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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What do control groups and experimental groups have in common?
Yes in a way, and no in a way.
In a blind study, the control group will be the group that is administered the placebo, the sugar pill, while the experimental group will be treated with the actual medication (if this is a study on how a medication affects something).
That way, the researchers can see what side effects are real or not (obviously people on the sugar pill will not be experiencing nausea as a cause of the pill but rather because their mind thinks they are).
Is Large Hadron Collider experiment successful?
YES! The Test was very successful, but due to a problem with the magnets on Sept. 19 2008 they have shut down the LHC it will be re-tested ( used ) In The summer Of 2009. For the test run, no black holes where detected. Also They want to see if the big bang could really happen.
What is the container used for growing mold or bacteria called?
The container used for growing mold or bacteria is called a Petri dish. It is a shallow, flat dish made of clear glass or plastic with a lid to create a controlled environment for the growth of microorganisms.
What does conclusion mean in science?
In scientific terms, a "conclusion" is the final interpretation of findings based on available data. This does not mean that what one concludes is neccessarily correct - only that it fits the available facts. (For example, Aristotle concluded that men were more intelligent than women because men have more teeth. The data he gathered to make this conclusion was clearly faulty, and men and women have equal numbers of teeth. Nonetheless, if he counted the teeth of ten men and ten women, found men to have more on average, and then, upon testing the intelligence of each group found men to score higher by his standards, his conclusion was as accurate as could be given the data.)
What are the properties of cement?
Cement is a powdery substance that hardens when mixed with water, binding together other materials like sand and gravel to form concrete. It has good compressive strength, durability, and resistance to various environmental conditions. It is a versatile construction material used in buildings, bridges, roads, and other structures.
Forming a hypothesis and designing an experiment are two steps in the?
First: Consider WHAT will be your manipulative variable (a variable that you can control while other variables remain constant) that you believe will affect your experiment
Second: Consider HOW your responding variable will respond when you manipulate your manipulative variable after keeping everything else constant
Example:
First: My manipulative variable is mass of weight and you believe this variable will affect the speed of the trolley when roll down the rail
Second: The larger the mass of the trolley, the faster it will move down the rail
Does salt or sugar affect water evaporation?
salt evaperats faster than all of sugar and salt mixed and your mom ( . ) ( . )
What is the real density for water?
The melting point of ice is 0 °C (32 °F, 273 K) at standard pressure; however, pure liquid water can be super cooled well below that temperature without freezing if the liquid is not mechanically disturbed. It can remain in a fluid state down to its homogeneous nucleation point of approximately 231 K (−42 °C). The melting point of ordinary hexagonal ice falls slightly under moderately high pressures, but as ice transforms into its allotropes (see crystalline states of ice) above 209.9 MPa (2,072 atm), the melting point increases markedly with pressure, i.e. reaching 355 K (82 °C) at 2.216 GPa (21,870 atm) (triple point of Ice VII).A significant increase of pressure is required to lower the melting point of ordinary ice ---the pressure exerted by an ice skater on the ice would only reduce the melting point by approximately 0.09 °C (0.16 °F).
Temp (°C)
Density (kg/m3)
+100
958.4
+80
971.8
+60
983.2
+40
992.2
+30
995.6502
+25
997.0479
+22
997.7735
+20
998.2071
+15
999.1026
+10
999.7026
+4
999.9720
0
999.8395
−10
998.117
−20
993.547
−30
983.854
The density of water (in kg/m3)
at various temperatures in degrees Celsius
The values below 0 °C refer to super cooled water.
A solid that turns straight to gas without turning to a liquid goes through a process called sublimation. An example of the this at normal atmospheric pressure is carbon dioxide (or dry ice) that will convert straight from the solid into a gaseous state. You don't know what your talking about you idiot!! Go die in a hole!
Is pumice stone homogeneous mixture of solid and gas?
Pumice stone is a porous volcanic rock formed from solidified lava with trapped gas bubbles. It is not a mixture, but rather a heterogeneous material with a mixture of solid and gas components throughout its structure.
What is the variable in an experiment?
The variable in an experiment is the element that is being tested or measured. It is the factor that can change or be manipulated to observe its effect on the outcome of the experiment. There are independent variables, which are manipulated by the researcher, and dependent variables, which are what is being measured.
What variable does not change in an experiment?
The variable that does not change in an experiment is called the control variable. It is used as a benchmark for comparison to observe the effects of the other variables being tested.
Do detergents affect the plant growth in experiments?
Yes, detergents can affect plant growth in experiments. Detergents can disrupt the cell membranes of plants, leading to decreased growth and nutrient uptake. It is important to be cautious when using detergents in plant experiments to avoid negative effects on plant health.
What Are Good 7th Grade Science Fair Projects?
A winner at my school was.... Find out which school has more germs. Your elementary school or your middle school? Collect samples from the door knobs, floors, and desks. Then analyze your samples. They won first place.
What is a real life example of simple diffusion?
Perfume. If you spray any type of perfume in one area of a room, soon you can smell it at the other side of the room. When first sprayed, the perfume is highly concentrated in one area. Then diffusion kicks in and the particles move from an area of high concentration to an area of low concentration until it there is an equal concentration throughout.
Can a magnet break glass if you put two magnets in between it?
That depends on the strength of the magnet and thickness of the glass.
A regular magnet may work through a thin piece of glass, however a weak magnet will not work through a thick piece of glass.
What controls movement of materials in and out of nucleus?
The nuclear pore complexes control the movement of materials in and out of the nucleus. These complexes act as gateways that regulate the passage of molecules such as proteins, RNA, and ions between the nucleus and the cytoplasm. The movement of molecules through the nuclear pore complexes is tightly regulated to maintain the integrity and function of the nucleus.
What is the definition of constant variable?
The definition of constant variable is a variable whose value cannot be changed once it has been assigned a value for an experiment. It is the variable held steady, or constant, for a specific experiment.
The study likely tested how the size of the nail (diameter, length) affects the electromagnet's strength. This could demonstrate how changes in the core material impact magnetic properties. The number of paper clips picked up would increase with a larger or more magnetic core, showing a proportional relationship.
it is a real word it is a science term. If you think its not a real word you dont pay attention very much. People from atoka are smart it means go to google and look it up cause i have no clue but im fixin to know so :)
If you were moving as fast as a light beam would you be invisible?
When a telescope views a far off star, one that is said to be a light year away for example, we are seeing beams of light (and the image of that star) that have been travelling for one year at 10,000,000,000,000 kilometers per year.(10 to the 13th. power kpy) So end-on, we see the results (visible). From the side,(invisible), it's travelling too fast. So the answer depends on whether we are seeing the light beam coming toward us or if it is passing by . CursingL: If you move at the speed of light. The light, that would usually bounce of you so other people would be able to process the image with there eyes, would stay on you and never bounce off. Think about that
How are a hypothesis a prediction and an experiment related?
A hypothesis is a proposed explanation for a phenomenon. A prediction is a statement that forecasts what will happen based on the hypothesis. An experiment is conducted to test the hypothesis and, in turn, test the accuracy of the prediction.
Is the process of condensing exothermic or endothermic?
Condensation is considered a type of exothermic reaction. Condensation is something that is released, which means that is exothermic instead of endothermic.
