Share your thanks with Meredith Juncker, PhD
Your thanks is on its way!
Meredith Juncker, PhD
Scientific Researcher
wikiHow's Editorial ProcesswikiHow partners with over 1000+ experts from a wide range of fields to ensure our content is accurate and based on well-established research and testimony. Content Managers conduct interviews and work closely with each expert to review information, answer reader questions, and add credible advice. Learn more about our editorial process and why millions of readers trust wikiHow.
Q&A Comments (100)
Co-authored Articles (55)
How to
Predict the Weather Without a Forecast
Generally, most of us rely on forecasts to tell us what kind of weather to expect. However, it is possible to predict the weather using your skills of observation and knowledge of weather patterns. Not only can predicti...
How to Draw a Model of the Digestive System (With Pictures!)
Plus, learn how to label each organ in your digestive system drawingWhether you’re drawing the digestive system for a school project, a study guide, or just for fun, sketching out this biological diagram can help you t...
How to
Check Water Temperature Without a Thermometer
At some point, you may find that you need to determine the approximate temperature of water and do not have a waterproof thermometer. You can roughly figure out water’s temperature by looking for signs that indicate if...
How to
Measure VO2 Max
VO2 max is a measure of the maximum amount of oxygen that you use during intense physical activity. This measurement is the best indicator of aerobic endurance and cardiovascular fitness as it calculates how efficiently ...
How to
Build a DNA Model
Making your own DNA model is a fun science project that you can do with all kinds of easy-to-find materials. Using either pipe cleaners and tape or styrofoam balls and toothpicks, you can build a 3-dimensional model that...
How to
Find the Number of Protons, Neutrons, and Electrons
Finding the number of protons, neutrons, and electrons in a given element isn't as hard as it sounds. Oftentimes part of your answer will be right in front of you in the periodic table! Once you know where to look, findi...
How to
Grow Bacteria in a Petri Dish
Ever wanted to grow bacteria for a science project or just for fun? It's surprisingly simple! All you need is some agar (a special gelatinous growing material), a number of sterilized Petri dishes, and some disgustingly ...
How to
Make Your Own Crystals
There are many ways to make your own crystals at home with just a few supplies. You can make crystals that are edible, like rock candy. You can even make beautiful gems. It makes a fun and easy science project for kids, ...
How to
Buy Citric Acid
Citric acid is available for purchase through many different types of stores. Where you choose to buy citric acid depends on what you plan to use it for and how much you wish to purchase. Citric acid is a weak acid natur...
How to
Calculate Half Life
The half-life of a substance undergoing decay is the time it takes for the amount of the substance to decrease by half. It was originally used to describe the decay of radioactive elements like uranium or plutonium, but ...
How to
Do Spectrophotometric Analysis
Spectrophotometry is an experimental technique that is used to measure the concentration of solutes in a specific solution by calculating the amount of light absorbed by those solutes. This technique is powerful because ...
How to
Calculate Fluid Pressure
When a fluid is at rest, it exerts a force perpendicular to any surface in contact with it. This force, which is due to the continuous, random motion of molecules, is known as fluid pressure. Knowing the fluid pressure i...
How to
Do Pipette Calibration
Pipettes are a type of lab equipment used to measure and transfer very small volumes of liquid. Accuracy and precision in pipette measurement are necessary as any discrepancy in volumes dispensed can affect the results o...
How to
Write a Net Ionic Equation
Everything you need to understand & write total ionic equationsNet ionic equations are an important aspect of chemistry as they represent only the entities that change in a chemical reaction. They are most commonly used ...
How to
Predict Your Baby's Eye Color
There are no definite ways to predict eye color, but there are some steps you can take to make an educated guess when predicting your baby’s eye color. The most obvious place to start is noting the color of the parents...
How to
Study for Biology
Although biology is a mandatory class, it doesn't have to be a painful one to study for and get through. It is a subject that builds upon itself, so it's essential to understand the basic concepts before you can understa...
How to
Make a Baking Soda and Vinegar Rocket
Making a baking soda and vinegar rocket is a great idea for a science project, or a fun activity to do with a friend or family member at home. Start by assembling the body of the rocket complete with rocket fins. Use PVC...
How to
Calculate Wavelength
Wavelength is the distance of 1 frequency wave peak to the other and is most commonly associated with the electromagnetic spectrum. Calculating wavelength is dependent upon the information you are given. If you know the ...
How to
Make a Hydrometer
Use a homemade hydrometer to measure liquid densityA hydrometer is a simple device that allows you to measure the density of various liquids relative to water. Hydrometers are used for a myriad of different purposes: the...
How to Grow Mold on Bread for a Science Project
Observe how long it takes mold to grow with this simple experimentInterested in doing a ''fun-gi'' science experiment for school? Making mold grow on bread is not only a great project for the local science fair, it also ...
