0
Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
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.
What is meant by a control plate in pglo experiments?
a control plate in your particular case is a ampicillin plate with no inoculation of your transformed bacteria. its purpose to make sure that during the process of handling the plate there were no contamination by bacteria in the surrounding.
Why did flies lay eggs on the net in redi's experiment?
Because although the flies could not lay the eggs on the meat because they were to big to get through the netting they could lay them on the netting knowing that the maggots when they hatched would be small enough to fit through the netting holes to get to the meat therefore being able to nurish themselves.
There are many different types of terrariums and making a simple terrarium is not difficult. There are just a few steps and a few things you have to watch out for. Here is a step by step overview of the process of making a small dish terrarium which is one of the easiest types to make.
1. Select a container - The container can be almost anything at all. You can choose something dish like to create an open air container or something bottle like to create a closed environment terrarium which is a bigger challenge to make and to maintain.
2. A Layer of course sand or pebbles is placed in the bottom of the container. This allows for good drainage of the water in the terrarium. There is no need for holes in the bottom of your container. This is so the water can be reused as it is needed. It will be pulled up from the pebble layer.
3. Activated Charcoal - If you are making a closed container terrarium you should next place a layer of activated charcoal over the pebbles/sand layer. In a closed environment this charcoal will filter the air and keep it fresh. This is the type of charcoal used in aquarium filters so you can purchase it at any pet shop with aquarium supplies. If you are making an open top terrarium there is no need for this charcoal.
4. Add a layer of Spaghnum Moss on top. This prevents the soil in your terrarium from settling down into the pebbles. It is kind of a like a filter that will allow the water to filter down but not the soil. If you don't have spaghnum moss a very fine screen will work well here but over time the screen will rust and need to be replaced.
5. Add Soil - Regular potting soil works fine. There is no need to try a fancy mix. But if you are creating a desert scene and using cactus you may want to get potting soil specifically designed for them.
6. Add the plants and or seeds. Care should be taken in this step. You want to arrange things in a way that is pleasing to the eye. You may want to make sketches before you plant. Or you may want to dig some small holes and move the plants around -trying different locations and arrangements.
7. Finishing touches - Add ornaments or other decorations. These add a nice touch to your terrarium.
What plants should you get for your terrarium?I wouldn't worry too much about what exact plants to get for your terrarium. I recommend you get plants that you find pleasing and see what happens. Care for them as best you can and see how they do. You can always remove a plant and replace it with something else. Anyway here are some recommendations to specific plants.- Palm Neanthe Bella -Low light and grows slowly - hardy
- Swedish Ivy - Very durable low care plant
- Bird Nest Sansivieria Extremely hardy
- Irish Moss - Makes nice groundcover
- Croton - Come in many bright colors but need a lot of light
- Pothos - Medium Light , nice shaped leaves
- Button Fern -
- Pitcher Plant - Carnivorous - nice exotic look
- Butterwort - Carnivorous
- Miniature African violets - Adds nice color
- Cactus - High sunlight and sandy soil
- Herbs - Don't hesitate to use herbs like parsley, mint, chives, oregano or others in your terrarium. They tend to be hardy, stay small and often add a little bit of a nice aroma.
How do you convert micrograms of reduced glutathione to nanomoles of reduced glutathione?
I can't answer this for reduced glutathion, because it is not exactly known to me what it is. So I'll try to help you on the way by answering this for the molecule: Glutathion, as it is:
The only thing to know is the molar mass of it, so here it is.
(The molar mass of reduced glutathion might be different)
Glutathion, C10H17N3O6S, Molar mass = 307.32 g/mol
1 g/mol = 1 g / 1 mol = 106 mcg / 109 nanomol = 10-3 mcg/nanomol
So: 307.32 g/mol = 0.30732 mcg/nanomol Glutathion
Why are amounts of gasses in the atmosphere usually shown in percentage of dry air?
Besides the gases that comprise air, air can also contain variable amounts of water vapor, characterized by the term, "relative humidity". Because the amount of water vapor held in air can change, it is simpler and more sensible to express component gas percentages on the basis of dry air. ProfHoff 830 (Always say of who you are citing)
