Chemical Reactions

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

Tags

NGSS.MS-PS1-2

True or False
In a chemical reaction, no new atoms are created, and no atoms are destroyed. 

• true
• false

Tags

NGSS.MS-PS1-5

The left side of the equation below is called

• Products
• Reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

The right side of the equation below is called the

• products
• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT a sign of a chemical reaction? 

• Color changes
• Cutting into fourths
• Light is produced
• Gas is formed

Tags

NGSS.MS-PS1-2

A substance that is formed as the result of a chemical reaction is a __________________

• Product

• Reactant

• Starters

• Enders

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change in the shape of an object is an example of _________________.

• a chemical change

• energy

• an endothermic change

• a physical change

During a chemical reaction, atoms ____________ to form new substances.

• Change

• Switch

• Turn into new atoms

• Rearrange

Tags

NGSS.MS-PS1-2

We know these are different substances because they have different:

• Sizes

• Properties

• Atoms

• Tastes

Tags

NGSS.MS-PS1-2

Will these two substances have different properties?

• Yes, because they have different groups of atoms

• Yes, because there are more of sample 2

• No, but they both have 2 atoms in each molecule

• No, because they both have purple atoms

Tags

NGSS.MS-PS1-1