States of Matter
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Preview questions (no answers)
- 1.
In the Particle Theory, which of the following is NOT a main idea?
A.Matter is made of tiny particles
B.Particles are always moving
C.Particles grow larger when they get hot
D.There are spaces between particles
- 2.
What is 'dry ice' (solid carbon dioxide) known for doing at room temperature?
A.Melting into a liquid
B.Freezing more water
C.Subliming into a gas
D.Condensing into a liquid
- 3.
What happens to the total mass of a substance when it melts?
A.The mass increases
B.The mass decreases
C.The mass stays the same
D.The mass becomes zero
- 4.
Which of these contains particles with the most kinetic energy?
A.An ice cube
B.A glass of room temperature water
C.A cloud of steam
D.A bowl of cold soup
- 5.
A scientist pumps additional air into a bicycle tire. According to the particle theory, why does the air pressure inside the tire increase even though the temperature remains the same?
A.The individual air particles expand in size to fill the tire more tightly.
B.There are more particles available to collide with the inner walls of the tire.
C.The particles begin to move much faster because they are crowded together.
D.The attractive forces between the particles pull them closer to the center of the tire.
- 6.
In terms of particle theory, why can you walk through air but not through a brick wall?
A.Air particles are much softer than brick particles.
B.Brick particles are too small to see, so you can't find a way through.
C.Air particles are far apart with lots of empty space between them, while brick particles are tightly packed and held by strong forces.
D.Brick particles are electrically charged to repel humans.
- 7.
Why does a balloon pop if you leave it in a hot car?
A.The rubber of the balloon melts.
B.The air particles inside move faster and hit the inside of the balloon with more force, increasing pressure until it bursts.
C.The air particles inside the balloon multiply when they are heated.
D.The outside air pressure becomes zero, causing the balloon to expand.
- 8.
A chef is reducing a sauce by boiling it. Based on Particle Theory, what is happening to the concentration of the non-water ingredients?
A.It decreases because everything is evaporating.
B.It increases because water particles are escaping as steam, while the other particles remain in the pot.
C.It stays the same because nothing leaves the pot.
D.It increases because the heat creates more sauce particles.
- 9.
In which state of matter are the attractive forces between particles effectively zero or negligible?
A.Solid
B.Liquid
C.Gas
D.Crystal
- 10.
Which of the following is NOT a fundamental assumption of the Kinetic Particle Theory?
A.All matter is made up of tiny particles.
B.Particles are in constant, random motion.
C.Particles in a solid are larger than particles in a gas.
D.There are spaces between particles.
Download the worksheet for States of Matter - Particle Theory to practice offline. It includes additional chapter-level practice questions.
Solids, Liquids, and Gases
SubtopicSolids, Liquids, and Gases under States of Matter for Grade 6 IB.
Preview questions (no answers)
- 1.
Which of these is the best example of a gas?
A.Honey
B.Smoke
C.Sand
D.Nitrogen
- 2.
When a solid is heated, its particles usually:
A.Move closer together
B.Vibrate faster
C.Stop moving
D.Shrink in size
- 3.
Which state of matter is characterized by having a fixed volume but taking the shape of the bottom of its container?
A.Solid
B.Liquid
C.Gas
D.Vapor
- 4.
What does 'volume' mean in science?
A.How heavy something is
B.The amount of space an object takes up
C.How fast particles move
D.How loud a sound is
- 5.
If the temperature of a liquid is increased, what happens to the rate of diffusion within that liquid?
A.It stays the same.
B.It decreases because particles move slower.
C.It increases because particles have more kinetic energy and move faster.
D.Diffusion stops completely at high temperatures.
- 6.
Which of the following is NOT a property of a gas?
A.It can be compressed.
B.It has a fixed shape.
C.It can flow.
D.It fills the entire volume of its container.
- 7.
Which of these substances is most likely to be a gas at room temperature?
A.A substance with a boiling point of .
B.A substance with a melting point of .
C.A substance with a boiling point of .
D.A substance with a freezing point of .
- 8.
Which process involves the greatest increase in the distance between particles?
A.Melting
B.Freezing
C.Condensation
D.Boiling
- 9.
Why can gases flow easily, similar to liquids?
A.Because their particles are not held in fixed positions and can move past one another.
B.Because gas particles are more slippery than solid particles.
C.Because gases are affected by the Earth's rotation more than solids.
D.Because gas particles are connected by long, invisible strings.
- 10.
Which state of matter has a definite volume but no definite shape?
A.Solid
B.Liquid
C.Gas
D.Plasma
Download the worksheet for States of Matter - Solids, Liquids, and Gases to practice offline. It includes additional chapter-level practice questions.
Changes of State (Melting, Freezing, Evaporation)
SubtopicChanges of State (Melting, Freezing, Evaporation) under States of Matter for Grade 6 IB.
Preview questions (no answers)
- 1.
When you boil a kettle, the level of the liquid water inside goes down over time. Why?
A.The water is freezing
B.The water is turning into a gas
C.The water is turning into a solid
D.The water is being created
- 2.
What happens to a snowman when the sun comes out and the temperature rises above ?
A.It evaporates immediately
B.It freezes more
C.It melts
D.It stays the same
- 3.
In the sequence shown in the diagram, what is the state of matter at point C?
A.Solid
B.Gas
C.Liquid
D.Ice
- 4.
Molten rock (lava) that flows out of a volcano eventually turns into hard, solid basalt. This process is:
A.Freezing
B.Melting
C.Evaporation
D.Condensation
- 5.
Which of these best represents the cycle of water as it relates to melting and freezing in nature?
A.Glaciers melting in summer and refreezing in winter.
B.Rain falling from the clouds and soaking into the ground.
C.Plants taking in water through their roots.
D.Salt dissolving in the ocean.
- 6.
In a closed container, why does the water level stop dropping even though evaporation is occurring?
A.Evaporation stops because the air is full of water vapor (saturated).
B.The water particles have all been used up.
C.The particles are too tired to evaporate.
D.The pressure of the lid prevents any particles from moving.
- 7.
If you increase the temperature of a liquid, how does this affect the rate of evaporation?
A.It decreases the rate because particles become heavier.
B.It has no effect on the rate of evaporation.
C.It increases the rate because more particles have the energy to escape the surface.
D.It stops evaporation and starts freezing instead.
- 8.
What happens to the vibration of particles in a solid as it is cooled toward absolute zero?
A.The vibrations increase in speed.
B.The vibrations decrease until they almost stop.
C.The particles start moving in circles.
D.The particles expand and push each other away.
- 9.
In a closed system, of water evaporates and then condenses back into a liquid. What is the total mass of the water at the end of the experiment?
A.B.C.D. - 10.
Which of the following is a key difference between melting and freezing for a pure substance?
A.They occur at different temperatures for the same substance.
B.Melting is an endothermic process, while freezing is an exothermic process.
C.Melting creates a new substance, while freezing does not.
D.Freezing requires a vacuum, while melting requires air.
Download the worksheet for States of Matter - Changes of State (Melting, Freezing, Evaporation) to practice offline. It includes additional chapter-level practice questions.
Physical vs. Chemical Changes
SubtopicPhysical vs. Chemical Changes under States of Matter for Grade 6 IB.
Preview questions (no answers)
- 1.
What is the best way to describe a physical change?
A.A change that creates a new type of matter
B.A change in form or state without changing the identity
C.A change that always involves fire
D.A change that only happens to solids
- 2.
Which change can be easily reversed by cooling or heating?
A.Burning a log
B.Frying a steak
C.Melting an iron bar
D.Souring of milk
- 3.
In which state of matter are the particles most organized?
A.Gas
B.Liquid
C.Solid
D.Steam
- 4.
When a piece of paper is lit with a match, the resulting ash and smoke are:
A.The same substance as the paper
B.Different substances than the paper
C.Liquid versions of the paper
D.The paper in a frozen state
- 5.
A student investigates two different types of hand warmers. In Process A, iron powder reacts with oxygen to form a new reddish-brown substance called iron oxide. In Process B, a liquid solution turns into solid crystals, which releases heat but can be turned back into a liquid by boiling it in water. Based on the diagram and descriptions, how should these processes be classified?
A.Process A is a physical change because iron is a solid metal; Process B is a chemical change because heat is released.
B.Both processes represent chemical changes because they both result in a change of temperature and appearance.
C.Process A is a chemical change because a new substance is formed; Process B is a physical change because it is a reversible change of state.
D.Both processes represent physical changes because the total number of atoms remains the same during the reaction.
- 6.
When fireworks explode, they produce light, sound, and a change in color. These are all indicators of:
A.A physical change due to high pressure.
B.A chemical change because new substances are formed and energy is released.
C.A change of state from solid to liquid.
D.A physical change because the pieces are spread out.
- 7.
A student observes a clear liquid being heated. At , the liquid begins to bubble vigorously and turn into an invisible gas. This is a:
A.Chemical change because bubbles were formed.
B.Physical change because it is a change of state (boiling).
C.Chemical change because the liquid disappeared.
D.Physical change because the temperature reached .
- 8.
Which of these processes is considered a chemical change in the context of the Carbon Cycle?
A.Carbon dioxide dissolving in ocean water.
B.Plants using sunlight to turn carbon dioxide and water into glucose.
C.The movement of carbon-rich sediments by ocean currents.
D.Ice caps melting and releasing trapped methane gas.
- 9.
In the 'Thermite Reaction', aluminum powder and iron oxide react to produce liquid iron and aluminum oxide, releasing a massive amount of heat. Which classification is correct?
A.Physical change because the iron became liquid.
B.Exothermic chemical change because new substances were formed and heat was released.
C.Endothermic physical change because heat was required to start it.
D.Chemical change because the mass of the products is greater than the reactants.
- 10.
If a substance undergoes a change where it transitions from a liquid to a gas at a temperature below its boiling point, what is this process called?
A.Boiling
B.Evaporation
C.Sublimation
D.Condensation
Download the worksheet for States of Matter - Physical vs. Chemical Changes to practice offline. It includes additional chapter-level practice questions.