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Science Experiments

Experiments often conducted by students to test different scientific theories and hypotheses

500 Questions

What happens when a glowing splint is added to hydrogen?

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'Bang/POP'.

If there is any oxygen near, then the hydrogen will ignite with a 'POP'.

What is the difference between incidence and prevalence?

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Incidence is a key epidemiological measure that measures the rate of new cases of a specific disease within a population during a defined time period, indicating the risk of developing the condition. It is expressed as a rate or proportion. On the other hand, prevalence represents the total number of cases, both new and existing, at a specific point in time, offering a snapshot of the overall burden of the disease in the population. Prevalence is expressed as a proportion or percentage. For example, there are 500 cases of a disease in a population of 10,000 people at a specific time, the prevalence would be calculated as 5%.

Both measures play essential roles in epidemiology, providing different perspectives on the occurrence and impact of diseases in a community.

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What has 3 letters and is used to hold items in a science lab?

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Test tubes, beakers and pipettes, among other things, are used to hold small amounts of liquid in a science lab.

The law of motion that states that an object will maintain its straight line motion until acted upon by an unbalanced force is?

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It is Newton's first law of universal dynamics.

More correctly written as ' A body will remain in uniform motion unless acted upon by a force'.

I leave you to find the other two Newtonian Laws of Universal Dynamics.

How should you dress during a lab experiment?

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Asked by Wiki User

Lab. Dress. :-

#1 Lab. Coat, buttoned up

#2 Goggles to protect eyes

#3 Nitrile Gloves to protect hands

#4 Long hair to be tied back

#5 Wear thick cotton (denim) clothes to absorb any splashes

#6 Wear trainers or shoes or boots to protect feet from heavy falls/drops of chemicals or kit.

YES!!! You'll look ugly, but your are safe.

10 things that do not dissolve in water?

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pepper, sand, dirt, paper, plants, metals, hair, wood, lead, cotton.

Why does vinegar eat the shell off the egg?

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Asked by Wiki User

Because there is a large component of calcium carbonate in the egg shell.

Remember

Acid + Carbonate = Salt + Water + Carbon Dioxide.

2CH3COOH + CaCO3 = Ca(CH3COO)2 + H2O + CO2

Will iron nails rust faster in salt water or freshwater?

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Asked by Wiki User

  1. Does iron nail rust faster insltor fresh water

2. materials:

two nail,two cup,salt water,fresh water,

3. Hypothesis.I think that a nail rust faster in salt water because of the chemicals in the salt.

4. Procedure:

inde variable:same nail and fresh and salt water

dep variable:how many days will it take

con varable:size of nail,different water

steps

gather my m

How does sound travel from a source into your ear?

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sound vibrate the eardrum a lightly streched membrane that is the entrance to the middle ear

Are inferential statistics different from descriptive statistics?

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  1. Which one of the following is true about statistics?

A) Inferential statistics deals with collecting, summarizing, and simplifying data about given population

B) Descriptive statistics is also known as inductive statistics

C) Descriptive statistics goes beyond describing a given problem situation by means of collecting, summarizing and meaningfully presenting the related data

D) Descriptive statistics is one which describes the population. On the other hand, inferential statistics issued to make the generalization about the population based on the samples.

How much fossil fuels does the US use?

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Cheap Flight Tickets Flight Tickets Flight Booking Cheap Flights Air Ticket Booking Airfare Premium Economy Class Business Class Flights First Class Flights

Is a hypothesis is a decision based on the results of the experiment.?

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No. An hypothesis is an idea put forward to explain an observation. Often you do the experiment to test the hypothesis. The results of the experiment may help you decide whether to discard your hypothesis or to test it further.

Theoretical values for linear expansion of steel?

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Asked by Wiki User

this is a simple question... I believe that the theoretical value for the linear expansion of steel is extremely simple. Ask a science teacher and they will be able to help you. If you go to the library you can borrow a book on this subject. I hope i helped you in your mission. Thank you very much for your time.

Have an excellent life.

i hope u get an answer.

:)

What are the disadvantages and advantages of geographic filing system?

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what are the advantages and disadvantages of geographic system of filing

What is a legend on a science fair project?

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The 'legend' is a piece of text explaining the purpose of the project and what it sets out to show.

What are the characteristics of makahiya?

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one of the characteristics are the irritability,colors,and movement

What is practical use for metallic changes?

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One practical use to a metallic change is to obtain a purified form of the more active and or valuable metals. We do this through electrolysis.

Which factor is the dependent variable in an experiment?

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The dependent variable is what the results yielded. For example, if you are testing humans, the dependent variable will be the test subject's answers. Some people also say it is what you are testing for if it is not testing on humans. For example, "the differences in growths of bacteria".