Do Now CA1

A green powder is heated & a gas is given off while it turns to a black solid. This describes

• Physical Change

• Chemical Change

• Change in State

• Change in Temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Identify what type of change happening in the picture below...

• Chemical Change

• Physical Change

• Endothermic Reaction

• Exothermic Reaction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Identify what type of change happening in the picture below...

• Chemical Change

• Physical Change

• Endothermic Reaction

• Exothermic Reaction

Tags

NGSS.MS-PS1-2

What property of metals does the term conductivity describe? (HINT: Think back to 6th grade.)

• reactivity with other elements

• melting & freezing point

• ability to transfer heat and electrcity

• density

Melting Ice Cream

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Rusting Nail

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?

• A chemical reaction produced a solid.
• A chemical reaction produced a gas.
• No chemical reaction took place.
• Only a physical change happened.

Tags

NGSS.MS-PS1-2

Cutting your hair?

• Physical Change
• Chemical Change

Which of the following examples shows that a chemical reaction has occurred? 

• A rock breaks into smaller pieces when it is struck with a hammer.
• Rust forms on a hammer that has been left outside to long. 
• A cup of water turns pink when a few drops of red food coloring are added. 
• A solid is formed when heat is removed from a sample of water. 

Tags

NGSS.MS-PS1-2

The Best Friend's Club uses "invisible ink" to write notes to each other. The invisible ink is actually lemon juice that is clear when it dries on paper, but turns brown when a club member holds a burning candle under the paper. Once it is heated, it is never invisible again.
 What type of change is occurring when the paper is heated?

• chemical change
• elemental change
• physical change
• temperature change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4