1. A control group differs from an experimental group:
A. in the number of test organisms used.
B. by the independent variable.
C. in several ways.
D. in no way.
is it A
2. A theory and a hypothesis are different in that:
A. you must have a theory before you can form a hypothesis.
B. a theory is developed as a result of broad agreement among scientists and a hypothesis is a much less substantiated idea.
C. a theory is much easier to disprove than a hypothesis.
D. a theory can never be disproved while a hypothesis can.
is it B
Neither is correct.
1. The experimental group receives the independent variable.
The control group is similar to experimental, except it does not receive the independent variable. Extraneous variables are balanced between experimental and control groups.
2. http://www.google.com/search?client=safari&rls=en&q=theory+hypothesis+difference&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
1. The correct answer is C. A control group differs from an experimental group in several ways, not just the number of test organisms used. The control group is used as a baseline for comparison, and it does not receive the experimental treatment or independent variable that is being tested. On the other hand, the experimental group is the group that receives the treatment or independent variable being tested.
2. The correct answer is B. A theory is developed as a result of broad agreement among scientists and is a well-substantiated explanation of some aspect of the natural world. It is based on extensive evidence and has stood up to repeated testing and scrutiny. On the other hand, a hypothesis is a tentative explanation or prediction that is based on limited evidence and is used to guide further research and experimentation. A hypothesis can be tested and potentially rejected or supported by evidence, whereas a theory is a more established and widely accepted explanation.
1. To determine the correct answer, let's understand the differences between a control group and an experimental group.
In an experiment, a control group is a group that does not receive the treatment or independent variable being tested. It is used as a benchmark to compare the results of the experimental group(s), which do receive the treatment or independent variable. The control group is essential for establishing a baseline for comparison and evaluating the effects of the independent variable.
An experimental group, on the other hand, is a group that receives the treatment or independent variable being tested. This group allows researchers to observe and measure the effects of the independent variable and compare them to the control group.
Now, let's look at the answer choices:
A. in the number of test organisms used - This option does not accurately define the difference between a control group and an experimental group. The number of test organisms used can vary in both the control and experimental groups.
B. by the independent variable - This option correctly identifies the difference between a control group and an experimental group. The presence or absence of the independent variable is what separates the two groups.
C. in several ways - This option is too vague and does not specify any particular differences between the groups.
D. in no way - This option is incorrect. Control groups and experimental groups differ in at least one way: the presence or absence of the independent variable.
Based on this information, the correct answer would be B. "B. by the independent variable."
2. Let's explore the distinctions between a theory and a hypothesis to determine the correct answer.
A hypothesis is a tentative explanation or prediction that can be tested through experimentation or further investigation. It is a proposed explanation that can be supported or rejected based on evidence. A hypothesis is typically formed before conducting research or experiments and serves as a starting point for scientific inquiry.
On the other hand, a theory is a well-substantiated explanation of a natural phenomenon. It is a comprehensive framework that has been developed and supported by a substantial body of evidence. Theories are typically the result of extensive research, repeated experimentation, and consensus among scientists. They provide a broader understanding of natural phenomena and can make predictions about future observations.
Now, let's examine the answer choices:
A. you must have a theory before you can form a hypothesis - This option is inaccurate because hypotheses often precede theories. Hypotheses are formulated to test theories and provide evidence to support or refute them.
B. a theory is developed as a result of broad agreement among scientists, and a hypothesis is a much less substantiated idea - This option correctly describes the difference between a theory and a hypothesis. The broad agreement, extensive evidence, and rigorous testing distinguish a theory, while a hypothesis is an initial proposition that requires further investigation.
C. a theory is much easier to disprove than a hypothesis - This option is incorrect. Both theories and hypotheses are subject to testing and can be disproven when contradicting evidence is found.
D. a theory can never be disproved while a hypothesis can - This option is also incorrect. Both theories and hypotheses are subject to modification or rejection based on new evidence. Scientific knowledge progresses by refining and updating theories and hypotheses with new information.
Based on this information, the correct answer would be B. "B. a theory is developed as a result of broad agreement among scientists, and a hypothesis is a much less substantiated idea."