Explanation:
Which process is a physical change?
c. melting ice
If you break a piece of glass, the shape of the glass changes, but the properties in the fragments remain the same. Which of the following has occurred?
d. a physical change
A substance made up of two or more elements that have been chemically combined is called
c. a compound
Of the three ordinary states of matter, gas is the only state that
c. is highly compressible
In which state of matter do the particles have the most energy?
b. gas
Elements in group 18 called Noble Gases are highly reactive because they have 1 valence electron.
false
Atomic mass is the sum of
b. protons and neutrons
The current model of the atom is known as
a. Rutherford's model
Most elements on the periodic table are
d. metals
Which is not a quality of a non-metal?
a. shiny
Hope this helps.
Answer:
Color is the least reliable property for mineral identification. The same mineral can come in a variety of colors and different minerals can be the same color. The color can change over time do to weathering.
Explanation:
Pressure and heat is the two forces
Answer:
A choosing to burn coal to generate electricity
Explanation:
Neither nuclear energy nor alternative sources such as wind and solar seem likely to meet the demand for electricity. ... Of all fossil fuels, coal puts out the most carbon dioxide per unit of energy, so burning it poses a further threat to global climate, already warming alarmingly.
