Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Tags

NGSS.MS-PS1-5

The small number to the lower side of an element is a

• Subscript

• Superscript

• Coefficient

• Charge

The large number in front of a compound or element is a

• Subscript

• Coefficient

• Superscript

• Charge

What is the coefficient in compound 8H₆O?

• 6

• 2

• 8

• 48

Tags

NGSS.MS-PS1-1

If reaction starts with 20g of reactants then how much product should produced

• a total of 40g of products

• a total of 10g of products

• a total of 80 g of products

• a total of 20g of products

Tags

NGSS.MS-PS1-5

In a reaction A + B ----> C,  reactant A has 10g and product C has 32g. How many grams does reactant B should have? 

• 22g

• 5g
• 9g
• 14g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the measure of the amount of matter in a subsance?

• mass
• size

• pounds

• density

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change.

• disappears
• stays the same
• weighs less
• explodes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

• 15 grams
• 25 grams
• 20 grams

Tags

NGSS.HS-PS1-7