A group of athletes created an experiment to see whether running in place for two minutes would increase their pulse. They choose a student to run in place for two minutes and then measured their pulse.
They analyzed the data, and they decided that because the pulse measurement was higher than their normal value, running in place does increase pulse.

What was wrong with Experiment 1?

1.They didn't include a control group

2.They didn't include multiple trials

3.They included more than one independent variable

4.They should've had more than one test subject

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.