# IPS Exam Study Guide

## Scientific Methiod

1. Identify Problem.

2. Gather Information.

3. Form Hypothesis.

5. Perform Experiment.

6. Conclusion.

## Chapter 1 Vocabulary

Observation- information obtained by the senses, often by direct measurement.

Inference- a conclusion based upon known observations.

Hypothesis- A proposed solution to a scientific problem.

Control Group- the group that is standard for comparison in any experiment.

Experimental Group- the group receiving the variable being tested.

Control Factors- the variables that are held constant. They are the same for both the control group and the experimental errors,

Indicator- a substance used to show the presence of another substance.

Volume- the amount of space something occupies. True of solids, liquids, and gases.

Volume Displacement Technique- quick and easy way to determine the volume of a solid or gas.

Mass- the amount of matter in a substance (true of solids, liquids, and gases).

Meniscus- the curved portion of a liquid when in a container. Must read the bottom of the meniscus at eye level for proper measurement.

## Dry Sand and Air

Sand + water - water = Sand Alone

Air divided by Sand and Air= Percentage of Air

Sand divided by Sand and Air= Percentage of Sand

## Sensitivity of Balance

Mf- Mi = Change in Mass

Change in Mass divided by the number of changes= Sensitivity of Balance

## Reaction in a Bag Lab

Liquid changes color and temperature because of the separate solids.

## Density, Volume, and Mass

Density= Mass divided by Volume

Volume= Mass divided by Density

Mass= Density x Volume

Lab 1.1 Heating Baking Soda