Chemistry Review : 7th grade science

The substances listed on the right side of a chemical equation are the

• Yields
• Reactants
• Products
• Precipitates

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Tags

NGSS.MS-PS1-5

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.
  

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

• 2
• 16
• 8
• 5

Tags

NGSS.MS-PS1-1

A molecule is________

• a glob of gelatinous goo
• smaller than an atom
• filled with raisons
• more than one atom bonded together

Tags

NGSS.MS-PS1-1

Which is the Law of Conservation of Matter?

• matter cannot be created or destroyed, it only changes form
• matter can be created but it cannot be destroyed, it never changes form
• matter can be destroyed but it cannot be created, it usually just changes form
• matter is an unproven theory created by Hans Geiger

Tags

NGSS.MS-PS1-5