Physical and Chemical Changes Mini Study Guide

Identify each situation as a physical or chemical change

Groups:

(a) Physical

,

(b) Chemical

• chopping wood

• mixing baking soda and vinegar to create gas

• evaporating gasoline

• Cooking an egg

• digesting food

• bending a paper clip

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following pictures show the breaking and/or forming of a chemical bond?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these are ways in which you can separate the atoms arranged in compounds?

• Physical Change

• Chemical Change

• Filtration

• Evaporation

• Boiling

Match the description of a chemical reaction to the proper sign that a chemical reaction has occurred

• Two liquids are mixed and solid forms

• Odor Changed

• Souring milk

• Precipitate formed

• The clear part of an egg turns white

• Energy Released

• A glass of soda produces bubbles and mak

• Color Changed

• Explosion of Dynamite

• Gas released

Tags

NGSS.MS-PS1-2

An ​ (a)   is a chemical change that ​ (b)   into the surroundings, making things feel warm or hot. In these reactions, energy exits the system as new substances form. Examples include burning wood, fireworks, or rusting metal—all of which give off heat or light. On the other hand, an ​ (c)   is a chemical change that ​ (d)   from the surroundings, making things feel cooler. The reaction needs energy to happen, so it pulls in heat from around it. Examples include baking a cake, photosynthesis in plants, or mixing baking soda and vinegar.

• exothermic reaction
• releases heat
• endothermic reaction
• absorbs heat
• combustion reaction
• nuclear reaction
• physical reaction
• chemical reaction

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Identify each scenario as a chemical or physical change.

Groups:

(a) Physical

,

(b) Chemical

• folding a piece of cloth
• stretching a rubber band
• boiling water
• breaking a glass
• reaction of vinegar and baking soda
• digestion of food
• Water droplets forming outside a cold can of soda

• cutting a piece of wood
• souring milk
• fermentation of sugar
• bending a metal rod
• photosynthesis
• burning wood
• explosion of fireworks
• crumpling a piece of paper

• rusting iron
• melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can you identify the difference between a chemical and physical change and what are signs that a chemical change has occurred?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Any physical or chemical change in a closed system, WHat will happen to the mass?

• The mass will decrease significantly.
• The mass will fluctuate randomly.
• The mass will remain constant.
• The mass will increase over time.
• None of these

Tags

NGSS.MS-PS1-5

Match the following:

• Examples of Physical Changes

• Physical Changes

• changes that cause a substance to change into a new substance

• Chemical Changes

• Examples of Chemical Changes

• Freezing, Grinding, Chopping, Tearing, Evaporating

• A change that is reversed easily

• Spoiled, Rusting, Burning, Rust

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A (a)   modifies the molecular structure and composition of a substance, fundamentally altering its chemical identity. An example would be (b)   .

A (c)   alters only the physical properties of a substance without changing its molecular composition or chemical identity. An example would be (d)   .

• boiling water
• burning wood
• chemical change
• physical change

Tags

NGSS.MS-PS1-2