Matter Flashcards
how are molecules held together
a molecule is made of two or more atoms held together by chemical bonds
what is the difference between an element and a compound
Element cannot be broken down and a compound can and a compound is made of element
What are four methods of separating mixtures
magnetic attraction, evaporation, filtration, including distillation
What is a heterogenous mixture and a homogenous mixture
homogenous— cannot see different parts of a mixture////// heterogenous—- can see different parts of a mixture
What is an atom
is the basic particle from which all elements are made
How can volume be determined in a regular shaped object? Irregular
object? How are the units different?
Volume in a regular shaped object- lxwxh …… Volume in an irregular object- fill a graduated cylinder with liquid and put the object inside and calculate the difference……. Cubic centimeters is the difference between mL and centimeters
Which number is the metric system based on?
10
How do you determine if an object will float in another object?
First you calculate both of the objects density, then the object with the least amount of density will float.
What is the SI unit of mass?
kilogram
What are the two units for volume?
Cubic meter and cubic centimeter
How do you find the density of an object? Be able to use the formula
for density.
You divide the objects mass by volume
What is energy?
energy- the ability to do work or cause change
What are the three most familiar states of matter?
solid, liquid, gass
What is tarnishing?
slow combination of a bright metal with sulfur or another substance, producing a dark coating on the metal
Melting, freezing, boiling, and evaporating are all what type of
changes?
physical changes
Every form of matter has two kinds of properties, they are?
Physical properties and chemical properties
Scientists know that all matter in the universe is made of more than _____ different substances called ________
100,, elements
A mixture can be _______ or ________
Homogenous,,,,,,heterogenous
The si unit of mass is the________
Kilogram
The si unit of volume is the _______ _______
Cubic meter
Every chemical and physical change in matter includes a change in _______
Energy
A chemical reaction is another name for a ________
Chemical change
What are examples of physical and chemical properties?
physical——texture, form, color, appearance, ability to conduct heat, flexibility/////////// chemical——-tarnish, rust, flammability
