain an osmotic balance.
Most cells have a saline (NaCl or KCl) solution inside. If put in a hypotonic bath (pure water), it can cause the cells to be flooded with water and literally explode.
Putting them in a hypertonic solution (too much salt) can cause the opposite effect with water rushing out and the cells shriveling.
While amoebas may be used to clear water, human tissues are used to being bathed in saltwater.
When you use a bar to pick up small iron or steel why do you use the end of the magnet?
Magnets have a polarity which is generated by exposing them to a stronger magnetic field during manufacture.
They can be polarized through any two faces on the magnet.
Typically long skinny magnets are magnetized end to end. Flat magnets are magnetized side to side.
Neodymium magnets are relatively strong, and frequently magnetized between flat faces.
The magnetic field is very weak on the sides, and very strong at the ends (faces that were polarized).
How do you convert cc to milligram?
ACTUALLY YOU CAN!....using a simple word replacement with known values. 1 cc=1mL=16.23 minims (16.23)(1/60)drams (16.23)(1/60)(60)grains (16.23)(1/60)(60)(64.8)milligrams therefore 1cc = 1051.7mg
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The answer above is erroneous.
The milligram is a unit of mass and the cubic centimeter (or millilitre) is a unit of volume; they are not compatible. Mass is equal to the product between volume and density; you need to know the density of material.
Can magnets pushing magnets make a wheel spin?
Yes, magnets pushing against each other can create a force that causes a wheel to spin. This is the principle behind magnetic motors or generators where the interaction between magnets creates rotational motion.
What is the difference between potting soil sand and clay?
Potting soil is a growing medium specifically formulated for container plants, typically consisting of a mix of organic matter, peat moss, and perlite. Sand is a granular material composed of small rock particles, often added to soil to improve drainage. Clay is a fine-grained soil type with high water retention and poor drainage characteristics.
What has the lowest freezing point salt water sugar water plain water?
Saturated salt water freezes at a lower temp than saturated sugar water, which freezes at a lower temp than plain water. So plain water will freeze first then sugar water then salt water. Thank you QUIRKIE @ answerbag.com
Is salt and water a mixture soulution or both?
Salt dissolved in water forms a solution. A solution is a homogeneous mixture where the solute (salt) is evenly distributed in the solvent (water) at a molecular level. Each component retains its properties and can be separated through physical means.
What biological fluid does not fall into the 6-8 pH range?
Stomach Acid
Pancreatic Fluid (actually, someone else put that at 8.1). It is what neutralizes the acid.
vaginal fluid
Why does salt water rust nails?
The corrosion of iron indicates a chemical change in the metal. Rust (hydrous oxide) is an example of this change that results when iron is exposed to water or damp air. A thin film of oxide forms on the iron; this actually protects the metal from further corrosion by slowing the rate of oxidation. Where salt is present, electrochemical corrosion occurs, and the protective oxide film does not form, thus the corrosion (buildup of rust) continues unchecked. Your iron nail will indeed rust more quickly and severely in salt water.
this is a very wrong statement
Erosion can occur in various locations, such as coastlines, riverbanks, mountainsides, and deserts. It is a natural process where rocks, soil, and sediment are worn away and transported by wind, water, and ice. Human activities can also accelerate erosion in areas where vegetation has been removed or the land has been altered.
What is a good basketball science experiment?
a good basketball science experiment is seeing how a deflated ball affects your speed when dribling a ball and then test with a medium amount of air and then a highly pumped ball then compare a good website to find school appropriate science experiments is www.sciencebuddies.org a good place to find a school appropriate science experiments is www.all-science-fair-projects.com
Would salt water or pure water freeze more easily?
Salt will lower the freezing point of water.
So, "pure" water freezes easier than salt water.
What does the specific gravity of the various soft drink tellyou about their relative composition?
The specific gravity of soft drinks can give an indication of their sugar content, as drinks with higher sugar content tend to have a higher specific gravity. This measurement can also provide information about the density of the beverage compared to water, which can indirectly reflect the concentration of dissolved solids or additives in the drink. Differences in specific gravity between soft drinks may be influenced by ingredients like sugar, artificial sweeteners, or other additives.
How many natural occurring elements are there?
92
90, technetium and promethium are radioactive with short halflives, they do not occur naturally.
Of the 118 elements that are known, 94 occur naturally. The elements that do not occur on earth naturally, have been produced artificially. Some of the elements that do not occur on earth naturally have been detected in other parts of the universe. See link for more information.
Tc and Pm of number 1-92 had not been found naturally until fairly recently, but now they have. Promethium, technetium, neptunium and plutonium are now considered natural chemical elements as trace quantities have been found in nature; consequently, 94 natural chemical elements.
We know today there are 118 elements total. So far.
94 are considered natural elements as we can add promethium, plutonium and neptunium to natural elements because these elements exist in nature in ultratiny trace quantities.
About thirty native elements are known to occur naturally, by themselves, in pure form, uncombined with other elements into minerals. They include metals like copper, gold, lead, and iron; semi-metals like antimony, arsenic, bismuth, and tellurium, and non-metals like diamond, sulfur, and selenium.
Some elements decay into other elements very quickly and very little of them remain. However they can be produced in laboratories and during supernova explosions.
90, technetium and promethium are radioactive with short halflives, they do not occur naturally.
Astatine has an even shorter half life, being furiously radioactive. Make it 89 ?
90 elements out of the first 92 elements are naturally occurring
There are 88 naturally-occurring chemical elements
90, technetium and promethium are radioactive with short halflives, they do not occur naturally.
98
Where should you store caustic chemicals?
Caustic chemicals should be stored in a well-ventilated area away from incompatible materials like acids. They should be stored in a secure area with proper labeling, and should be kept in their original containers with tightly sealed lids to prevent spills or leaks. It's important to follow all safety data sheet guidelines for storing caustic chemicals.
How does heat absorption affect colors?
Light colors are light because they reflect more light energy back to your eye. Dark colors are dark because they absorb more light energy. The extreme examples of this are white, which reflects all bands of light, and black that absorbs all light. When an object absorbs light energy it will dissipate this energy as heat, as a result darker colors, that absorbed more light, will dissipate more heat, making them feel hotter. An example of this is sitting in a car with leather seats in the summertime. Cars with black leather feel much hotter than those with brown leather.
Though color directly affects light absorption, it doesn't really effect heat absorption. The different colors don't change the amount of heat they absorb, but does affect the amount of heat they dissipate (give off).
I hope this answered your question, if not just let me know and I will try to expand my answer or explain it better.
What are the chemical processes involved in heartburn relief?
Heartburn is caused by the acidic effects of stomach acid, particularly in the throat which isn't protected from acid.
It can be treated a number of ways. The simplest approach is to take a weak base that will counteract and neutralize the acid, such as calcium carbonate (tums), magnesium hydroxide (Rolaids) etc. The carbonates combine with acids to form water and carbon dioxide.
Another approach is to block the histamine that triggers the release of stomach acid with an antihistamine like cimetidine. This is typically a little slower acting, but longer lasting than neutralizing the acid as above.
A third approach is to block the secretion of hydrogen ions (acid) in the stomach. This is done with some of the newer medications such as Prevacid and Prilosec. These can be very long lasting, and are often very effective.
Keep in mind that poorly treated heartburn can cause permanent damage to the esophagus, and can cause CANCER. You should always consult a physician with any treatment regimen.
There is also a surgical remedy for heartburn called Nissen Fundoplication. Essentially by stretching a part of the stomach around the esophagus, when the stomach contracts, it shuts off reverse flow up the esophagus, and thus prevents heartburn.
What French chemist supplied proof for the theory of biogenesis?
Louis Pasteur is the name of the French chemist who supplied proof for the theory of biogenesis. The theory in question observes that life comes from life by way of reproduction. Experiments by the French-born chemist and microbiologist in question (December 27, 1822 - September 28, 1895) still serve as refutation of the theory of spontaneous generation.
Is distilled water element compound or mixture?
Distilled water is a compound because it is made up of two elements, hydrogen and oxygen, chemically bonded together to form water molecules.
What are the names of different valleys?
Some examples of valleys around the world include Death Valley in California, USA; Kathmandu Valley in Nepal; and Napa Valley in California, USA. Other well-known valleys include Yosemite Valley in California, USA, and the Rift Valley in East Africa.
