Intro Chemical Reactions

What vocabulary word is described by this definition?

 ingredients or starting material for a chemical reaction

Tags

NGSS.MS-PS1-2

What vocabulary word is described by this definition?

what is made during a chemical reaction

Tags

NGSS.MS-PS1-2

Which of the following is evidence of a chemical reaction?

• fizzing

• water changing to ice

• saltwater

• paper being cut in half

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NGSS.MS-PS1-2

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

• The shape of the coal changes

• Oxygen is present

• A new substance is produced

• Coal is made up of more than one element

Tags

NGSS.MS-PS1-2

What are Chemical Reactions?

• It's when you mix substances.

• a process in which atoms rearrange to form new substances

• When something bubbles.

• letter and numbers showing the types and number of atoms

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT evidence that that a chemical reaction has occurred?

• produces light/heat

• production of a gas

• formation of a precipitate

• melting

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

• cutting a piece of paper

• folding a piece of paper

• tearing a piece of paper

• burning a piece of paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scoop of baking soda is added to a beaker containing vinegar. The baking soda disappears and bubbles are observed. This is an example of a _____________ change.

• chemical

• ionic

• phase

• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When mixing 2 or more substances together, evidence that a chemical change occured would NOT include

• producing a gas.

• change in color.

• change in shape.

• change in temperature.

Tags

NGSS.MS-PS1-2

Is a copper penny turning greenish after a few years a chemical or physical change?

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2