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