Physical Properties/Change
What is a physical change?
A change in form or appearance of matter. (State change, paper ripped, etc)
What is rusting?
A chemical change. Produces one or more new substances.
What is mass?
The amount of matter an object has.
What are pure substances?
Made by one atom only , cannot be broken down. (Example - Oxygen o2)
What is volume?
the amount of space occupied by an object
What are examples of physical properties?
color, texture, material, sink/float, state, etc.
What is a chemical change?
Matter turns that produces one or more new substances. (rusting)
What is weight?
The amount of the force of gravity on an object.
What are mixtures?
Combinations of 2 or more substances. (Ex. lemonade, Chocolate milk)
What is density?
how much mass is packed into a given space or volume
What does it mean if something can float?
It has less density.
What is the law of conservation of mass?
Mass cannot be created or destroyed. It can transform. (Ex. paper burned to ash)
What happens if weight decreases?
The gravity is lower.
What is a homogenous mixture?
Even blend, cannot see different parts. (Ex. air, sea water)
Which of the following would float to the top:
Dish soap - density: 1.03 g/ml
Honey - density: 1.36 g/ml
Corn Syrup - density: 1.33 g/ml
Corn Oil - density: 0.91 g/ml
Water - density: 1.00 g/ml
Corn Oil
What is conductivity?
Ability to store/transfer heat or electricity.
What are ash, water vapor and carbon dioxide fumes?
Results of a chemical change.
Which does not change at all?
Mass.
What is a heterogeneous mixture?
Not an equal blend, can be separated easily. (Ex. water / oil, sand / rocks)
What is the density formula?
Density = mass / volume
What is the difference betwen a chemical and physical change?
Physical - change of state
Chemical - requires a reaction!
What is a chemical property?
A property that has to be caused by a reaction. (conductivity, flammability, boiling point)
What happens if you go to a planet with 50% less gravity?
Mass stays the same, weight decreases by 50%
What are oxygen and sugar?
Oxygen - pure substance
Sugar - pure substance
Which of the following would sink to the bottom:
Which of the following would float to the top:
Dish soap - density: 1.03 g/ml
Honey - density: 1.36 g/ml
Corn Syrup - density: 1.33 g/ml
Corn Oil - density: 0.91 g/ml
Water - density: 1.00 g/ml
Honey