Matter
Name the three states of matter.
Solid, liquid, gas.
What has a greater density, a wood brick or a gold brick?
Gold brick.
The three subatomic particles that make up atoms are:
Protons, neutrons, and electrons.
As matter heats up, what happens to its volume?
It increases.
What type of chemical reaction gives off heat?
Exothermic reaction.
Is energy a form of matter?
No. Energy can be observed but does not have volume or mass.
Define the word density.
Density describes the mass of a certain volume of matter, or some description that matches this.
The nucleus of the atom is made of these two subatomic particles:
Protons and neutrons.
As matter cools what happens to its volume? Can you give an example?
It decreases.
What type of chemical reaction cools the substances around it?
Endothermic.
All matter is composed of these.
Atoms.
How does the periodic table reflect density of atoms?
Atoms with higher atomic numbers have more density that atoms with lower atomic numbers.
What is the lightest atom on the periodic table of elements?
Hydrogen.
When we mixed vinegar and baking soda, what gas was emitted? Did this gas have mass?
Carbon Dioxide. Yes.
What kinds of things are made of chemicals?
Everything!
In which state of matter are particles most closely packed together?
Solid.
In which state of matter are particles independent from one another?
Gas
What determines an atom's atomic weight?
The number of protons, neutrons, and electrons it has.
Thermal contraction occurs when
A substance is cooled.
What chemicals when mixed give off heat?
Lots, but let's see what you guys can remember.
In order for something to be matter is must:
How does the temperature of a substance determine its state?
As the temperature of a substance increases, the particles of the substance move faster. This results in state changes from solid to liquid to gas.
How many electrons can an atom have on its first valence shell?
2
Where have the hottest and coldest temperatures in our universe been recorded?
Well...right here on Earth. Unless there are other humans on other planets who use Celsius or something.
Is it a good idea to go mixing a bunch of chemicals to see what happens?
Well...it depends on a lot of things. If the answer given is bad, no points. If the answer given is good. Points.