SC.8.L.18.4

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

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NGSS.MS-PS1-5

What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?

• They both will weigh the same
• The product always weighs more than the reactant
• The reactant will weigh more than the product
• They both will loose mass after the reaction

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Since gasses weigh nothing, when they are produced in a reaction they do not have to be accounted for.  

• True
• False

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NGSS.MS-PS1-5

Which are chemical changes

• Iron rusting 
• Glass breaking
• Clothing ripping
• Hair cut

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Evidence of a chemical reaction include:

• Phase change
• No new substance
• Bubbles forming
• Shape change

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NGSS.MS-PS1-2

Which energy transformation below matches?
Animals eating food?

• electrical to potential
• chemical to kinetic
• potential to chemical

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NGSS.MS-LS1-7

Which energy transformation below matches?
Burning coal or carbon-based fuel at a powerplant?

• chemical to heat to electrical
• mechanical to chemical to sound
• electrical to chemical to heat

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NGSS.HS-PS1-4

What kind of energy does a wind turbine contain and produce?

• Mechanical and Electrical
• Potential
• Nuclear
• Chemical and Mechanical

What gas is used in photosynthesis to help produce food?

• Sulfur
• Carbon dioxide
• Oxygen
• Nitrogen

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NGSS.MS-LS1-6

Why is sunlight important for the survival of living organisms?

• Sunlight creates fertile soil, which allows plants to release energy to other organisms.
• Sunlight allows decomposers to break down dead organisms, which plants and animals use as energy for photosynthesis.
• Sunlight is needed for plants to produce food, and the energy is then passed to other organisms through food consumption.
• Sunlight increases the amount of oxygen in the air, which is then converted to the carbon dioxide necessary for photosynthesis.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3