Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download File - Githens Jaguars
Document related concepts
no text concepts found
Transcript
DENSITY and Which is heavier… A basketball? Or a bowling ball? Which is heavier… A metal block? Or a styrofoam block of the same size? Size Doesn’t Matter! • Objects that are the same size could have very different masses! • All materials are made of small particles called molecules… DENSITY • The molecules in different objects are arranged differently. They may be closely packed, like in a heavy metal block… DENSITY • The molecules in different objects are arranged differently. Or they could be spaced out, like in a styrofoam block. DENSITY • DENSITY describes how closely packed the particles of an object are. HIGH density LOW density How does this relate to air? • We know that air has mass… Which means that air is also made of molecules. Air molecules are spread very far apart compared to molecules in a solid, like metal. How does this relate to air? • Even though air molecules are spread far apart, the air in our atmosphere stretches up over 60 miles! • The air above your head actually weighs about as much as a school bus! It doesn’t crush you, though, because it is pushing on all sides. How does this relate to air? • This pushing of air is called AIR PRESSURE. • You felt PRESSURE when you were crammed into the tape square. ………… .………… . . . . ………… ………… .………… . . . . Air Air at at HIGH LOW ………… ………… .………… . . . . DENSITY also has ………… .………… . . . . ………… HIGH LOW PRESSURE PRESSURE ………… .………… . . . .
