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:
When the meteor hit a caused a chain reaction which caused all that and made some cloud that was toxic.
Explanation:
Stars and planets, i guess.
Most bacteria are heterotrophic decomposers, which means they depend on other organisms for food and feed on dead matter.
A mutation could do that.
