Diffusion & Conservation of Mass

What is diffusion?

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

molecules move from a 

• high concentarion to low concentartion
• up and down
• left to right
• no movement

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 low concentration of perfume?

• in the bottle
• on the hand
• in the room
• in the top

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

The movement of particles from high concentration to low concentration is called?

• Photosynthesis
• Diffusion
• Osmosis
• Eating

The Law of Conservation of Matter states:

• Matter can be created or destroyed but not transformed 
• Matter cannot be created or destroyed, it can only transformed
• Matter can't be created, destroyed or transformed

According to the Law of Conservation of mass (matter), the amount of matter before and after a reaction must be the same. Which statement below is true?

• The total amount of matter is conserved
• The total amount of matter is less after a reaction
• The total amount of matter is more after a reaction

Can matter be created or destroyed?

• Yes, it can be created.
• Yes, it can be destroyed.
• No, matter is always conserved
• None of these

Tags

NGSS.MS-PS1-5

The mass after a physical change, such as ice melting into water, stays the same

• True
• False