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Which type of reasoning is the basis of the scientific method?

The number of individuals involved in the experiment is called the 

Which of the following is generally the first step of the scientific method?

If one substance has a pH of 3 and another substance has a pH of 6, how much stronger the the substance that is a pH of 3?

Metabolism creates body heat. 

Atoms that have lost electrons are now _____ charged and called _____. 

Read the paragraph below. Answer the following question: What is the independent variable? A new medication for migraines is being tested. There are two groups of people (50 individuals in each group) that are suffering from frequent migraines. All individuals filled out lengthy questionnaires concerning the number of migraines that they experienced within a month and the length of those migraines. Group 1 was given the new medication which was a BLUE pill that they took every day during the length of the study period which was 6 months. Group 2 was given a RED pill that contained no active ingredient. They took this RED pill every day for the length of the study (6 months). At the end of the study, all individuals filled out the questionnaire concerning the number of migraines during the 6 month period and the length of those migraines. Individuals in Group 1 had a 75% reduction in the number of migraines and a 25% reduction in the length of their migraines. Individuals in Group 2 had 5 % reduction in the number of migraines and a 1% reduction in the length of their migraines. 

Look at the image below. Which of the following is the independent variable?

Match the information to the correct type of observation. 

Match the term to its appropriate definition or example.