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The center core of an atom is called the ___________.
nucleus
A subatomic particle having a positive charge is the _______________.
proton
What state of matter has a definite volume but takes the shape of its container?
liquid
Elements that display some properties of both metals and nonmetals are called ______________.
metalloids
The number of protons in an atom is called the __________________.
atomic number
A particle that moves around the nucleus creating a cloud of negative charge is a(n) _____________.
electron
The forces of attraction between the particles of a matter sample are strong and draw particles together, keeping them in their place. This is an example _____.
solid
A change in the state of matter occurs if enough _____ is added or removed from an object.
thermal energy
In general, metals are ____ (good / poor) conductors of heat since they are composed of individual atoms or small molecules.
good
Particles are generally far apart and moving freely in a _______. (solid, liquid, gas)
gas
Particles are close together and vibrating in place in a _______. (solid, liquid, gas)
solid
Water has been left in a pot on a hot stove. Bubbles form throughout the liquid and rise to the top. Which type of change is this?
boiling (vaporization)
Temperature is a measure of the average ____ of the particles in an object.
kinetic energy
When temperature increases, average _____ increases.
kinetic energy
Heat always moves from ___________ to __________ objects.
warmer to cooler
The pool is cold at the beginning of summer because water has a (high/ low) specific heat.
high
