diff --git a/js/gravity-force-lab-basics/view/GFLBMassNode.js b/js/gravity-force-lab-basics/view/GravityForceLabBasicsMassNode.js
similarity index 90%
rename from js/gravity-force-lab-basics/view/GFLBMassNode.js
rename to js/gravity-force-lab-basics/view/GravityForceLabBasicsMassNode.js
index d6abf4d..461e30e 100644
--- a/js/gravity-force-lab-basics/view/GFLBMassNode.js
+++ b/js/gravity-force-lab-basics/view/GravityForceLabBasicsMassNode.js
@@ -28,7 +28,7 @@ define( function( require ) {
    * @param {Object} [options]
    * @constructor
    */
-  function GFLBMassNode( model, massModel, layoutBounds, modelViewTransform, options ) {
+  function GravityForceLabBasicsMassNode( model, massModel, layoutBounds, modelViewTransform, options ) {
     
     options = _.extend( {
       arrowLabelFill: 'black',
@@ -58,9 +58,9 @@ define( function( require ) {
     ISLCObjectNode.call( this, model, massModel, layoutBounds, modelViewTransform, pullForceRange, options );
   }
 
-  gravityForceLabBasics.register( 'GFLBMassNode', GFLBMassNode );
+  gravityForceLabBasics.register( 'GravityForceLabBasicsMassNode', GravityForceLabBasicsMassNode );
 
-  return inherit( ISLCObjectNode, GFLBMassNode, {
+  return inherit( ISLCObjectNode, GravityForceLabBasicsMassNode, {
 
     /**
      * Redraws the white gradient on the mass objects with their radius.
diff --git a/js/gravity-force-lab-basics/view/GravityForceLabBasicsScreenView.js b/js/gravity-force-lab-basics/view/GravityForceLabBasicsScreenView.js
index 68a5997..cf1c394 100644
--- a/js/gravity-force-lab-basics/view/GravityForceLabBasicsScreenView.js
+++ b/js/gravity-force-lab-basics/view/GravityForceLabBasicsScreenView.js
@@ -13,7 +13,7 @@ define( function( require ) {
   var Bounds2 = require( 'DOT/Bounds2' );
   var Color = require( 'SCENERY/util/Color' );
   var DistanceArrowNode = require( 'GRAVITY_FORCE_LAB_BASICS/gravity-force-lab-basics/view/DistanceArrowNode' );
-  var GFLBMassNode = require( 'GRAVITY_FORCE_LAB_BASICS/gravity-force-lab-basics/view/GFLBMassNode' );
+  var GravityForceLabBasicsMassNode = require( 'GRAVITY_FORCE_LAB_BASICS/gravity-force-lab-basics/view/GravityForceLabBasicsMassNode' );
   var gravityForceLabBasics = require( 'GRAVITY_FORCE_LAB_BASICS/gravityForceLabBasics' );
   var GravityForceLabBasicsConstants = require( 'GRAVITY_FORCE_LAB_BASICS/gravity-force-lab-basics/GravityForceLabBasicsConstants' );
   var HBox = require( 'SCENERY/nodes/HBox' );
@@ -97,7 +97,7 @@ define( function( require ) {
     this.addChild( massControlBox );
 
     // add the mass nodes to the view
-    var mass1Node = new GFLBMassNode( model, model.object1, this.layoutBounds, modelViewTransform, {
+    var mass1Node = new GravityForceLabBasicsMassNode( model, model.object1, this.layoutBounds, modelViewTransform, {
       label: mass1LabelString,
       otherObjectLabel: mass2LabelString,
       defaultDirection: 'left',
@@ -106,7 +106,7 @@ define( function( require ) {
       tandem: tandem.createTandem( 'mass1Node' )
     } );
 
-    var mass2Node = new GFLBMassNode( model, model.object2, this.layoutBounds, modelViewTransform, {
+    var mass2Node = new GravityForceLabBasicsMassNode( model, model.object2, this.layoutBounds, modelViewTransform, {
       label: mass2LabelString,
       otherObjectLabel: mass1LabelString,
       defaultDirection: 'right',