Chemical Reactions

True or False

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

• true

• false

• maybe

Tags

NGSS.MS-PS1-5

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 change no new substance is formed
• The change can be seen but in a physical change it cannot

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The left side of the equation below is called

• Products

• Reactants

• Chemicals

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The right side of the equation below is called the

• Products

• Reactants

• Chemicals

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement is not a description of a chemical reaction?

• A solid is dropped into a beaker of liquid and a gas is released.
• Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
• A solid is dropped into a beaker of liquid and an explosion occurs.
• A liquid is heated in the sun and half of it evaporates.

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

In a chemical reaction

• The atoms of the reactants always stay together to form the products
• The atoms of the reactants unbond, rearrange, and then rebond to form the products
• New atoms are formed which combine to make the products
• Some atoms disappear while others multiply to form the products

Tags

NGSS.MS-PS1-5

Which is an example of a chemical reaction?

• Putting Alka-Seltzer in water

• Opening a bottle of Sprite

• Opening a bottle of Carbonated Water

Tags

NGSS.MS-PS1-2