Matter Conservations Matters Quick Check
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Question
A young snake eats and digests a mouse. The increase in the snake’s mass equals(1 point)
Responses
the mass of the mouse minus the mass of waste produced by the snake.
only the mass of the mouse
the mass of the mouse plus the mass of waste produced by the snake.
the mass of the mouse plus the original mass of the snake.
3 answers
the mass of the mouse plus the mass of waste produced by the snake.
Which change is chemical?
A. water freezing: liquid water becoming solid water
B. water evaporating: liquid water becoming gaseous water
C. water boiling: solid water becoming gaseous water
D. water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules <-- ✅
Which number remains unchanged during photosynthesis?
A. the number of carbon atoms <-- ✅
B. the number of carbon dioxide molecules
C. the number of glucose molecules
D. the number of water molecules
In a chemical reaction, which aspect of the reactants changes?
A. name of each element
B. nuclei
C. arrangement of the atoms <-- ✅
D. total mass
A young snake eats and digests a mouse. The increase in the snake’s mass equals
A. the mass of the mouse minus the mass of waste produced by the snake. <-- ✅
B. only the mass of the mouse
C. the mass of the mouse plus the mass of waste produced by the snake.
D. the mass of the mouse plus the original mass of the snake.
Cellular respiration transforms glucose and oxygen into carbon dioxide, water, and energy.
C6H12O6 + 6O2 → 6CO2 + ?H2O + Energy
Based on the law of conservation of matter, what is the missing coefficient for water?
6 <-- ✅
2
8
4
1. D
2. A
3. C
4. A
5. A
A. water freezing: liquid water becoming solid water
B. water evaporating: liquid water becoming gaseous water
C. water boiling: solid water becoming gaseous water
D. water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules <-- ✅
Which number remains unchanged during photosynthesis?
A. the number of carbon atoms <-- ✅
B. the number of carbon dioxide molecules
C. the number of glucose molecules
D. the number of water molecules
In a chemical reaction, which aspect of the reactants changes?
A. name of each element
B. nuclei
C. arrangement of the atoms <-- ✅
D. total mass
A young snake eats and digests a mouse. The increase in the snake’s mass equals
A. the mass of the mouse minus the mass of waste produced by the snake. <-- ✅
B. only the mass of the mouse
C. the mass of the mouse plus the mass of waste produced by the snake.
D. the mass of the mouse plus the original mass of the snake.
Cellular respiration transforms glucose and oxygen into carbon dioxide, water, and energy.
C6H12O6 + 6O2 → 6CO2 + ?H2O + Energy
Based on the law of conservation of matter, what is the missing coefficient for water?
6 <-- ✅
2
8
4
1. D
2. A
3. C
4. A
5. A
Their order isn’t correct but the actual answers are
1 answer