Describing Matter
Heat and Light are examples of Matter. True or False.
False
What is the term for the force of attraction that holds two atoms together?
chemical bond
Weight is primarily a measure of:
pull of gravity on object
A physical change alters the form or appearance of matter. Which of the following best defines the result of a physical change?
only appearance is altered, no change or new substance
in body cells, food, fuel
Matter is anything that
has mass and takes up space
What is the basic particle from which all elements are made?
atom
If you travel from Earth to the Neptune, which property of your body remains the same?
mass
What is an example of a physical change?
boiling, melting, freezing, breaking, crushing, folding
The fact that matter is not created or destroyed in any chemical or physical change is known as the:
law of conservation of mass or matter
What kind of property of matter describes a substance's ability to change into different substances
chemical property
Elements are composed of a single type of ______
atom
Describe how to find the volume of an irregular object
graduated cylinder/ water displacement
Identify a chemical change, besides combustion
electrolysis, burning, oxidation, tarnish
Temperature is a measure of how hot or cold something is, and it is directly related to the average energy of motion of the particles of matter.
True
An example of a physical property of matter is
color, hardness, flexibility, temperature, boiling point, freezing point, etc.
In a chemical formula, what does the subscript number ('2' in CO2) represent?
2 oxygen atoms
The formula for density is _______________?
mass / volume
Melting an ice cube is what type of change
physical
Combustion is an example of an endothermic change
false
An example of a chemical property is
ability to burn, ability to rust, etc.
What is the difference between a compound and a mixture?
compound is chemically combined, or other
Calculate the density of a rock that has a mass of 400g and a volume of 10 cubic cm.
40g/cm3
How do we know a chemical change has occured?
What type of change is melting ice? (endothermic or exothermic)
endothermic