Print What is a Hypothesis? A hypothesis is a tentative, testable answer to a scientific question. Once a scientist has a scientific question she is interested in, the scientist reads up to find out what is already known on the topic. Then she uses that information to form a tentative answer to her scientific question.
A hypothesis is what you think the results of an investigation will be. The hypothesis for many investigations is what the scientists hopes will happen. For example, Charles Goodyear spent much time and money trying to discover a formula for making natural rubber useful. While he changed his investigations, his hypothesis was basically the same in that the new mixture would be a type of rubber that would not be sticky.
Hypothesis are not always formally written in a certain style. This is done when one is entering a contest called a science fair or if it is part of an assignment. Otherwise, a hypothesis can be a good guess.
A hypothesis should be based on some background knowledge, which can be from primary research or from secondary research.
Primary research is what you discover via investigations. Secondary research is what others have discovered and recorded. One colorant is a thermochromic chemical in leuco dye and the other is pigment in acrylic paint.
Water is added producing a liquid mixture that is painted on the labels. When the water evaporates the colorants adhere to the labels and do not rub or wash off.
Dyes with the characteristic of changing shape in response to a stimulus are called Leuco dyes. The shape of the dye molecules affect how the molecule absorbs the different colors making up white light sunlight, indoor lighting. The molecular shape changes result in the dye changing from transparent to colored.
Thermochromic dyes change from colored to transparent when heated and back to their colored form when cooled. The leuco dyes on CAT Stickers have activation temperatures below room temperature. This means that the color of the leuco dye at room temperature changes when it is cooled to a certain temperature below room temperature.
Acrylic paints do not change color with temperature fluctuations, thus a CAT sticker is the color of the acrylic paint when the leuco dye molecules are transparent. When the leuco dye molecules are colored, the CAT sticker color is a blend of the two colorants- the leuco dye and the paint.
Discover the temperature when the Leuco dye in CAT stickers is transparent and when it is colored? The leuco dye changes color at a temperature below room temperature.
Thus, the stickers needs to be cooled. Try cooling with ice. Thus, when the leuco dye is transparent, the color of the acrylic paint will be seen. The leuco dye color is never visible on the CAT Stickers. This is because when in its color form it blends with the color of the acrylic paint. Do this by rubbing the piece of ice over the surface of the sticker.
The possible combination are: One of the colors, pink or purple, is produced by the blending of two colors. Purple cannot be mixed with another color to produce pink, but pink can be mixed with blue to make purple. While never visible, the thermochromic dye mixed with pink acrylic paint has a blue color.
Using room temperature as the standard, then thermochromic dyes that are transparent at room temperature and colored when cooled are called Cold Activated thermochromic dyes.
The color of CAT stickers at room temperature is the color of the acrylic paint. This is because the thermochromic dye is transparent at room temperature.
The color of the CAT stickers when cooled below room temperature is a blend of the color of the leuco dye and acrylic paint. This is because the thermochromic dye is colored at the cooler temperature. Extended Science Questions Generally, every experiment opens the door for more investigations.includes research about your topic before writing your hypothesis ; Lesson Summary.
In this lesson, we learned how to write a hypothesis. A good hypothesis has variables and is testable. Jul 10, · This feature is not available right now. Please try again later. Oct 22, · How to Write a Hypothesis. In this Article: Article Summary Preparing to Write a Hypothesis Formulating Your Hypothesis Community Q&A A hypothesis is a description of a pattern in nature or an explanation about some real-world phenomenon that 81%(87).
They write down which food got mold first, and their experiment is over. Independent Variable Lesson for Kids: Hypothesis Lesson for Kids: Definition & . Hypothesis are not always formally written in a certain style.
This is done when one is entering a contest called a science fair or if it is part of an assignment. Otherwise, a hypothesis can be a good guess.
A hypothesis is an educated guess about the cause of a specific phenomenon. It must always be based upon prior knowledge and observation.
Use this printable scientific method worksheet to practice writing the perfect hypothesis.