Science Chapters 1-4 True or False

The independent variable in an investigation to find how light affects the growth of plants is the amount of sunlight.

True because the independent variable is the one you can control in a test.

Scientists repeat an experiment several times to collect data.

False because a scientist repeats an experiment to draw a valid conclusion. The results of each test should be similar.

If you replicate another scientist's investigation and come up with very different results, it means you performed an experiment incorrectly.

False because it could mean the other scientist left out details in their procedures.

The only way to test a hypothesis is to perform an experiment.

False because scientists can use models, surveys, and sampling.

Scientists can use information found on the internet in a blog to answer a scientific problem.

False because the information they use must be agreed upon by other scientists.

The steps used in scientific methods must always be performed in the same order.

False because the steps used do not need to be performed in a certain order.

As long as you read carefully through the instructions for a science activity, you will be safe.

False because there are many other steps to follow in addition to reading the instructions.

If you collect, organize and interpret your data properly, you will always be able to draw a logical conclusion.

False because there may be data that needs to be tied to other data to draw a logical conclusion.

A scientist can only replicate a scientific investigation if he or she watched someone else perform it.

False because you can do it on your own by following procedures.

In this investigation, you are testing how far a toy car will roll on different surfaces, the two variables you can control are the starting and ending point and the degrees of ramp angle.

True

A control group is a standard against which change is measured.

True because a control group is used in an experiment.

A survey is a questionnaire that is given to a number of people whose answers are recorded then analyzed.

True because a survey is used by scientists to investigate.

There is no single "scientific method" for finding answers.

True because scientists can use models, surveys, and sampling.

Sampling is the process of selecting people or organizations from a population of interest to study.

True because scientists use sampling to collect data.

It is important for scientists to do repeated trials when doing an experiment because a conclusion must be validated.

True because the results of each test should be similar. Other scientists should be able to repeat your experiment and get similar results.

The steps used in a scientific method can be performed in any order.

True because the steps used in scientific methods do not need to be performed in the same order.