| A | B |
|---|
| conclude | to form an opinion: decide by reasoning |
| classify | to group things together because they share one or more properties |
| conclusion | a decision that is based on observation or on a study of data |
| classify | to group things together because they share one or more properties |
| controlled variable | a variable in an experiment that is kept the same |
| data | iformation, such as gathered during an experiment |
| variable | an element in an experiment that can be changed |
| weight | a measurement of theforce of gravity on an object |
| changed variable | a single variable altered in an experiment |
| condensation | the process by which a gas becomes a liquid. Water vapor turns into liquid water by condensation. |
| cycle | a period of time taken up by a series of events or actions that repeat themselves regularly and in the same order. |
| erosion | the process by which earth materials are broken down and moved from place to place. |
| evaporation | the process by which a liquid becomes a gas. |
| ecosystem | a community that includes all the living and nonliving things found in a certain area. |
| glacier | a huge mass of ice that moves very slowly over land. |
| graph | a diagram used to show the relationship between things. |
| model | a small version of an object or a process that scientists use to study an actual thing or event. In this unit, your stream table is a model of the actual interactions between land and water. |
| pattern | a repeating arrangement of shapes, colors, numbers, or other things. |
| precipitation | rain, snow, sleet, or hail. |
| procedure | a set of steps that explains how to do something. |
| property | something about an object that helps identify it. |
| soil | the top layer of earth. Soil is composed of organic materials, inorganic materials, water, and air. |
| solution | a mixture created when a substance is dissolved in a liquid, solid, or gas. |
| stream | a body of running water flowing on the earth |
| vapor | fine particles of matter floating in the air and clouding it. |
| variable | an element in an experiment that can be changed |
| waste | a region that has few people or is empty of most signs of life. |
| water | the liquid that descends from the clouds as rain, forms streams, lakes, and seas, and is a major part of all living material and that is an odorless and tasteless compound having two atoms of hydrogen and one atom of oxygen per molecule. |
| weathering | the process by which earth materials are broken down by natural forces. |
| weight | a measurement of the force of gravity on an object. a per |
