Different microscopic organisms cause different diseases. When a dangerous microscopic organism is transferred from one person to many people, the disease it carries will spread.
Mildew is a fungus that grows in wet areas and can slowly grow from microscopic to large stains in showers and sinks. Researchers are studying different sprays that could be used to slow down the growth of mildew. They set up different showers that are exactly the same and expose them each to water with the same microscopic amount of mildew. They then spray some showers with mildew-preventing sprays and observe how fast mildew grows over time.
Germ theory describes true relationships between microorganisms and how people get sick. What is a difference between germ theory and scientific laws?
Students are experimenting with a substance that they think can be added to soil to increase the number of flowers a certain plant will make. They set up 20 pots of soil, each planted with the same type of seed. They divide the pots into two groups and add 15 drops of the substance to pots in one group and only 10 drops to pots in the other group. After the plants grow for four weeks, the students count how many flowers each plant has made.
Which statements are true of all scientific endeavors?
accuracyprecisionreplicationrepetition
Hallie takes notes in class as shown below.Developed through making observations About the natural world Observation → question → hypothesis → experiment
Four students collected data for the length of an object.Student 1Student 2Student 3Student 45.55.67.88.1 Which statement correctly describes the students’ data?
Which statement would most likely explain why the results of one new experiment did not support an accepted hypothesis?
Which are scientific questions that can be asked about a collection of different orchid types? Check all that apply.
Which statement is a scientific law?
The idea that people behave in odd ways on a full moon is an example of
accuracyprecisionreplicationrepetition
Which scenario most likely shows how a scientist can use creativity?
When scientists first started mapping human genes, they estimated that there were about 2 million genes. By the late 1990s, it was thought that there were only 100,000 genes, and then that number shrank to 19,000 in 2001. Most scientists now believe that humans have about 21,000 genes.Which statement describes these estimates?
What should scientists do after completing a scientific investigation?
Which of these are characteristics of a scientific law? Check all that apply.It contains an explanation of facts.It states a fact about how nature works.It is based on observations of nature.It often changes over time with new experiments and technology.It explains why a group of hypotheses are related.It will most likely remain true even when scientists work with new experiments.
Scientists are studying a group of ant colonies in the Arizona desert. Which question about the ants can be answered scientifically?
Mr. Grayson demonstrated an experiment at the beginning of class. Then each student worked in pairs to carry out the experiment and collect data.Which term best describes what took place during the class?
hypothesislawtheoryquestion
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