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States of Matter
Changes of State
COS2
Q2
Q3
100
State in which matter has a definite shape and volume. Particles are tightly packed and vibrate in place.
What is a solid.
100
The conversion of a substance from one physical form to another.
What is change of state.
100
The change of state from a gas to a liquid. (ex: Dew happens because of this.)
What is condensation.
100
On a cold day sometimes water molecules in the atmosphere will turn into snow. This phase change is ___________.
What is Freezing.
100
When a substance undergoes a phase change, it still has a definite: a) mass b) shape c) volume d) temperature
What is A - mass.
200
The physical forms in which a substance can exist; states include solid, liquid, and gas.
What are states of matter.
200
The change of state from a solid to a liquid.
What is melting.
200
Vaporization that occurs throughout a liquid. (Think bubbles within a liquid)
What is boiling.
200
Which of the following best describes the particles of a liquid? a) The particles are far apart and moving. b) The particles are close together and sliding past each other. c) The particles are far apart and moving slowly. d) The particles are very closely packed and moving very fast.
What is B - The particles are close together and sliding past each other.
200
Melting points and boiling points are examples of: a) changes of state b) chemical changes c) physical changes d) pressure changes
What is C - physical changes.
300
The state of matter that does not have a definite shape or volume and whose particles have broken apart. (Hint: Found in stars!)
What is plasma.
300
The change of state from a liquid to a solid.
What is freezing.
300
The amount of force exerted on a given area. (Hint: to squash something is to put more of this on it.)
What is pressure.
300
The freezing point of a substance is always _______ as the melting point of that substance. a) lower than b) higher than c) the same as d) it depends on what the substance is.
What is C - The same as.
300
When energy is lost from water it: a) Gets colder b) gets warmer c) must turn to ice d) must turn to steam
What is A - gets colder.
400
The states at which matter takes the shape of the container but has a definite volume.
What is a liquid.
400
Vaporization that occurs at the surface of a liquid below its boiling point. (Ex: a puddle will do this over time.)
What is evaporation.
400
The change of state from a liquid to a gas; includes boiling and evaporation.
What is vaporization.
400
A change from one phase to another involves: a) an addition of heat b) a subtraction of heat c) a change in temperature d) an addition or subtraction of heat
What is D - an addition or subtraction of heat.
400
Phase changes are not associated with a change in: a) heat b) shape c) density d) temperature
What is D - temperature
500
The state in which matter changes both shape and volume. (Hint: Particles are far apart and have lots of energy.)
What is a gas.
500
The change of state from a solid directly into a gas. (Hint: Dry ice does this.)
What is sublimation.
500
A liquid's resistance to flow is known as the liquid's ____________.
What is viscosity.
500
Which of the following contains matter in the plasma state? a) saltwater b) lava c) the northern lights d) All of the above.
What is C - Northern lights.
500
As a substance is changing from a liquid to a gas, the distance between its molecules: a) increases b) decreases c) remains the same d) all of the above.
What is A - increases.