States of Matter
Particles clustered close together and vibrate only, lowest kinetic energy (KE).
What is a solid?
This is a unique substance chemically and physically, they are grouped into metals, nonmetals and metalloids, and there are 118 of these on the periodic table.
What is an element?
This is one specific atom or molecule of some substance that has unique chemical and physical properties. No other different atoms or molecules are present within it.
What is a pure substance?
This value is found when we divide mass by volume. It is the measure of how much "stuff" is in a given space.
What is density?
A piece of paper gets cut by a pair of scissors. This is an example of a _____________ change.
What is physical?
The change of state from a solid to a liquid when a substance is heated.
What is melting?
There are more of these on the periodic table than any other family of elements. They are good conductors, are malleable and ductile, and are usually very shiny.
What are metals?
This is a substance that cannot be separated by physical means. It is the same throughout the mixture. Examples might include sweet tea or milk.
What is a homogenous mixture?
A ping pong ball floats on vegetable oil because the ping pong ball is __________ dense than the oil.
What is less?
One type of change can be undone physically, but another cannot. Which type of change cannot be undone physically?
What is a chemical change?
What is a liquid?
These elements are dull, brittle and are poor conductors of electricity and heat.
What are nonmetals?
This is a substance that looks visibly different and can be separated by physical means. Examples might include beach sand and salad.
What is a heterogenous mixture?
A density column is sitting on the middle of a science table. The top layer is water, the middle layer is corn syrup and the bottom layer is honey. The most dense layer in this column is ___________.
What is honey?
An unknown clear liquid is poured into another clear liquid. After a few seconds, the entire mixture turns a deep purple color. This is an example of a _________ change.
What is chemical?
The change of state from a liquid to a gas when a substance is heated up.
What is boiling?
This is a semiconductor, often is shiny but also is very brittle.
What is a metalloid?
Kailey's uncle walks into a store and orders a few helium balloons for her party. The clerk uses helium from the tank to blow up the balloons. No other substances are present in the tank. What is the substance in the tank classified as?
What is a pure substance?
A cherry tomato sinks in a density column. It sinks under the vegetable oil and the water layer, but floats on the corn syrup layer underneath the water. The cherry tomato is ______ dense than the water, but _____ dense than the corn syrup.
What is more and less?
A student crumples up a piece of paper and shoots it at the trash can. He misses the trash can and the paper accidentally lands on a hot plate in lab and burns to ashes. The crumpled paper is a ____________ change, and the burned paper is a ___________ change.
What is physical and chemical?
This state of matter has no definite shape or volume, and has a high amount of kinetic energy (KE). It will expand to fill up whatever space it is in.
What is a gas?
A scientist inspects an unknown substance. It is shiny, but breaks when she hits it with a hammer. When she puts it in a circuit with a battery and a light bulb, the light bulb glows, but not very brightly.
What is a metalloid?
Sally sits down to dinner and looks at her drink glass. Her mom hands her a bowl of chili and beans, her favorite! What kind of substance would the chili and beans be?
What is a heterogenous mixture?
A lava lamp works using density. The bottom of the lamp is hot, which warms up the lava blobs as they sit on the bottom. When it gets less dense than the oil it is in, the hot lava blobs rise to the top of the lamp and cool off. The lava blobs ________ on the surface of the oil over time and then sink back down to the bottom.
What is cool off, or get colder?
When two clear liquids are mixed, a layer of yellow chunks are created and sink to the bottom of the flask. These chunks are called a ____________, and it is an example of a _________ change.
What is precipitate and chemical?