Chemical And Physical Reactions Question Preview (ID: 60543)


What Is The Difference Between Physical And Chemical Changes? TEACHERS: click here for quick copy question ID numbers.

A reaction occurs in a beaker of fluid, and a white substance settles to the bottom. This precipitate is evidence that what process has occurred?
a) Chemical Reaction
b) Gas Exchange
c) Heat Exchange
d) Physical Change

Which example shows a change in a state of matter?
a) Liquid pouring
b) Wood Burning
c) Nail rusting
d) Ice melting

Which process BEST illustrates elements combing to make a new compound?
a) Melting a solid to make a liquid
b) Boiling a liquid to make steam
c) Cutting a solid to make more parts
d) Mixing two liquids to make a solid

Two basic types of changes occur in chemistry: physical and chemical. Which examples represents a chemical change?
a) food spoiling
b) shredding paper
c) melting ice cream
d) breaking glass

Which example indicates a chemical reaction occurred?
a) Wax melted
b) nails rusted
c) sugar dissolved
d) water boiled

Matter can undergo both chemical and physical changes. What indicates that the change was definitely chemical?
a) The temperature changed
b) A precipitate formed
c) The color changed
d) A gas formed

Which example shows a physical change taking place?
a) Heat is given off
b) The substance melts
c) A new substance is produced
d) A precipitate is formed

What would the breaking up of a large rock into small rocks be considered?
a) Chemical property
b) Chemical reaction
c) physical change
d) physical property

Which is an example of a physical change?
a) Iron turns to reddish-brown as it rusts
b) Water boils and creates bubbles and gas vapor
c) Carbon dioxide combines with limewater and produces chalk
d) Wood burns to ash and gases

Which is an example of a chemical change?
a) cutting paper
b) combustion
c) Boiling
d) Melting

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