Which of the following is a sign a chemical reaction has occurred? a liquid changes to a solid when cooled. a liquid forms bubbles when heated. two clear liquids combine and mix together. two clear liquids combine and turn cloudy.

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species

An object of mass 10.0 kg and volume 1000 ml and density 10 g/ml sinks in water who’s density is 1.0 g/ml. what is the mass of the water which has been displaced in kilograms