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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
Is NaF a binary inonic compound?
Yes, NaF (sodium fluoride) is a binary ionic compound. It consists of sodium ions (Na+) and fluoride ions (F-) held together by ionic bonds.
What happens if you add more loads to a series circuit?
When you have multiple loads in a series, the resistance of the loads is added together allowing very little current to flow through the circuit to power any of the loads, making for a low amperage circuit. If you have your loads in parellel, the resistance of the loads in the circuit is subtracted which allows more current to flow, making for a high amperage circuit.
To calculate the total trash produced per year, multiply the trash produced per week by the number of weeks in a year. 12 kg/person/week * 150,000 people = 1,800,000 kg/week 1,800,000 kg/week * 52 weeks = 93,600,000 kg/year
Therefore, the city produces 93,600 metric tons of trash per year.
What are two things scientist use to organize data?
Scientists use data tables and graphs to organize their data. Data tables allow for a clear presentation of numerical information, while graphs provide a visual representation of trends and patterns in the data.
What is a pipette bulb use for in chemistry?
A pipette bulb allow a liquid to be sucked up into the pipette, so avoiding having to use your mouth to suck the liquid up. Apart from avoiding often toxic liquids getting into your mouth, it also avoids contamination of the liquid.
How fast does white bread mold?
White bread typically starts to mold within 3-5 days, depending on factors such as temperature and humidity. Mold growth can be accelerated in warmer and more humid environments. It is important to store bread in a cool, dry place and consume it before it shows signs of mold.
A animal that eats both plants and animals?
An animal that eats both plants and animals is known as an omnivore. Omnivores have a varied diet that includes consuming both plant matter like fruits and vegetables, as well as animals such as insects, small mammals, or fish. Examples of omnivores include bears, raccoons, and humans.
The study of the heavenly bodies?
The study of the heavenly bodies is known as astronomy. It involves observing, analyzing, and understanding celestial objects like stars, planets, moons, comets, and galaxies. Astronomers use tools like telescopes and other instruments to gather data and uncover the mysteries of the universe.
The Sun itself cannot support life as it is a star made of hot gases. However, the Sun's energy is essential for supporting life on Earth by providing warmth and light for photosynthesis, which is the basis of the food chain.
The name for nonmetallic minerals valued for their beauty and rarity is "gemstones." Gemstones are prized for their aesthetic qualities and are often used in jewelry and decorative items. Examples include diamonds, rubies, and emeralds.
What is a pipette safety bulb?
A pipette bulb is the rounded part of a pipette which you squeeze the air out of, then release to draw liquid into the pipette.
If you are using a calibrated glass pipette, it will be a separate piece made of rubber which is fitted to the pipette.
If it is a simple plastic pipette then the bulb will be made of the same semi-transparent plastic, and the pipette will all be one piece.
Why are coloured liquids good for diffusion experiments?
Colored liquids are good for diffusion experiments because they allow you to visualize and track the movement of particles as they spread out. The color helps to easily see the change in concentration over time, making it easier to measure and analyze the rate of diffusion.
What is a cooperation in the ecological relationship?
Cooperation are enterprises owned by consumers and managed democratically which aim at fulfilling the needs and aspiration of their members...........:) now give me an example of a cooperation........................:):):):):):):):):):):):(:(:(:(:(:(:(:(:(:(:
What is the chemical formula of Borsche's reagent?
It is 2,4-dinitrophenylhydrazine with the chemical formula C6H6N4O4.
If you soak chicken bones in coffee. What effect does the coffee have on the chicken bones?
Soaking chicken bones in coffee will not have a significant effect on their structure or composition. The bones may absorb some of the coffee's flavor and color, but it will not alter their physical properties.
Is mixing baking powered with water a chemical or physical change?
It is first a physical change, but depending on the ingredients being mixed it may be followed by chemical changes.
What is the definition mass measurement?
According to SI, we can use gramms, kilogramms and tons, for example.
What is the molecular structure for Na2PO3F?
The molecular structure of Na2PO3F consists of a sodium ion (Na+) bonded to another sodium ion (Na+), a phosphorus atom (P), an oxygen atom (O), and a fluorine atom (F). The phosphorus atom is bonded to three oxygen atoms (O) and one fluorine atom (F) in a tetrahedral arrangement.
Where to buy small amounts of dry ice for a science project?
You can buy small amounts of dry ice at some grocery stores, party supply stores, or welding supply stores. Call ahead to confirm availability and make sure to bring a cooler with you to safely transport it.
What is the substance that gets dissolved?
A solution is a uniform mixture. The substance that gets dissolved is called the solute. The substance that does the dissolving is called the solvent.
What is an example of polymerase chain reaction?
Polymerase chain reaction (PCR) is used to amplify nucleic acids. It was invented in its current form by Kary Mullins in 1983/1986.
The template (DNA or RNA) is duplicated by a thermostable DNA polymerase - originally from Thermus aquaticus - using sequence specific primers (short single-strand oligonucleotides) that are designed to sit on either side of the piece of template that is to be amplified.
Changes in temperature are used to move through the different stages required to duplicate the DNA.
- 95°C denatures DNA to two single strands.
- The temperature is decreased to ~50-60°C to allow the primers to anneal (bind) to the 5' end of the DNA templates - the exact temperature is 5°C lower than the primer's sequence-determined melting point (Tm). At the melting point half of the dissolved primers in solution would be annealed to the template DNA.
- The temperature then climbs to 72°C where the polymerase adds dNTPs to the 3' end of the primer - most commercial DNA polymerases can elongate 1000 bases per minute. Some have "proof-reading" activity, where it can correct a wrong base it may have inserted. If the template is RNA then a reverse transcriptase is used - it reads the RNA, but makes DNA.
- The reaction is heated again to 95°C to restart the cycle. After the last cycle the reaction is held at 72°C for a few minutes to ensure that all the strands are fully elongated.
Each cycle duplicates the template, meaning an exponential increase in the amount of the target sequence. Usually, 30 cycles produce sufficient DNA for downstream applications. More cycles may produce more, but at some point the enzyme becomes less efficient or the dNTPs run out.
How does a compass determine direction?
A compass is a free-spinning magnet that will align itself to be parallel to the Earth's magnetic field lines. Since the Earth's magnetic poles are located relatively close to its geographic poles, a compass pointing to Earth's magnetic north pole also indicates the general direction of Earth's geographic north pole.
What minerals are in a limestone?
Limestone commonly predominantly contains Calcite and Aragonite which are the two crystal forms of Calcium Carbonate (CaCO3). It commonly also contains detrital clasts (broken pieces of other material) such as flint or chert which are silica.
Some limestones also contain the mineral dolomite which is Calcium Magnesium Carbonate (CaMg(CO3))2.
What state of matter are held tightly in place by other particles?
The state of matter that is held tightly in place is in the form of a solid. Gas particles are not tightly packed, unless they are being pressurized, same with water.
What element is present in lead graphite?
Graphite is a form of Carbon, so its carbon in lead graphite. Notice that lead itself is a different element but the term "lead graphite" is generally used for that black substance which makes the "lead pencils".
Note that there is no lead in lead pencils, its carbon, in the shape of graphite.
