Key Assumptions of a Model

Key Assumptions of a Model

Vocabulary

Accuracy

How well the results of an experiment agree with the accepted value.

Computer Model 

This is a computer program, or network of computers, that attempts to simulate an abstract model of a particular system.

Hypothesis

This is a prediction of the outcome of scientific processes based on analysis.

Example: predicting the path of a hurricane

Measurement 

This is collection of data made by comparing objects in standard units. In science, the units are metric.

Example: 400.0 grams, 2 meters

Prediction

This is a statement that a particular event will occur, based on reasonable observations of prior events.

Example: Weather forecasts

Research

 This is what people do when they are searching for information. People often look in more than one location.

Scale Drawing

A drawing that shows an object in accurate proportion but is shown enlarged or reduced by a certain amount.

Multiple Choice

The model represents the oxygen cycle on Earth. If widespread habitat destruction and urbanization continues, how might we expect this model to change, as represented by flux?

• We would see a decrease in atmospheric oxygen.

• Weathering would proceed at a much faster rate.

• Both the biosphere and atmosphere levels of oxygen would decrease.

• There would be a dramatic increase in oxygen within the lithosphere.

Multiple Choice

When a gas like the one shown is released into a room, it tends to fill the room. Kinetic molecular theory explains this by assuming that

• gas particles are heavy.

• gas particles travel as individual atoms.

• gas particles are extremely light.

• gas particles have no attraction for each other.

Multiple Choice

Niels Bohr is responsible for the atomic model shown. This model assumes

• that electrons are equal in energy.

• that electrons each have a magnetic spin.

• that electrons in an atom behave like a planetary system.

• that electrons are stationary