Chemistry Part B

Which of the following is a chemical change?

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

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of the following statements is true about the equation in the picture?

• The amounts of atoms on each side are different. 
• CO₂ and 2H₂O, the reactants, are new substances that were formed. 
• CO₂ and 2H₂O, the products, are new substances that were formed. 
• CH4 and 2O2, the reactants, are new substances that were formed. 

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The total amount of matter (atoms) before and after a chemical reaction (change) remains the same.

• True
• False
• Talse
• Frue

Tags

NGSS.MS-PS1-5

Is this equation balanced?

• Yes
• No
• Not enough information

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the law of conservation of matter?

• Matter changes when reacted or changed.
• The mass of all reactants are changed during a physical or chemical change.
• The mass of the reactants is the same as the mass of the products.
• The mass of the products is different than the mass of the reactants.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Will the reactants or products have more mass during and after a chemical reaction?  

• 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 lose mass after the reaction.

Tags

NGSS.MS-PS1-5

Which chemical equation is balanced?

• CH₄+O₂------CO₂+2H₂O
• H₂+O₂-----2H₂O₄
• 4Al+3O₂-----2Al₂O₃

Tags

NGSS.MS-PS1-5

Which of the following is evidence of a chemical change?  

• Change in state
• No new substance is formed
• Bubbles forming
• Change in shape

Tags

NGSS.MS-PS1-2

Which of the following is evidence of a physical change?  

• New substances formed
• Heat produced
• Change in state
• Change in color

How is a physical change different from a chemical change?

• There is absolutely no difference
• Chemical changes produce a new substance, physical changes do not
• Chemical changes create and destroy matter, physical changes don't
• Physical changes create and destroy matter, chemical changes dont

Tags

NGSS.MS-PS1-4