Atoms & Elements
Smallest particle of all matter
An atom
Name the main states of matter
Solid, Liquid, Gas, Plasma
Ice melting is an example of what kind of change
Physical
Color, mass, and density are examples of ______ properties.
Physical
Density compares an object’s ____ to its volume.
Mass
The center of an atom is called what
The nucleus
In what state are particles packed tightly together and vibrating
Solid
What type of change is rusting?
Chemical change
The ability to burn is called ______.
Flammability
What does an objects density need to be to float in water?
Less than 1
Which particle of an atom has a negative charge?
Electrons
What state of matter has no definite shape or volume?
Gas
What is it called when gas becomes a liquid again
Condensation
Iron forming rust is a ______ change.
Chemical
How do boats float but small rocks sink?
Because the ship’s overall shape contains air, making its average density less than water, so it floats.
The number of protons represents what
Where is plasma found
Stars, Lightning, Fire
The ability of a substance to dissolve in water is called ______.
Solubility
Two blocks are the same size, but one is heavier. Which has higher density?
The heavier one
What three types of particles make up an atom, and what is the charge of each?
Protons (+), Neutrons (0), Electrons (-)
Describe how the motion and spacing of particles change as a substance goes from a solid to a liquid and then to a gas.
Particles speed up and move apart more and more across each phase
Explain an ice cube turning to a gas and then back to ice again using correct vocabulary.
Name one sign that a chemical change has occurred.
(Any: color change, gas/bubbles, temperature change, precipitate, odor)
How do we calculate density
Density = mass ÷ volume