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- 1 What is the science behind popping popcorn?
- 2 What is the chemical reaction for popcorn?
- 3 Which brand of popcorn pops the best science experiment?
- 4 What pressure does popcorn pop at?
- 5 What are 5 examples of physical change?
- 6 What are the examples of physical change and chemical change?
- 7 What is a good 5th grade science fair project?
- 8 What is needed on a science fair project?
What is the science behind popping popcorn?
The reason why popcorn pops is the water trapped inside its kernel. If the kernel is heated to a high enough temperature, this water will transform into steam. With high temperatures, the starch gelatinizes and then expands with the rapid burst of the kernel.
What is the chemical reaction for popcorn?
When the kernel is heated, the starch becomes more fluid like a jelly. At a certain pressure and temperature, the pericarp will suddenly break open and releases the pressure, steam, and starch. Rapid air cooling and drying of the starch creates the fluffy shape of popcorn.
Does popping popcorn represent a chemical or physical change?
When popcorn is popped, liquid inside the kernel is changed to steam. Pressure from the steam builds up inside the kernel. When the pressure reached a critical stage the kernel pops turning itself inside out. This is a physical change.
What type of change occurs when popcorn is popped?
Students will discover that, while a popped piece of popcorn appears to have undergone a significant change, no new substance is created in the process and popping popcorn is, thus, a physical change. All of the materials that are in an un-popped kernel are the same as what makes up a popped piece of popcorn.
Which brand of popcorn pops the best science experiment?
Table of Contents.
What pressure does popcorn pop at?
around 135 psi
Why It Pops When the popcorn reaches a temperature of 180 C (356 F), the pressure inside the kernel is around 135 psi (930 kPa), which is sufficient pressure to rupture the popcorn hull, essentially turning the kernel inside-out.
Is popcorn an element or compound?
Corn/popcorn is a mixture of various compounds of starch, protein, fat, sugars, fiber and apparently vitamins and minerals — according to Wikipedia. Of course, if you like salt and butter on your popcorn, you can add those to the list…
What is the element of popcorn?
All compounds in popcorn are organic, meaning they contain carbon, oxygen, and hydrogen.
What are 5 examples of physical change?
Examples of Physical Changes
- Crushing a can.
- Melting an ice cube.
- Boiling water.
- Mixing sand and water.
- Breaking a glass.
- Dissolving sugar and water.
- Shredding paper.
- Chopping wood.
What are the examples of physical change and chemical change?
Examples of physical change include, cutting paper, melting butter, dissolving salt in water, and breaking glass. A chemical change occurs when matter is changed into one or more different types of matter. Examples of chemical changes include, rusting, fire, and overcooking.
What are examples of chemical and physical changes?
Why does popcorn pop chemistry for kids?
According to Wonderopolis: “Inside each kernel of popcorn is a tiny droplet of water surrounded by a hard shell called a hull. As the popcorn is heated, the water turns into steam, which builds pressure inside the kernel. When the hull can no longer contain the pressure —POP!
What is a good 5th grade science fair project?
Composting and psychology projects are good science projects for fifth graders. A fifth grade science project is the culmination of the elementary school curriculum.
What is needed on a science fair project?
Include each step of your science fair project: Abstract, question, hypothesis, variables, background research, and so on. Use a font size of at least 16 points for the text on your display board, so that it is easy to read from a few feet away. It’s OK to use slightly smaller fonts for captions on picture and tables.
What is the purpose of a science fair project?
What is the purpose in a science fair project? While healthy competition can be exciting, the purpose of a science project is to learn science through inquiry in a hands-on experiment. How do you write a purpose for an experiment? How-to write an abstract.
What is the procedure for a science fair project?
A science fair project is an investigation that is designed to solve a problem or answer a question. It is a ‘science’ fair project because you use a procedure called the scientific method to answer the question. The ‘fair’ part takes place when everyone who has done a project gathers together to showcase their work.