Would love some help pleaseee. and please at least read the question instead of skipping it please. Test the Hypothesis
The next step in designing the experiment is to test the hypothesis. Experiments usually involve several that must be identified and analyzed.
• Independent variables are variables that scientists to test the effects on the dependent variables. Ideally, there’s only one independent variable.
• Dependent variables are variables by the changes made to the independent variable.
When conducting studies in medical research, some factors can’t be controlled because of time, cost, or considerations.
Repeat or Retest
Repeating a trial reduces the possibility of . Experiments should be repeated by other scientists to check for accuracy.
scientific theory – an of why a natural phenomenon occurs that is well- supported by repeated experimentation over time
 For example, the explanation of gravity happens.
scientific law – a scientifically acknowledged confirmed by repeated
experimental observations
 For example, the explanation of gravity affects objects.
Scientists create further hypotheses, analyze the data, and establish conclusions. The conclusions drawn should answer these questions:
• What happened in the experiment? •
• What are the recommendations for future research?
Communicate the Results
Scientists communicate their results to other scientists to encourage them to or the experiment. Researchers often communicate their results in scientific journals.
Thinking Scientifically
Skepticism means the truth of a claim or a fact and accepting statements as facts only when well-substantiated supports them. Being skeptical helps scientists analyze more information, observe minute details in their theories, find flaws in their designs and results, and reduce bias.
Critical Thinking
Critical thinking helps scientists work on flaws, design new studies, and find to real- life problems.
Taking Accurate Measurements
Scientists strive for measurements that are both reliable and accurate.
Reliability (consistency): The tools used to gather data give consistent results they are used.
Validity (accuracy): A piece of equipment or a test precisely measures what it is to measure.
 For example, a malfunctioning blood pressure cuff gives consistent readings that are 10 points higher than the actual reading.
The cuff is A) reliable B) not reliable and c) valid D) not valid.

Is laundry detergent an acid or a base?

Show transcript transcripts online experiment: atomic structure [the history of atomic theory] this animation will you test rutherford’s hypothesis that it took a great number of shots to actually hit the nucleus because the size of the atom was so much larger than the nucleus.[clipboard and pencil with a diagram of rutherford’s gold foil experiment] we are going to use a cardboard box to represent the atom, a wooden block to represent the nucleus, and marbles to represent the alpha particles. [animated cardboard box, wooden block, and marbles] the box’s measurements are: length = 50 cm, width = 25 cm, and height = 25 cm. the measurements of the block are: length = 10 cm, width = 10 cm, and height is 5 cm. jose and priscilla will conduct the experiment. [animated boy and girl] priscilla put the block in the box on the floor. jose will close his eyes and drop marbles into the box trying to hit the block. priscilla will count the number of times the marbles hit the block and move the block in the box after each hit. [animated block moving inside the box. marble dropping into the box.] here is priscilla’s data of how many times the marble hit the block. out of 100 marble drops or shots, the marble hit the block 32 times. [data table: first column: marble, with rows 1 to 100; column 2: hit, with rows indicating yes or no. last row: total hits] now you can follow the directions in the experiment to present your findings. present your findings when you are finished with the experiment, complete the following data analysis and record your answers in the essay box below. determine the volume of the box and the block. determine the ratio of the block to the box: multiply this number by 100 to turn it into a percent. complete this statement: the volume of the block is percent of the volume of the box. determine the ratio of the number of hits to the number of shots: multiply this number by 100 to turn it into a percent. complete this statement: the block was hit percent of the time. compare the results of step 2 to the results of step 3. are the percentages similar? write a conclusion discussing the following items: based on your findings, do you think rutherford's hypothesis was reasonable? restate rutherford's hypothesis and describe how you tested it. state whether your results support the hypothesis. if they do not, can you suggest some error in experimental procedure (other than general human error) that might explain it? finally, explain how this experiment confirms the nuclear model of the atom and the idea that most of the atom is empty space.

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c