Researchers performing a well-designed experiment should base their conclusions on

data from repeated trials of the experiment

the hypothesis of the experiment

a small sample size to insure a reliable outcome of the experiment

results predicted before performing the experiment

A student hypothesized that lettuce seeds would not germinate (begin to grow) unless they were covered with soil. The student planted 10 lettuce seeds under a layer of soil and 10 lettuce seeds on top of the soil. The data collected are shown in the table.

repeat the experiment using a larger sample size

conclude that light is necessary for lettuce seed germination

conclude that darkness is necessary for lettuce seed germination

Based on experimental results, a biologist in a laboratory reports a new discovery. If the experimental results are valid, biologists in other laboratories should be able to perform

the same experiment and obtain the same results

an experiment with a different variable and obtain the same results

the same experiment and obtain different results

an experiment under different conditions and obtain the same results

An experiment was designed to determine if chlorophyll is responsible for the growth of corn seedlings toward light. In the experiment, equal numbers of albino corn seedlings and green corn seedlings were grown at a temperaure of 24°C. All other environmental conditions were the same for both groups of seedlings. The results of the experiment showed that both the albino seedlings and the green seedlings bent toward light. Which hypothesis is being tested in the experiment?

Chlorophyll is needed for corn seedlings to grow toward light.

Albino corn seedlings grow as fast as green corn seedlings.

Differences in genotypes produce variations in corn phenotypes.

Light is required for germination of corn.

Diagrams, tables, and graphs are used by scientists mainly to

Predict an independent variable

design a research plan for an experiment

How does the control setup in an experiment differ from the other setups in the same experiment?

It differs in the one variable being tested.

It utilizes a different method of data collection.

It tests a different hypothesis.

In an investigation designed to determine the effect of the amount of water on plant growth, two groups of equal-sized bean plants of the same species were grown under identical conditions, except for the amount of water they were given. One group was watered with 200 milliliters of water once a day, while the other group was watered with 400 milliliters of water once a day. After several days, the heights of the plants were measured. It was determined that the plants watered with 400 milliliters of water once a day showed more growth. The independent variable in this investigation is the

amount of water given to the plants each day

type of bean plants used in the experiment

type of soil the bean plants were growing in

In an investigation designed to determine the effect of the amount of water on plant growth, two groups of equal-sized bean plants of the same species were grown under identical conditions, except for the amount of water they were given. One group was watered with 200 milliliters of water once a day, while the other group was watered with 400 milliliters of water once a day. After several days, the heights of the plants were measured. It was determined that the plants watered with 400 milliliters of water once a day showed more growth. The dependent variable in this investigation is the

type of bean plants used in the experiment

amount of water given to the plants each day

type of soil the bean plants were growing in

The bar graph shows the height of a plant at the end of each week of a five-week growth period. Which statement represents a valid conclusion based on the information in the graph?

The plant grew fastests during the first three weeks, and then it grew slower.

The plant was given water during the first 3 weeks only.

The plant will grow faster during the sixth week than it did during the fifth week.

The plant grew slowest during the first three weeks, and then it grew faster.

A biologist formulates a hypothesis, performs experiments to test his hypothesis, makes careful observations, and keeps accurate records of his findings. In order to complete this process, the biologist should

evaluate the findings and, if necessary, alter the hypothesis based on his findings, and test the new hypothesis

adjust the data to support the hypothesis

eliminate data that do not support the hypothesis

write a research paper explaining his theories before performing his experiments, in order to gain funding sources

A company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For its initial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that

only one brand of vitamin was tested

the sample size was not large enough

Tomato plants in a garden are not growing well. The gardener hypothesizes that the soil is too acidic. To test this hypothesis accurately, the gardener could

change the pH (acidity) of the soil

plant seeds of a different kind of plant

reduce the amount of water available to the plant

move the tomato plants to an area with less sunlight

A student formulated a hypothesis that cotton will grow larger bolls (pods) if magnesium is added to the soil. The student has two experimental fields of cotton, one with magnesium and one without. Which data should be collected to support this hypothesis?

diameter of the cotton bolls in both fields

color of the cotton bolls in both fields

height of the cotton plants in both fields

length of the growing season in both fields

The development of an experimental research plan should NOT include a

conclusion based on data expected to be collected in the experiment

list of safety precautions for the experiment

list of equipment needed for conducting the experiment

procedure for the use of technologies needed for the experiment

During a laboratory activity, a group of students obtained the data shown in the chart. Which procedure would increase the validity of the conclusions drawn from the results of this experiment?

increasing the number of times the activity is repeated

changing the temperature in the room

decreasing the number of students participating in the activity

eliminating the rest period before the resting pulse rate is taken

Scientific Method - Regents Exam Review

Authored by Tamanna Shahid

Biology

9th - 12th Grade

NGSS covered

Used 15+ times

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30 questions

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In 1910, Thomas Morgan discovered a certain pattern of inheritance in fruit flies known as sex linkage. This discovery extended the ideas of inheritance that Gregor Mendel had discovered while working with garden peas in 1865. Which principle of scientific inquiry does this illustrate?

A control group must be part of a valid experiment.

Scientific explanations can be modified as new evidence is found.

The same experiment must be repeated many times to validate the results.

Values can be used to make ethical decisions about scientific discovery.

Tags

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Students were asked to determine if they could squeeze a clothespin more times in a minute after resting than after exercising. An experiment that accurately tests this question should include all of the following except

a hypothesis on which to base the design of the experiment

a large number of students

two sets of clothespins, one that is easy to open and one that is more difficult to open

a control group and an experimental group with equal numbers of students of approximately the same age

Tags

NGSS.MS-ETS1-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which statement best describes a controlled experiment?

It eliminates the need for dependent variables.

It shows the effect of a dependent variable on an independent variable.

It avoids the use of variables.

It tests the effect of a single independent variable.

Tags

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which statement most accurately describes scientific inquiry?

It ignores information from other sources.

It does not allow scientists to judge the reliability of their sources.

It should never involve ethical decisions about the application of scientific knowledge.

It may lead to explanations that combine data with what people already know about their surroundings.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-1

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Why do scientists consider any hypothesis valuable?

A hypothesis requires no further investigation.

A hypothesis may lead to further investigation even if it is disproved by the experiment.

A hypothesis requires no further investigation if it is proved by the experiment.

A hypothesis can be used to explain a conclusion even if it is disproved by the experiment.

Tags

NGSS.HS-PS4-3

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The analysis of data gathered during a particular experiment is necessary in order to

formulate a hypothesis for that experiment

develop a research plan for that experiment

design a control for that experiment

draw a valid conclusion for that experiment

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A scientist is planning to carry out an experiment on the effect of heat on the function of a certain enzyme. Which would not be an appropriate first step?

doing research in a library

having discussions with other scientists

completing a data table of expected results

using what is already known about the enzyme

Tags

NGSS.HS-PS1-5

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Scientific Method - Regents Exam Review

In 1910, Thomas Morgan discovered a certain pattern of inheritance in fruit flies known as sex linkage. This discovery extended the ideas of inheritance that Gregor Mendel had discovered while working with garden peas in 1865. Which principle of scientific inquiry does this illustrate?

Students were asked to determine if they could squeeze a clothespin more times in a minute after resting than after exercising. An experiment that accurately tests this question should include all of the following except

Which statement best describes a controlled experiment?

Which statement most accurately describes scientific inquiry?

Why do scientists consider any hypothesis valuable?

The analysis of data gathered during a particular experiment is necessary in order to

A scientist is planning to carry out an experiment on the effect of heat on the function of a certain enzyme. Which would not be an appropriate first step?

Researchers performing a well-designed experiment should base their conclusions on

The graduated cylinder contains 50 ml of water

A woman with a Yankees shirt likes baseball.

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