Properties of Matter
True or false: any samples of a pure substance (such as water) will have the same physical properties (such as density, boiling point, melting point) regardless of volume.
This is when the atoms or molecules in a substance are organized in a repeating pattern
What is solid?
When thermal energy is increased in a substance, the spacing of the molecules ____________, causing the volume to ______________.
What is the spacing of the molecules increases, causing the volume to increase?
These are indicated by evidence such as color change, formation of a precipitate, temperature change, production of a gas, or production of heat and light.
What are chemical reactions?
This property refers to the amount of matter within a given volume--usually measured in g/cm3.
What is density?
This is when the atoms and molecules in a substance are not organized in a repeating pattern (or are arranged randomly)
What is amorphous?
Atoms and molecules in this state of matter are moving very quickly, are very spread out, and are not attracted to one another.
What is gas?
This is the cause of gas pressure.
What is the force of collisions of the particles on the sides of the container?
True or false: In a chemical reaction, a new substance is produced, meaning that the atoms change into different types of atoms.
This is something that is made of only one type of atom or molecule
What is a pure substance?
This is the science term for two or more atoms bonded together.
What is a molecule?
True or false: Liquid water, ice, and water vapor are all made of different types of molecules.
What is false? They are the same molecule, just moving at different speeds!
When thermal energy of a gas increases, the gas pressure will ___________ because _____________.
What is the gas pressure will increase because the molecules are moving faster and colliding more with the sides of the container?
This is what happens to the amount of matter (mass) in a chemical reaction. (use words like increase, decrease, or stay the same)
What is stays the same?
As volume increases, density does this. (Use words like, increases, decreases, or stays the same)
What is stays the same!
A grain of salt is composed of ____________ molecules organized _____________.
What is millions and billions of molecules organized in a repeating pattern?
Increasing thermal energy will cause the molecules of a substance to move _____________ and their spacing to _____________.
What is move faster, and their spacing will increase?
This is why if you leave a bike outside over the winter, the tires will be flat in spring.
What is because the cold weather causes the molecules of air in the tires to move more slowly and get closer together, decreasing the volume and gas pressure?
In a chemical reaction, the properties of the products (what you end up with) will be _______________ the properties of the reactants (what you start with).
These elements are solid at room temperature, malleable, ductile, and good conductors of heat and electricity. They can be found on the left and middle of the periodic table.
What are metals?
These are the crystals that we eat!
What are ice, salt, sugar, chocolate, and butter?
This is what happens to the temperature of a substance when it boils. (use words like increase, decrease, or stay the same)
What is it stays the same? (When substances are boiling, their temperature remains constant at the boiling point!)
This is the instrument that Mr. K plays.
What is the saxophone?
This is how you can test to see if a chemical reaction has occurred if you are not able to observe one of the five pieces of evidence.
What is you can test the properties of the products and see if they are different from the properties of the reactants?