6th Grade Review Question Preview (ID: 46519)
Physical And Chemical Changes And Endo/exothermic Reactions.
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Need a continuous energy source
a) endothermic reaction
b) exothermic reaction
c)
d)
leaves surroundings feeling cold
a) exothermic reaction
b) endothermic reaction
c)
d)
more energy needed to break bonds of reactants than is released
a) endothermic
b) exothermic
c)
d)
some energy is released as light
a) exothermic
b) endothermic
c)
d)
energy released is greater than energy needed to break bonds
a) endothermic
b) exothermic
c)
d)
some energy released as heat
a) exothermic
b) endothermic
c)
d)
cutting paper is an example of a
a) physical change
b) chemical change
c)
d)
bending metal is an example of
a) chemical change
b) physical change
c)
d)
an example of a physical change is
a) burning wood
b) cooking an egg
c) cracking a glowstick
d) crushing a coke can
an example of a chemical change
a) chewing food
b) rust
c) slicing an apple
d) melting ice
breaking chemical bonds means a ____________ change has occurred
a) physical changes
b) chemical changes
c)
d)
all changes of state are
a) chemical
b) physical
c)
d)
forming new bonds means a _____________change has occurred
a) physical
b) chemical
c)
d)
water turning to steam is a
a) physical change
b) chemical change
c)
d)
chemical changes form
a) changes of state
b) new substances
c) old substances
d)
The BEST way to know a chemical change occurred
a) color change
b) bubble form
c) no reaction occurs
d) a new substance forms
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