Scientific Knowledge Answers

In March 2015, the American space program sent astronaut Scott Kelly to live on a space station for a whole year, where he will not feel gravity as the space station orbits Earth. Scott Kelly’s twin brother, Mark, stayed at home. Scientists then plan to study the twins’ body chemistry, genetics, sight, and other data. This way, scientists can find out how living with and without gravity affects two identical people.

Consider the cycle of science shown in the diagram.

Which best describes scientific facts?

Which best describes why it is important for a scientist to use the metric system when recording data?

Which is a characteristic of pseudoscience?

objectiveobservableprovensubjective

Which characteristic should describe all evidence collected by a scientist?

After scientists use a careful process to gather evidence and establish scientific facts, which step most likely occurs next in the scientific process?

explanationhypothesisobjectiveobservation

Meditation is a practice of sitting still and quiet for minutes or even hours. It has been practiced for thousands of years and is even a part of religious practices for some people. Carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that helps people connect with their current surroundings and activities.