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Writing if then hypothesis worksheet for middle school

Writing if then hypothesis worksheet for middle school sure there are no

The scientific method is a great critical thinking tool in the classroom. Learn how to create and implement a scientific method worksheet for a middle school class in this how-to video from About.com. Show transcript Hide transcript

Hello I’;m Milo for About.com and today we are talking about how to write a scientific method worksheet for middle school.

How to Start a Scientific Method Activity

There are some specific steps to writing a scientific method worksheet when working with students as we are trying to get them to develop critical thinking skills. The first step is to come up with a question, a problem that needs to be tested out to be proven true or false.

Get the children to brainstorm and get them to formulate questions based on what they are able to observe around them. The goal is for them to learn to think critically and to learn to questions and not take things for granted. Go through the questions the kids have come up with and point out the difference between observations and inferences.

Performing Research and Forumlating a Hypothesis

The second step is to get the class to do research about the topic.The students can use books, the Internet, ask the teacher, or interview people knowledgeable in the topic. Have the students keep a journal, writing down their search, both failures and success as well as their finds. In this journal you can make special emphasis on new vocabulary they make come across.

The third step is to formulate a hypothesis. During this step, we are getting the class to practice reasoning using the facts they have collected to re-formulate the question into a testable hypothesis.

Writing if then hypothesis worksheet for middle school what matters more is whether

Conducting the Experiment

Finally, the experiment. Here you can make up an experiment for them or look through science books or the Internet to find one that is appropriate for your age group. Introduce the concepts of variables in the scientific method. Explain and make sure they understand what a controlled variable is VS an independent variable.

Make sure to allow a space on the worksheet for a list of materials. During the experiment, the students should keep track of what’;s happening in their journal as accurately as possible. They should understand that they are collecting data. This is a good place to introduce the concepts of quantitative and qualitative observation in research.

InterpretinData and Writing the Conclusion

When the experiment is finished it is time for the conclusion. Here the data collected during the experiment is analyzed and it becomes apparent if the hypothesis was correct or not. Encourage the kids to use the new vocabulary they have learned in their paper and arrange for classroom presentations of each one of the projects.

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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.

Writing if then hypothesis worksheet for middle school the factor you observe or

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.” Keep in mind, though, that the hypothesis also has to be testable since the next step is to do an experiment to determine whether or not the hypothesis is right!

A hypothesis leads to one or more predictions that can be tested by experimenting.

Predictions often take the shape of “If ____then ____” statements, but do not have to. 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

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 70-pound dog and a 30-pound dog eat as much food as they want, then the 70-pound dog will eat more than the 30-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?

Electric motors work because they have electromagnets inside them, which push/pull on permanent magnets and make the motor spin. 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?

What happens if, at the end of your science project, you look at the data you have collected and you realize it does not support your hypothesis? First, do not panic! The point of a science project is not to prove your hypothesis right. The point is to understand more about how the natural world works. Or, as it is sometimes put, to find out the scientific truth. When scientists do an experiment, they very often have data that shows their starting hypothesis was wrong. Why? Well, the natural world is complexit takes a lot of experimenting to figure out how it worksand the more explanations you test, the closer you get to figuring out the truth. For scientists, disproving a hypothesis still means they gained important information, and they can use that information to make their next hypothesis even better. 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. You can read more about a science fair judge’s view on disproving your hypothesis here.

It is worth noting, scientists never talk about their hypothesis being “right” or “wrong.” Instead, they say that their data “supports” or “does not support” their hypothesis. This goes back to the point that nature is complexso complex that it takes more than a single experiment to figure it all out because a single experiment could give you misleading data. For example, let us say that you hypothesize that earthworms do not exist in places that have very cold winters because it is too cold for them to survive. You then predict that you will find earthworms in the dirt in Florida, which has warm winters, but not Alaska, which has cold winters. When you go and dig a 3-foot by 3-foot-wide and 1-foot-deep hole in the dirt in those two states, you discover Floridian earthworms, but not Alaskan ones. So, was your hypothesis right? Well, your data “supported” your hypothesis, but your experiment did not cover that much ground. Can you really be sure there are no earthworms in Alaska? No. Which is why scientists only support (or not) their hypothesis with data, rather than proving them. And for the curious, yes there are earthworms in Alaska.

Hypothesis Checklist

What Makes a Good Hypothesis?

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