Matter 1
What are the three states of matter?
Solid, Liquid, and Gas
What is a solid form of water?
What is a gaseous form of water?
Ice and Steam
What is a pure substance?
a substance composed of only one type of atom or molecule.
Define Energy.
"Energy is the capacity to do work"
What's a physical change?
changes affecting the form of a chemical substance, but not its chemical composition.
Which state of matter is compressible?
Gas
Gasses are compressible because the atoms or molecules that form gas are not in contact one another, they move freely.
Which state of matter assumes the shape of their containers?
Liquids
Liquids assume the shape of their container because the atoms or molecules are free to move relative to one another
Define a mixture
A mixture is composed of two or more different types of atoms or molecules combined in variable proportions.
What is the SI unit for energy?
Joules (J)
Define exothermic
a reaction in which heat energy is given off.
Ex) Combustion
What is Matter?
Matter is defined as anything that occupies space and has mass.
What is an amorphous solid?
Atoms or molecules that do not have
long-range order.
Is an element a pure substance?
An element is a pure substance because an element is only made of one type of molecule. An example of this would be gold, silver, or mercury
How many joules are in one calorie (c)
4.184 joules (J)
Define Endothermic
A chemical reaction that absorbs heat.
Ex) sweating
What is a crystalline solid?
Atoms or molecules are arranged in
geometric patterns with long-range, repeating order.
How are we able to see submicroscopic particles like protons, neutrons, and electrons?
We can see submicroscopic particles by using a scanning tunneling electron microscope.
What is a homogenous mixture?
a mixture in which the composition is uniform throughout the mixture, an example of this would be sweet tea.
How many calories (c) are in one Calorie (C)
there are 1000 calories in every Calorie
What are the freezing and boiling points in Celsius
Freezing: 32°C
Boiling: 212°C
What composes matter?
Matter is composed of atoms, submicroscopic particles that are fundamental building blocks of matter.
Which two elements are a liquid in their natural state?
Bromine (Br) and Mercury (Hg) are liquids at room temperature.
What is a heterogeneous mixture?
a mixture in which the composition is not uniform throughout, an example of this would be fruit salad.
What is the law of conservation of energy?
The law of conservation of energy states that energy cannot be created nor destroyed
Define temperature.
Temperature is the measure of thermal energy of matter (not the exchange)