SC.5.N.1.1

You completed an experiment, but your results do not match the rest of the class. Why would your teacher ask you to repeat your investigation?

• to have you change your hypothesis to match your results

• to change your steps to get the same results as the rest of the class

• to see if your original results were caused by an error

• to see if your can get new results to match your hypothesis

A student writes the following list of materials in her lab notebook:

1. Collect materials:
2. 3 rose plants
3. milk
4. Pepsi
5. orange juice
6. 3 measuring cups

What piece of information did the student NOT include in her list of materials to ensure that someone could repeat this experiment?

• the location of the experiment

• the type of measuring cup used in the experiment

• the temperature of the liquids used in the experiment

• the amount of each liquid used in the experiment

Tags

NGSS.MS-ETS1-1

What is NOT a reason why is it important that an experiment can be repeated by someone else?

• so other people can see if the results were correct

• so others can develop their own research from the experimenter's work

• to show all the errors the experimenter made during the experiment

• to prepare for future experiments

Tags

NGSS.MS-LS1-5

What is the independent variable?

• It is the one variable being changed in an experiment.

• It is the results of the experiment.

• It is what is remaining the same in an experiment.

• It is what happens normally and is used to compere the results of the independent variable.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

What are the constant/controlled variables?

• It is the one variable being changed in an experiment.

• It is the results of the experiment.

• It is what is remaining the same in an experiment.

• It is what happens normally and is used to compere the results of the independent variable.

Tags

NGSS.MS-PS2-2

What is the control group?

• It is the one variable being changed in an experiment.

• It is the results of the experiment.

• It is what is remaining the same in an experiment.

• It is what happens normally and is used to compere the results of the independent variable.

Frogs use the sun to keep warm. Mike hypothesizes that his frog will prefer swimming in warm water. He places his frog on a block in the middle of the bathtub, and measures how much time the frog spends off the block during a ten minute period. He conducts the experiment under four conditions in the bathtub: no water, warm water, cool water, and room temperature water. In this experiment, which is the control group?

• no water

• cool water

• room temperature water

• warm water

Tags

NGSS.MS-LS2-1

Why might a scientist repeat an experiment if she didn't make a mistake in the first one?

• To make more money

• To ensure that the results are consistent and repeatable

• To make sure to obtain expected results to match hypothesis

• To determine if any portion can be skipped and still get the same results

Tags

NGSS.MS-LS2-4

NGSS.MS-PS1-2

When an experiment is repeated and the new results are different from the original results, what could you assume to be true?

• The results from both experiments are worthless

• The first experiment's results are worthless and should be discarded

• The experimental design is flawed and the experiment should be discarded

• Neither test results are 100% reliable and additional experimentation is needed

Tags

NGSS.MS-PS2-5

If a student notices that frogs are all gathering at one end of the pond the student has done what?

• observed

• experimented

• hypothesized

• collected data