The Law of Conservation of Mass

In an isolated system, matter can neither be created or destroyed.

• true

• false

Tags

NGSS.MS-PS1-5

To the best of our knowledge, the universe is a closed system.

• false

• true

When we represent a chemical reaction in this way, it is called a ............................equation

• hard

• short

• word

• unbalanced

In a word equation for a chemical reaction, the reactants are to the.....................of the arrow.

In a word equation for a chemical reaction, the products are to the.......................of the arrow.

Name one of the reactants in this reaction.

• vinegar

• H₂O

• water

• carbon dioxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Name one of the products in this reaction

• Baking Soda

• Vinegar

• Water

• NaHCO₃

Tags

NGSS.MS-PS1-2

Which Theory explains where the very first atoms are thought to have come from?

• Cosmic Theory

• Flat Earth Theory

• Theory of evolution

• Big Bang Theory

Tags

NGSS.HS-ESS1-2

Energy released in a chemical reaction can be released as

• heat

• light

• energised particles

• all of the above

Tags

NGSS.HS-PS1-4

In a closed system, the mass of the reactants is equal to the mass of the products

• false

• true

Tags

NGSS.MS-PS1-5