⚖️ Conservation of Matter
This quiz explores the fundamental principle of conservation of matter: the idea that matter is never created or destroyed, only transformed into different states or forms. You'll investigate how mass remains constant during melting, freezing, burning, and other changes, and learn how particle theory explains why this happens. Through real-world experiments and evidence, discover why the total amount of matter—measured in grams—stays the same before and after physical and chemical changes. **What you'll learn:** - Matter cannot be created or destroyed, only changed in form or state - Mass is conserved during physical changes (melting, freezing, evaporation) - Mass is conserved during chemical changes (burning, rusting, dissolving) - How particle theory explains conservation of matter - How to use evidence from experiments to identify conservation of matter
Questions in this quiz
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- Question 1
A student heats 100 grams of ice until it becomes water. What is the mass of the water after the ice has completely melted?
- Question 2
When a candle burns, the wax completely disappears and the mass of the system decreases because matter is destroyed in the fire.
- Question 3
A 200-gram block of metal is heated and expands slightly. According to the principle of conservation of matter, what is the mass of the expanded metal block?
- Question 4
In a controlled experiment, a teacher burns 10 grams of wood in a sealed container and measures all the products. Which outcome would demonstrate conservation of matter?
- Question 5
When sugar dissolves in water, the sugar particles disappear and are no longer part of the sugar-water mixture.
- Question 6
According to particle theory, why does the mass remain the same when ice melts into water?
- Question 7
A student heats water in an open beaker on a hot plate. After 30 minutes, the water level has decreased noticeably. Has the mass of matter been destroyed?
- Question 8
The principle of conservation of matter applies only to physical changes like melting and freezing, not to chemical changes like burning.
- Question 9
A piece of steel wool (50 grams) is burned in an open flame and turns to rust and ash. A student observes that the remaining solid material weighs 72 grams. How can this apparent increase in mass be explained?
- Question 10
Which of the following observations best demonstrates conservation of matter during a physical change?
- Question 11
If you measure the mass of a balloon filled with helium gas, the total mass equals the mass of the balloon material plus the mass of the helium gas inside it.
- Question 12
A student dissolves 30 grams of salt in 170 grams of water to make a salt-water solution. What is the total mass of the salt-water solution?
- Question 13
A sealed aluminum can contains 355 grams of liquid soda. If the soda is poured out into a glass, what can you conclude about the mass of the soda in the glass?
- Question 14
During photosynthesis, plants convert light energy and gases into solid matter (plant tissue), which means new matter is created and the principle of conservation of matter does not apply.
- Question 15
A student performs an experiment heating 80 grams of ice in a sealed, transparent container until it becomes water, then continues heating until steam forms. If all the steam remains captured in the sealed container, what is the total mass of all the matter in the container at the end?