Chemical reactions

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-PS1-1

NGSS.MS-PS1-2

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

Which is an example of a chemical change?

• Burning wood
• Rust on a car
• Cooking food
• All of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Impure Hydrogen burns with

• pop sound

• blue flame

• pop sound as it contains impurities.

Detonating mixture

• hydrogen --oxygen mixture

• an explosive

• hydrogen --oxygen mixture and is explosive in nature

Hydrogen is colorless and

• combustible

• non combustible

• supports combustion

H₂O is the compound ______.

• Helium
• Gold
• Water

Tags

NGSS.MS-PS1-1