Hypotheses, Theories, and Laws Answers

Omar wrote a hypothesis about batteries called dry cells.If more dry cells are connected end to end, a light bulb will work longer because there is more energy available.What are the variables in his hypothesis?

The idea that the universe began from a single point and expanded to its current size explains a large number of observations, including those in the table below.Observations ExplainedThe universe consists mostly of low-mass elements.Cosmic microwave background is nearly the same in all directions.Light from other galaxies shows that these galaxies are moving away from Earth.In addition, many predictions based on the idea have led to additional observations that support it. Which best describes this idea of the origin of the universe?

Which phrase is most likely to start a description of a scientific theory?

For which of these questions could a testable hypothesis be developed?

What effect, if any, does the development of new areas of science and technology have on theories?

For which question could a testable hypothesis be developed?

Based on early observations, including those in the table below, scientists proposed that the continents were once together but had drifted apart. However, scientists could not identify anything that would make them move. New technology, such as a worldwide network of earthquake detectors, led to new observations. Then scientists proposed that Earth’s surface was divided into tectonic plates that would move as a result of forces linked to earthquakes and the formation of new ocean floor.

Doctors once believed that illness was caused by foul air and could not be transmitted from one person to another. Now, doctors know that single-celled bacteria and even smaller viruses cause illnesses and can be transmitted from one person to another.How did the advent of the microscope most likely affect the foul-air theory?

Every object that has mass attracts every other object with a gravitational force. It has been proven that the size of the gravitational force increases as the objects’ masses increase, but gravitational force decreases rapidly as the distance between the objects increases.Which best describes this statement about matter and its behavior?

Under what condition will the results of an experiment based on a hypothesis most likely lead to new experimentation?