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.

What has direct effect on precipitation and climate

State the number of degrees of longitude that separates New York City from Reno, Nevada, and the time difference, in hours, between these two cities

According to Newton's third law, the Voyager probes pulled just as hard on Jupiter as it did on them when they flew past it. Why were they accelerated enough to leave the solar system but Jupiter still is in orbit about the Sun?

What do all eagles eat? What is their favorite prey?

Does the Earth system essentially contains a fixed amount of chemical elements that cycle continuously throughout the system.

What kinds of biomes do we have in New Jersey

Which describes Italy's Mediterranean climate? a) mild and wet all year round b) hot in the summer and mild in the winter c) cool in the summer and warm in the winter d) moist in the summer and dry in the winter

What does tnc stands for

What is a really big carnivore that lives in the ocean that is not a shark or a whale?

What do demographers and urban planners do