Lesson 1
What is a mixture?
A mixture is two or more substance that are in the same place together in the same place, but their atoms are not chemically combined.
What is a physical and chemical change?
A physical change- its a change the alters the form or apperance of a substance without changing it into a different substance.
A chemical change - a change in matter that produes one or more new substances.
By measuring it
Chemicals and resources made by humans are called ?
Synthetic
What are heterogeneous and homogenous mixtures?
A heterogeneous mixture- that features distinct components that can easily be sorted.
A homogenous mixture- their different compnents are difficlt to see and are spread ou uniformly thoughout the entire mixture.
What are exothermic and endothermic reactions?
A exothermic reaction is when the energy is released as products form is greater then the energy required to break tthe bonds of the reactants.
A endothermic is when more energy is reqired to break the bonds of the reactants than is released by the formation.
How many atoms of hydrogen are in one molecule of ammonia?
Three atoms
What are Synthetic Fuels?
A liquid fuel, or sometimes gaseous fuel.
Is a colloid a heteregenous mixture or a homogenous mixture?
heteregenous mixture
Energy being released in the form of heat from a chemical reaction is known as a?
Exothermic reaction
what are the types of chemiacl reactions?
Synthesis, Decomposition, and Replacement
What is a synthetic material?
A synthetic material is when substances are deliberately joined together to produce a material with different characteristics.
What happens if you let a glass of cloudly liquid sit still for a while?
The liquid can seep into the glass though micro froctures.
How does reducing the temperature of a chemical reaction affect the rate at which it occurs?
The modules are slower and collide less.
what are open and closed systems?
A open system is in which the matter can ether from or escape to the surroundings
How do the structures of polymers help to make them useful materials?
Their structure can be altered and tailored to produce materials.
What is sodium chloride made of?
Sodium chloride is made of positively charged sodium ions and negatively charged sodium ions.
What temperature does pure water boil at?
100 C
How the masses on the scales demonstrate the law of conservation of mass?
The total mass and of the products must be equal to the total mass of the reactant.
What's the difference between the structure of monomers and polymers?
The formers in necessary component that forms the latter.