Which statement describes the transfer of heat energy that occurs when an ice cube is added to an insulated container with 100 milliliters of water at 25 degrees celsius?
1. both ice cubes and the water will lose heat energy
2. both the ice cubes and water gain heat and energy
3. the ice cube's gain heat energy and the water loses heat energy
4. the ice cube loses heat energy and the water gains heat energy

If the same amount of cacl2 is added to equal volumes of water and maple syrup, which will have the higher temperature?

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.