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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What ball bounces the highest basketball soccer ball or a kick ball?
A basketball will typically bounce higher than a soccer ball or kickball. The higher bounce is due to the basketball being inflated to a higher pressure compared to the other two balls, resulting in greater elasticity and rebound potential.
How do you make a volcano around a bottle?
INSTRUCTIONS
First, you set a bottle in the center of a tray. I surrounded mine with a volcano mold, but you can use anything for the outside. You need a mold or some kind of form that slants down slightly, like a mountain or volcano. It takes a long time to dry.
MATERIALS
Bottle
Tray
Volcano or mountain shaped mold
Clay, sand, or whatever you choose to make your volcano out of
TIP
I know you need to make it around a bottle, but see if you can do that with a kit, because it is way easier.
What is the processes of making sense of the results of an experiment?
Making sense of the results of an experiment involves analyzing the data collected, looking for patterns or trends, and determining if the results support or refute the hypothesis. This process often includes statistical analysis to assess the significance of the findings and drawing conclusions based on the evidence presented. It is important to consider the limitations of the study and any potential variables that may have influenced the results.
What term describes a experiment done in a test tube?
A experiment done in a test tube is commonly referred to as an "in vitro" experiment. This type of experiment allows for controlled conditions within the test tube to study biological processes or reactions outside of a living organism.
What variable in a experiment stays the same?
The variable that stays the same in an experiment is called the control variable. It is kept constant throughout the experiment to ensure that any changes observed are due to the manipulated variable (independent variable) and not caused by other factors.
What do the shapes of the curves tell you about the change during the experiment?
The shape of the curve can indicate the rate of change over time, such as a steep slope indicating a rapid change and a gentle slope indicating a slow change. Fluctuations in the curve may suggest variability or instability in the data. Consistent patterns in the curve can reveal trends or relationships between variables.
What was the independent variable in Pasteur's experiment?
The independent variable in Pasteur's experiment was the type of flask used to hold the broth. He tested both open-topped flasks and swan-necked flasks to determine which allowed the growth of microorganisms.
Identify methods that can be used to break down a substance or and element?
Hydrolysis - using water to split a molecule that has formed via a condensation reaction
Photolysis - using the energy from light to split a molecule (ie, ultraviolet light depleting the ozone layer)
YEE BUDDY
What is conditions of reaction between phthalic anhydride and resorcinol?
Phthalic anhydride and resorcinol undergo a condensation reaction to form a compound called resorcinol phthalic anhydride resin. This reaction typically occurs in the presence of a catalyst, such as sulfuric acid, and at elevated temperatures around 150-200°C. The reaction leads to the formation of a polymeric material with good thermal and chemical resistance properties.
Why is chalk dissolving important?
Chalk dissolving is important in processes like weathering and erosion, where it contributes to the breakdown of rocks, soil, and other materials over time. It also plays a role in the carbon cycle, as the dissolution of chalk releases carbon dioxide back into the atmosphere. Additionally, chalk dissolution can impact water quality by affecting the pH and mineral content of water.
Is a aerosol deodorant being sprayed a solution or suspension?
Aerosol deodorant is a solution. The active ingredients, such as the deodorizing agents and fragrances, are dissolved in a liquid propellant to create a homogeneous mixture that is sprayed out as a fine mist.
Why does a candle go out when covered by a wide-mouthed jar?
When a wide-mouthed jar covers a candle, it creates a lack of oxygen inside the jar. The flame needs oxygen to burn, so when the oxygen supply is cut off, the flame extinguishes due to the lack of a crucial element for combustion.
What are the source of errors for a density experiment?
Some sources of errors for a density experiment include inaccurate measurements of mass and volume, temperature fluctuations affecting the density of the substance, and inconsistencies in the sample preparation process. Other errors may arise from equipment limitations and human error during the experiment.
Name of the gas which has high density?
It depends what other conditions you are giving us. Most elements and compounds exist at all three states (solid, liquid, and gas) at various temperatures and pressures. Even lead can exist at a vapor, albeit at a very high temperature. However you probably are more interested in the gas with the highest density at a temperature and pressure that we can all relate to, Standard Ambient Temperature and Pressure (SATP), which is essentially room temperature (25 deg C) and at a pressure equal to that at ground level (1 ATM).
If you want to know the gas with the greatest density regardless of SATP, the densest gas is Ununoctium or element 118. It exist as a gas near SATP, at around 50-110 deg C. Ununoctium is currently the only synthetic member of group 18 and has the highest atomic number and highest atomic mass assigned to a discovered element. The radioactive ununoctium atom is very unstable, and since 2002, only three atoms of the isotope 294Uuo have been detected. Although ununoctium is a member of the noble gas group, it could have a higher chemical reactivity than some elements outside this group. It was formerly thought to be a gas but is now predicted to be a semimetallic solid under normal conditions.
If you want to know the gas with the greatest density at that at SATP, the densest gas is tungsten hexafluoride. This corrosive, colourless compound is the densest known gas at a pressure of 1 ATM and room temperature (25 deg C). The colorless gas is most commonly used in the production of semiconductor circuits and circuit boards through the process of chemical vapor deposition. It has a density of 13.1 grams per liter of gas.
How many ounces of Hydrogen peroxid for 55 gallons of rainwater?
You would typically use 3-4 ounces of hydrogen peroxide for every 100 gallons of water to help oxygenate and clean the water. For 55 gallons of rainwater, you would need around 1.65-2.2 ounces of hydrogen peroxide. Be cautious not to overdose, as too much hydrogen peroxide can harm your plants.
What are the materials and equipment needed in an experiment?
Materials and equipment required for an experiment depend on the specific procedure, but common items include beakers, test tubes, pipettes, a Bunsen burner, chemicals/reagents, a microscope, and safety gear such as goggles and gloves. It's important to consult the experiment protocol or manual for a detailed list of necessary materials and equipment before starting.
How do you change the concentration of a substance?
Add more or remove some of the substance from the mixture, or add or remove some other substance from the mixture. Removal is usually more difficult, with heating (distillation or boiling off) or filtration (of a solid) being among the most direct methods.
The dependent variable in this experiment would be the rate of photosynthesis, as it is the outcome that is being measured and is expected to change based on the manipulation of the independent variable, which is the wavelength of the light.
Which action would be most important to perform in a controlled experiment?
Ensuring that only one variable is changed or manipulated at a time, while keeping all other variables constant. This helps to isolate the effects of the independent variable on the dependent variable.
Is it true that Humans are made of one single cell?
No. Humans are made of billions if not trillions of cells that work together to form all of the systems in your body such as skin, the brain, blood and organs. These cells also are not the same type of cell, for example, a skin cell differs from a red blood cell as well as a brain cell.
But each person can be said to begin from one, single cell that results from the merging of ovum and sperm.
Which is the decomposition temperature of zinc hydroxide?
Zinc hydroxide decomposes at around 125-150°C into zinc oxide and water vapor.
What is the part of an experiment that you keep the same?
The part of an experiment that you keep the same is called the "control variable." This variable is used as a baseline for comparison to measure the effect of changing other variables. Keeping the control variable constant helps to ensure that any changes observed in the experiment are a result of the manipulated variable and not other factors.
Why most only one variable change in an experiment?
That is simply not true.
There are times when a number of factors can have an effect on the outcome of an experiment but it is not possible to conduct the experiment so that only one factor is allowed to vary while all others are controlled. It is far more efficient - in terms of experimental units - to design the experiment so that the interactions between variable factors can be estimated. Experimental design is the subject that deals with the problem of designing efficient schema for dealing with a number of interacting factors. You may wish to look at "Latin square design" and "Greco-Latin squares" as an introduction to design.
