Changes
This type of change does NOT change what the substance is.
What is a physical change?
These are the three particles that make up an atom.
What are protons, neutrons, and electrons?
This form of energy is stored in chemical bonds and is used in food and fuel/
What is chemical energy?
Salad is an example of this type of mixture.
What is a heterogeneous mixture?
On the periodic table, elements in the same group or column share these.
What are chemical properties?
Rotting food, burning wood, and rust are all an example of this type of change?
What is a chemical change?
This particle determines the atoms identity and is positively charged.
What is a proton?
As a roller coaster starts sliding down a hill, potential energy converts to this kind of energy.
What is kinetic energy?
Saltwater and salad have this in common.
They are both mixtures.
This state of matter has a defined volume but fills the shape of its container.
What is a liquid?
What are two signs a chemical change has occured?
Color change, gas production, temperature change, light production, solid forms
This negatively charged particle orbits the nucleus and is involved in chemical bonding.
What is an electron?
This law states that energy is never created or destroyed and only changes forms.
What is the law of conservation of energy?
Saltwater is not a compound because it can be seperated by this
What are physical means or physical changes.
This type of matter has atoms that vibrate but do not move around.
What is solid?
This law states that in a chemical reaction, the mass of the products is always equal to the mass of the reactants.
What is the Law of Conservation of Matter?
This atom has 1 proton and 1 electron.
What is Hydrogen?
When a student rubs there hands together to create heat, this type of energy converts to this type (include both in order)
What is mechanical kinetic energy to thermal energy?
When oxygen and hydrogen combine to form water, they are forming this type of matter.
This element smells like rotten eggs and causes minerals that it is present in to be yellow.
What is sulfur?
Mr. Stroud stirs salt into water, then boils the water to recover the salt. This type of change took place in this experiment.
What is a physical change?
These elements make sugar and are vital to the survival of humanity.
What are hydrogen, oxygen, and carbon.
In an endothermic reaction, what happens to heat energy?
What is heat is absorbed into the reaction.
Compounds are different than elements due to this
What is elements have 1 type of atom, while compounds have multiple.
This is the atomic symbol for Gallium, an element that has a melting point that is near human body temperature.
What is Ga?