Which of the following is a definite indicator of a chemical change?

A.

A substance is converted from a liquid to a gas.

B.

The change in a substance is reversible.

C.

The shape of a substance is changed.

D.

A new substance is formed.

Read or check out the video on metamorphic rocks ... How does contact metamorphism of pre-existing sedimentary or igneous rocks occur? Select one: a) By hot water circulating through oceanic crust. b) By high pressure conditions in a subduction zone.

According to Von Thuen's model, what kind of agricultural activity would lie closest to the city?

What is the carbon 'turnover time' or 'residence time' for:The atmosphereThe deep oceansShow your work and explain what each one means in more laymen's terms. Don't forget units.

The theory that explains why and how continents move is called

Was there nothing on earth could sweep this devil's spawn back into the hell from which it came this sentence is an example of which literary element? a. simile b. metaphor c. hyperbole d. personificatio

Do crabs think fish fly

What can an earth scientist study to find out what happened in earth's past/history? Question 2 options: Rock texture Rock layers Magma Rock composition

Qual a densidade demográfica média da europa? Ela e alta ou baixa?

Which country has the largest freshwater lake in central america?

What else besides volcanoes does the earths heat provide