The Law of Conservation of Mass

A student mixes 125 grams of sugar, 250 grams of water and 5 grams of flavoring. The solution weighs...

• 250 grams

• 375 grams

• 400 grams

• 380 grams

Tags

NGSS.MS-PS1-5

Mass can not be created or destroyed it can only be....

• Destroyed a little

• Transformed

• invisible

• None of the Above

Tags

NGSS.MS-PS1-5

Whats an example of a PHYSICAL change?

• Cutting Paper

• Mixing Vinegar with Baking Soda

• Roasting a marshmallow over a fire

• Rotting apple

What is an example of a CHEMICAL change?

• Melting then refreezing ice

• Burning wood

• Cutting paper

• Melting butter

Tags

NGSS.MS-PS1-2

The Law of Conservation of Mass states that?

• Mass can only be created in a physical change

• Mass can only be created in a chemical change

• Mass can't be created or destroyed

• Mass is different for each chemical reaction

Tags

NGSS.MS-PS1-5

Open or Closed System? A coffee cup with a lid (All matter and energy is locked inside).

• Closed System

• Open System

• This isn't a system

• None of the above

Open or Closed system? Boiling water in a pan with NO lid.

• Closed system

• Open system

• isolated system

• None of the above

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Is this equation balanced or unbalanced? 
H₂ + O₂ --> H₂O

• balanced
• unbalanced

Tags

NGSS.MS-PS1-5

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

If the Reactants have 4 Hydrogen atoms and 2 Oxygen atoms, the products have

• 4 Hydrogen and 4 Oxygen

• 4 Hydrogen and 2 Oxygen

• 6 Hydrogen and 6 Oxygen

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1