Physical and Chemical Changes Mini Study Guide

Identify each situation as a physical or chemical change

Groups:

(a) Physical

,

(b) Chemical

• bending a paper clip

• mixing baking soda and vinegar to create gas

• digesting food

• evaporating gasoline

• chopping wood

• Cooking an egg

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

• A glass of soda produces bubbles and mak

• Odor Changed

• Souring milk

• Precipitate formed

• Two liquids are mixed and solid forms

• Energy Released

• The clear part of an egg turns white

• Gas released

• Explosion of Dynamite

• Color Changed

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

• souring milk
• breaking a glass
• crumpling a piece of paper

• folding a piece of cloth
• photosynthesis
• digestion of food
• stretching a rubber band
• fermentation of sugar
• reaction of vinegar and baking soda
• Water droplets forming outside a cold can of soda

• burning wood
• explosion of fireworks
• cutting a piece of wood
• bending a metal rod
• boiling water
• melting ice
• rusting iron

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:

• A change that is reversed easily

• Physical Changes

• Examples of Chemical Changes

• Spoiled, Rusting, Burning, Rust

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

• Chemical Changes

• Examples of Physical Changes

• Freezing, Grinding, Chopping, Tearing, Evaporating

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