Question

Which of the following is an example of only a physical change?(1 point)

Answer 1

Which of the following is an example of only a physical change?(1 point)

the green color of the Statue of Liberty

dry ice becoming vapor

the smell of rotten eggs

the creation of table salt

Answer 2

Which of the following demonstrates a chemical change?(1 point)

dry ice vaporizing steam

condensing on a mirror

iron (Fe) reacting to water(open paren cap h sub 2 cap o close paren) and oxygen(O) to form iron oxide

sugar and water mixing to create sugar water

Answer 3

Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?(1 point)

Answer 4

Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?(1 point)

observe a color change

monitor for the release of a gas

test for the release of heat

conduct a test to determine the chemical makeup of the molecules

Answer 5

choose one.

Answer 6

Which of the following happens during a chemical change but does not happen during a physical change?(1 point)

Answer 7

a) Boiling water to form steam
b) Dissolving salt in water
c) Burning a piece of wood
d) Rusting iron

Answer 8

dry ice becoming vapor

Answer 9

iron (Fe) reacting to water (H2O) and oxygen (O) to form iron oxide

Answer 10

a) Seeing a color change or formation of a precipitate
b) Feeling a change in temperature
c) Observing the release of gas bubbles
d) All of the above

The correct answer is: d) All of the above

Answer 11

All of the above

Answer 12

If I have to choose one, I would say observe a color change.

Answer 13

a) Formation of new substances
b) Change in state or phase
c) Change in appearance
d) Change in temperature

The correct answer is: a) Formation of new substances