States of Matter
What are the three common states of matter?
Solid, liquid, and gas
What type of matter contains two or more substances combined together?
Mixture
What does the periodic table organize?
Elements
What is the amount of matter in an object called?
Mass
What formula do we use to calculate density?
Density = Mass ÷ Volume
Which state of matter has particles packed tightly together?
Solid
What type of matter contains only one type of particle throughout?
Pure substance
What does an element’s atomic number tell you?
Number of Protons
What is the amount of space an object takes up called?
Volume
An object has a mass of 20 g and a volume of 10 mL. What is its density?
2 g/mL
Which state has a definite volume but takes the shape of its container?
Liquid
A mixture in which different substances can be seen and are not evenly distributed is called what?
Heterogeneous mixture
What are the three main categories of elements we learned?
Metals, Non-metals, Metalloids
What tool is used to measure the volume of a liquid?
Graduated Cylinder
If an object is less dense than the liquid it is placed in, will it usually float or sink?
Float
Which state has particles that move freely and has the greatest kinetic energy of the three states?
Gas
A mixture that looks like it is made of only one substance because it is evenly mixed is called what?
Homogeneous mixture
Which type of element is usually shiny, conducts electricity well, and can be shaped?
Metal
Water starts at 20 mL and rises to 35 mL when a rock is added. What is the rock’s volume?
An object has a mass of 36 g and a volume of 12 mL. What is its density?
3 g/mL
Put solid, liquid, and gas in order from least to greatest kinetic energy.
Solid → Liquid → Gas
Salt completely dissolves in water and is evenly distributed. How should the salt water be classified?
Homogeneous mixture
Which type of element has properties of both metals and nonmetals?
Metalloid
Water starts at 42 mL and rises to 60 mL when an object is added. What is the object’s volume?
18 mL
Two objects have the same volume. Object A has a mass of 25 g and Object B has a mass of 50 g. Which object is more dense?
Object B