Which of the following correctly describes a compound? (4 points) a The atoms are chemically bonded together, and they retain their individual physical and chemical properties. b The atoms are not chemically bonded, and there is no set ratio for how the atoms can combine together. c The atoms can only combine in fixed ratios, and they can only be separated by a chemical change. d The atoms do not retain their individual chemical properties, and they can be separated by physical means.

Hannah is writing a report on how albedo affects the global climate. she’s proofreading her passage for any factual errors. which sentence must hannah correct before submitting her report? earth receives energy from the sun. this energy drives many of the processes on earth, including its climate. some part of this energy is reflected by earth’s surface. we use the term albedo to describe the reflected energy. albedo of an object is the ratio of the reflected radiation to the total radiation reaching the object. a value of 0 means no energy is absorbed by the object, whereas a value of 1 means that all of the energy is absorbed. in this way, the albedo of an object can influence earth’s atmospheric temperature.

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude