Chemical Reactions

A substance that tastes sour, reacts with metals, and turns blue litmus paper RED is considered to be a(n) __________.

• acid 
• base 
• precipitate

A __________is a short, easy way to show a chemical reaction, using symbols

• Chemical Equation
• Chemical change
• Chemical reaction

Tags

NGSS.MS-PS1-5

The Law of Conservation of Mass states that ____________________.

• matter can NOT be created, but can be DESTROYED
• matter can NEITHER be created or destroyed
• matter can be CREATED, but NOT destroyed

Tags

NGSS.MS-PS1-5

A substance that tastes bitter, feels slippery, and turns red litmus paper BLUE is considered to be a(n) __________.

• acid
• precipitate
• base

A chemical reaction is ___________________.

• when substances undergo changes that result in a new substance
• a characteristic of a substance that can be observed without changing the substance into another substance
• when substances undergo changes that alter their form or physical appearance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical change?

• combustion of food
• crushing a soda can
• ice melting

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical change?

• cutting your hair
• burning wood
• boiling water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Select the pair of words that correctly displays the general FORMAT for writing CHEMICAL EQUATIONS.

• products  -->  reactants
• products  -->  products
• reactants  -->  products
• reactants  -->  reactants

Tags

NGSS.MS-PS1-5

What does the ARROW in a Chemical Equation mean?

• "yields"
• "equals"
• "moves over"

The number (mass) of all the atoms on the left side of a chemical equation is ALWAYS the same as the right side of the equation.

• true
• false

Tags

NGSS.MS-PS1-5