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Which statement describes how a scientist makes scientific explanations?
A scientist bases scientific explanations on a large body of observations of the world.
A scientist bases scientific explanations only on other scientists’ opinions.
A scientist suggests scientific explanations and makes up evidence to make them true.
A scientist bases scientific explanations on personal experience and opinions.
Which description defines a dependent variable in a scientific experiment?
Any factor that is controlled during an experiment.
Any factor that is measured to gather results
Any factor that is changed so that it can be tested
Any factor that changes during an experiment
What is the correct term for this diagram?
A group of students measures the mass and volume of an object to calculate its density.
Which procedure increases the accuracy and validity of the group’s data?
repeating the experiment and analyzing all the data
having group members individually calculate density
changing the procedure to check whether the results are constant
varying the equipment used to check whether the results are constant
On which day was there the least difference between the low temperature and high
Which description defines an experiment?
prediction of something that will happen
observation of results from uncontrolled events
development of a testable explanation of an event
procedure applied systematically under controlled conditions
Which of these statements about atomic models is most likely correct?
The atomic model has not changed over time.
As scientists learned more, they modified the atomic model.
Scientists are still debating which of the three theories is right.
Scientists think real atoms look like a combination of the three different models
This equation represents what type of model?