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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What is meant by cell specialization?
Cellular Specialization
The cell performing a specific function for a larger organ or tissue.
"cell specialization is an adaptation to do a particular job in a cell"
Fossil fuels are made up of compounds called what?
Fossil fuels are made up of compounds called hydrocarbons, which are organic molecules composed of hydrogen and carbon atoms. These hydrocarbons include substances like methane, propane, and gasoline, which are extracted from minerals formed from ancient organic material.
Why does sand get hotter than dirt?
Sand heats up faster than dirt because it has a lower specific heat capacity, which means it requires less heat to increase its temperature. Additionally, sand is more porous and has less moisture content compared to dirt, allowing it to absorb and retain heat more effectively.
The motion of an object thrown at an angle is motion?
The motion of an object thrown at an angle is projectile motion. This type of motion involves the object following a curved path due to a combination of its initial velocity and the force of gravity acting upon it. The object moves both horizontally and vertically as it travels through the air.
What is solution and suspension?
(I may not be spot-on, I'm not quite a Science major.)
A solution is a mixture of a liquid and one or more solids that have dissolved in the liquid and is inseparable. A suspension involves a solid and liquid; but the solids have not dissolved and are spread throughout the liquid or have settled at the bottom and have dissolved very little, or have not dissolved.
Sunlight dishwashing liquid ingredients?
The main ingredients in Sunlight dishwashing liquid typically include water, sodium laureth sulfate (cleaning agent), sodium dodecylbenzene sulfonate (surfactant), sodium xylenesulfonate (surfactant), and fragrance. It may also contain preservatives and dyes.
What are the different parts of the nerve system?
The Central Nervous System (CNS) comprises of 4 main parts; the forebrain, midbrain, hindbrain and spinal cord. All four parts and linked together and each tend to control specific parts of the vertebrate. In humans the forebrain is the most developed of the 'three brains' and allows us to hold a stronger understanding of our surrounded compared to that shown by other vertebrates.
There are two main categories of nerves which carry nerve impulses in and out of the CNS, spinal and cranial.
Cranial nerves are nerves which emerge from the brain stem (considered to be part of the midbrain), and are one of three types. Sensory, which carries nerve impulses into the CNS. Motor, which carries nerve impulses away from the CNS. And mixed, which carries nerve impulses both into and away from the CNS.
Spinal nerves are located in the vertebras of the spin and contain sensory neurons which are located in the dorsal roots, motor neurons which are located in the ventral roots and relay neurons which are located in the grey matter.
Will mold grow faster on white bread wheat bread or Hawaiian bread?
Mold might grow faster on wheat bread.
How fast a loaf of bread will go moldy depends on several different things including:
- the age of the bread since it was baked
- the quality of the flour and other ingredients
- whether or not any mold inhibitors were added before it was baked i.e. food preservative chemicals which help to extend the period of freshness
- the conditions under which the bread was stored from when it was baked until it was purchased
- the conditions under which the bread is being stored after purchase.
The velocity of sound in metal is 330m/s. This is due to the closely packed atoms in a metal i.e.,solid.
-Rochish. email at rochi4all89@yahoo.com
The number you mentioned is an approximate velocity of sound in AIR. In metals the sound travels much faster than that. The speed of sound in gases, liquids, and solids is calculated from their density and bulk modulus (elastic properties of the media). The more dense is the media, the faster the sound travels.
For example, the speed of sound in iron is 5130 m/s, in gold - 3240 m/s, in diamond - 12000 m/s.
What is the purpose of the nervous system in your body?
The nervous system is what makes decisions about what the body does. It controls the body, and perceives what is going on both within and outside the body, in order to be able to make appropriate decisions.
Where are some nuclear power plants in the US?
Some nuclear power plants in the US are located in states like Illinois, Pennsylvania, South Carolina, and New York. Key nuclear plants include the Palo Verde Generating Station in Arizona, the Limerick Generating Station in Pennsylvania, and the Braidwood Generating Station in Illinois.
Why should the rubber gas hose on a Bunsen Burner be as flat as possible on the bench?
Keeping the rubber gas hose flat on the bench helps prevent any potential gas leaks or kinks in the hose. This ensures a continuous and safe flow of gas to the Bunsen burner, allowing for consistent and optimal performance during experiments.
no, a cloud is made of water and dirt particles. so if you were to lay on one you would fall through. this factor enables us to move through things such as fog.
What are some ideas for 4 grade science project?
You can do a tornado in a bottle. I had fun with that. get two clear bottles (those 1 liter soda bottles work great) and colored liquid. You will also need a connecting piece. you can buy them at a bunch of places. If you need more info you can look here:
http://www.stevespanglerscience.com/experiment/00000056
http://www.weatherwizkids.com/tornado1.htm
http://pbskids.org/zoom/activities/phenom/tornadoinabottle.html
What can affect the strength of an electromagnet?
Factors such as the number of turns in the coil, the amount of current flowing through the coil, the material of the core inside the coil, and the presence of any ferromagnetic materials nearby can affect the strength of an electromagnet. Additionally, the size and shape of the coil, as well as the distance between the coil and the object being attracted, can also impact the magnet's strength.
Can someone tell how to build a working model of water level indicator with alarm or without alarm?
Yes I can tell how to make one without an alarm. Let us assume that you want it to be very simple and easy to understand, and safe to work on. First, you need a "float", a ball with a rod attached. You could use an old ball from a toilet tank. Attach the rod to a fixed point of the tank, or if in a pond, attach to a post or pier in the pond. Tie a cord to the float rod, near the ball. Run the cord over a pivot point (a pully or nail). Put a small weight (metal object or lead fishing sinker) on the end of the string. Paint a scale (level indication of the body of water) on a piece of plywood. Mount the scale near the weight on the end of the cord. Now as the water level rises and falls, the weight will move up and down. The higher the water level, the lower the scale, so this will be an "inverse scale" with the highest level at the bottom and the lowest level at the top. If you want an alarm, you could place a bell below the weight. As the level rises, the weight will strike the bell, ringing the alarm.
Different parts of analytical balance?
*weighing pan
*adjustable feet
*wind screen
*level indicator
*on/ off switch
*LCD Display
*zero switch
*mode switch
*function switch
*subpan
*send switch
How many different types of TB are there and What are there names?
4 types.
primary tb pneumonia
renal tb
tb mengitis
tb peritonitis *****************************************************************
I will expand on the answer given above: When people including doctors are writing about tuberculosis they usually begin: "Tuberculosis is spread by........." or "Tuberculosis symptoms are........". This is wrong. Most people are usually speaking of ONE type of tuberculosis in fact PULMONARY (Lung) TUBERCULOSIS.
It is easier to think of tuberculosis in a similar way to cancer. Tuberculosis like cancer can affect ANY part of the body.
For the uninitiated there are many types of tuberculosis and many diseases related to tb that are called tuberculosis.
Parts of the body infected by tuberculosis include:
Tuberculosis meningitis: Brain
This is caused by the spread of Mycobacterium tuberculosis to the brain,
from another site in the body. The symptoms usually begin gradually.
Genitourinary TB: see also uterus tb below
In men, genital TB may present as epididymitis or a scrotal mass.
In women, genital Tb may mimic pelvic inflammatory disease.
This type of TB causes approximately 10% of sterility in women worldwide and approximately 1% in industrialized countries.
Gastrointestinal TB:
Any site along the gastrointestinal tract may become infected.
Tuberculosis lymphadenitis (scrofula): Lymph
The most common site is in the neck along the sternocleidomastoid muscle. It usually is unilateral. It usually is unilateral, with little or no pain. Advanced disease may suppurate and form a draining sinus.
Cutaneous TB: TB of the skin
Several different types of cutaneous TB exist.
Direct infection of the skin or mucous membranes from an outside source of
mycobacteria results in an initial lesion called the tuberculous chancre
Uterus Ovarian TB:
Female genital organs are one of the common sites to be involved in women.
It is a chronic disease and bacteria may remain for long time
slowly destroying the organs. The disease may remain totally symptomless or may lead to pelvic pain,
Infertility may be caused even by early or minimal disease.
Osteo-articular Skeletal - Bone - Joint TB:
The most common site of a involvement is the spine "Potts diseases.
Symptoms include back pain or stiffness. Lower extremity paralysis occurs
in as many as half the patients with undiagnosed Potts disease
Tuberculous arthritis usually involves only 1 joint.
Although any point may be involved, the hip of the knee is affected most commonly, followed by the ankle, elbow, wrist, hip or the knee is affected most commonly, followed by the ankle, elbow wrist and shoulder.
Other types of tuberculosis
Below is a listing of some infections that are not actually tuberculosis but caused by a bacteria related to it. (Note the term mycobacterium). And yet they are still called tuberculosis or Environmental tuberculosis, or Atypical Tuberculosis. The proper name for these infections is actually NTM- "Non tuberculosis mycobacterium" *
* Mycobacterium Avium-Intracellulare *
* Mycobacterium Chelonae *
* Mycobacterium Fortuitum *
* Mycobacterium Gordonae *
* Mycobacterium Haemophilum *
* Mycobacterium Kansasii *
* Mycobacterium Marinum *
* Mycobacterium Xenopi *
I write this because too many people including doctors use the word tuberculosis as a coverall word. When I was diagnosed with tuberculosis I was told it was a "special type" of tuberculosis, and then told it was a "different type" of tuberculosis when in fact I had been diagnosed with Mycobacterium Chelonei which is NOT actually tuberculosis.
For the record I later found out I had been misdiagnosed!
What is the hypothesis of an invisible ink?
The hypothesis of an invisible ink could be that the ink will become visible when exposed to a certain type of light or heat, based on the properties of the ink's chemical composition.
Will tonic water help plant grow?
In some cases tonic water won't hurt the plant, and may help it grow. However, in some cases, it can kill the plant. Be sure to research your particular plant before you try this.
A virus is not considered living because it cannot survive or replicate on its own. It requires a host cell to multiply and cannot carry out metabolic processes or reproduce without hijacking a host cell's machinery.
What type of energy is created by friction?
Friction produces thermal energy, also known as heat energy. This is because as objects rub against each other, the kinetic energy of their movement is converted into heat energy due to the resistance of friction between the surfaces.
What is the difference between indepedent and dependent variables?
In a science experiment, the independent variable is the one you change. For example: if you are doing an experiment on the impact of different types of soil on plant growth, the different types of soil would be your independent variable. The dependent variable is the outcome, or whatever the independent variable directly impacts. In this case, the dependent variable is the height of each plant.
Working models on conservation of energy?
Some common working models on conservation of energy include the law of conservation of energy, which states that energy cannot be created or destroyed, only transferred or transformed. Other models include mechanical energy conservation, where the total mechanical energy of a system remains constant if only conservative forces are acting on it, and the principle of energy conservation in thermodynamics, which states that energy can change forms but the total energy in a closed system remains constant.
