What is a hypothesis? A hypothesis is sometimes described as an educated guess.
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.
Sometimes people refer to the tentative answer as "an educated guess. A hypothesis leads to one or more predictions that can be tested by experimenting. Predictions should include both an independent variable the factor you change in an experiment and a dependent variable the factor you observe or measure in an experiment.
A single hypothesis can lead to multiple predictions, but generally, one or two predictions is enough to tackle for a science fair project. Examples of Hypotheses and Predictions Question Prediction How does the size of a dog affect how much food it eats?
Larger animals of the same species expend more energy than smaller animals of the same type. To get the energy their bodies need, the larger animals eat more food. If I let a pound dog and a pound dog eat as much food as they want, then the pound dog will eat more than the pound dog.
Does fertilizer make a plant grow bigger? Plants need many types of nutrients to grow. Fertilizer adds those nutrients to the soil, thus allowing plants to grow more. If I add fertilizer to the soil of some tomato seedlings, but not others, then the seedlings that got fertilizer will grow taller and have more leaves than the non-fertilized ones.
Does an electric motor turn faster if you increase the current?
As more current flows through the motor's electromagnet, the strength of the magnetic field increases, thus turning the motor faster. If I increase the current supplied to an electric motor, then the RPMs revolutions per minute of the motor will increase.
Is a classroom noisier when the teacher leaves the room? Teachers have rules about when to talk in the classroom.
If they leave the classroom, the students feel free to break the rules and talk more, making the room nosier. If I measure the noise level in a classroom when a teacher is in it and when she leaves the room, then I will see that the noise level is higher when my teacher is not in my classroom.
What if My Hypothesis is Wrong?Problem Statement and Hypothesis 3/26/ Now that you know your independent and dependent variable, the rest of the science fair project is a piece of cake. 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. Otherwise, a hypothesis can be a good guess. A hypothesis is your guess about the answer to the project question. This is not a “wild” guess. This is not a “wild” guess.
You need to have a . Here's a list of over 30 Science Fair ideas to get you started. Then download science experiments, and watch experiment videos to inspire your project. Now that you know your independent and dependent variable, the rest of the science fair project is a piece of cake.
Your problem statement and hypothesis are extremely easy to write if you have determined your independent and dependent variables. In a science fair setting, judges can be just as impressed by projects that start out with a faulty hypothesis; what matters more is whether you understood your science fair project, had a well-controlled experiment, and have ideas about what you would do next to improve your project if you had more time.