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Unit 1 Mod 2 Lessons 2-3
Test Description: Property Changes in Chemical Reactions Energy Changes in Chemical Reactions
Instructions: Answer all questions to get your test result.
1) A chemical change occurs when matter changes into other substances with
A
different physical properties
B
different chemical and physical properties
C
different chemical properties
D
is used in an experiment
2) If Ava dyes a t-shirt, this is a
A
physical change
B
chemical and physical change
C
chemical change
D
wardrobe change
3) Which of the following is NOT an indication of a chemical change?
A
Mixing rock salt with ice in an ice cream maker to lower the temperature
B
Accidentally leaving a popsicle on the counter and finding a puddle instead of the popsicle
C
When baking soda and vinegar are mixed, gas bubbles form.
D
Mrs. Landreth breaking a glow stick so she can see in the dark
4) When leaves change color in the fall, this is an example of a __________change
A
wardrobe
B
chemical
C
state of matter
D
physical
5) Which scientist discovered the law of conservation of mass?
A
Jacques Charles
B
Robert Boyle
C
Antoine Lavoisier
D
Isaac Newton
6) When exposure to water and the atmosphere changes the composition of rocks and minerals, this is called
A
erosion
B
decomposition
C
physical weathering
D
chemical weathering
7) In a chemical equation, these are to the left of the arrow.
A
solids
B
products
C
reactants
D
equals sign
8) In a chemical equation, these are to the right of the arrow
A
equals sign
B
products
C
reactants
D
solids
9) These describe the number of atoms of an element in a compound
A
coeffiecient
B
superscript
C
subscript
D
variable
10) The number in front of the element symbol or chemical formula. For example, the two in 2(CO)
A
variable
B
superscript
C
coefficient
D
subscript
11) The _________energy particles have, the more they move and ___________ with each other.
A
less, cool
B
more, collide
C
more, cool
D
less, collide
12) _____________chemical bonds requires energy
A
breaking
B
bending
C
jumping
D
forming
13) _____________chemical bonds releases energy
A
jumping
B
bending
C
forming
D
breaking
14) In a ________________chemical reaction, MORE energy is required on the reactants side than is released on the products side
A
exothermic
B
elemental
C
endothermic
D
exoskeletal
15) In a ________________chemical reaction, LESS energy is required on the reactants side than is released on the products side
A
elemental
B
exoskeletal
C
endothermic
D
exothermic
16) Which of the following is an example fo an endothermic reaction?
A
a bonfire
B
using HOT HANDS to warm your hands when hunting
C
burning a candle
D
cooking a pizza
17) The ____________________________ states that even though energy is always transferring, energy is not created or destroyed.
A
Law of Conservation of Energy
B
Landreth's Law of the Land
C
Law of Conservation of Mass
D
Law of Conservation of Coffee
*select an answer for all questions
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