5.4 All chemistry

The random jerky motion of particles first observed by Robert Brown

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

What does “high concentration area” mean?

• Spread out
• Tightly packed together
• Uncrowded
• Spacious

Where is there a low concentration of dye?

• at the bottom of cup
• in the color
• at the top of cup 
• no concenteraion gradient

Where is there a high concentration of water?

• in the flower
• cannot be determined by picture.
• in the vase
• in the leaves

How do gases behave in a container?

• Cluster together
• form a solid
• They take the shape of their container
• leak out 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which description best matches this particle model?

• Closely packed and can't move a lot. 
• Particles are close together but can move a little. 
• Particles have lots of energy and can move around. 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

Tags

NGSS.MS-PS1-4

A state of matter in which the particles of the substance are tightly packed and vibrating.

What state of matter has a definite shape and a definite volume?