Most radiation is released as particles. Identify the type radiation that is not a particle.1.alpha
2.beta
3.gamma
4.positron

How are solution useful for society

Question 3 A compound is the chemical bonding of _____. a two or more solutions b two or more mixtures c two or more elements
Question 4 Which item is a mixture? a copper b table salt c carbon d air Question 5
A sample of matter that contains only one kind of atom would be classified as _____. a a homogeneous mixture b an element c a heterogeneous mixture d a compound
Question 6
Which action will make a solid solute dissolve more slowly in a liquid solvent? a decreasing the solvent’s temperature b stirring the solution c crushing the solute into small pieces Question 7
A chemical change is required to separate the components of a _____. a heterogeneous mixture b compound c homogeneous mixture Question 8
Solutions and heterogeneous mixtures have _____. a parts that are chemically bonded to one another b parts that are physically mixed c individual parts that can be seen without a microscope
Question 9
Matter that is always composed of the same combination of atoms is a _____. a solution b substance c mixture Question 10
Adding more solute to a solution changes the _____. a polarity of the solute molecules b solubility of the solute c concentration of the solution
Question 11
Saturated is a term that is used to describe _____. a polarity b pH. c solubility d concentration Question 12
Evaporation, a physical change, could be used to separate the components of a(n) _____. a substance b mixture c element d compound
Question 13
Which phrase describes the parts of a solution but NOT the parts of a heterogeneous mixture? a evenly mixed b easily visible with the unaided eye c always a single type of atom d chemically bonded Question 14
Which item could be separated into its component parts only by using a chemical change? a granite b air c table salt d salt water

Two examples of an insulator

What type of wave is shown below?

Which describes Newton's law of universal gravitation?Gravitational force is directly proportional to the distance between objects.
All objects repel all other objects.
Gravitational force increases with distance.
All objects attract all other objects.

An ice cube melts when its mechanical energy increases.