Bellwork Ps.1.3 and 1.4

A pure substance that cannot be broken down into other substances by chemical or physical means. 

• compound          
• atom
• mixture 
• element

Can a mixture be separated? 

• No
• Yes
• Only sometimes

Tags

NGSS.5-PS1-4

This diagram represents a _____.

• pure substance that is a compound
• mixture of elements
• pure substance that is an element
• mixture of compounds

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• Element
• Compound
• Mixture

Tags

NGSS.MS-PS1-1

Describe this sample

• Pure compound

• Mixture of elements

• Mixture of compounds

• Mixture of elements and compounds

Tags

NGSS.MS-PS1-1

The number to the lower side of an element is a 

• Subscript
• Superscript
• Coefficient
• Charge

The number in front of a compound or element is a 

• Subscript
• Coefficient
• Superscript
• Charge

A chemical reaction is balanced when

• both sides have the same elements
• Both sides have the same  number of atoms
• Same subscripts
• Same coefficients

Tags

NGSS.MS-PS1-5

Which of these is not a chemical reaction?

• Burning of wood
• Milk going bad
• Mixing vinegar and baking soda
• Melting of ice

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The coefficient in  3H₂O is

• 6
• 2
• 3
• 5