Question

name: date: student exploration: phase changes vocabulary: altitude, boil, boiling point, freeze, freezing point, gas, liquid, melt, melting point, phase, solid prior knowledge question (do this before using the gizmo.) maria wants a hard - boiled egg for breakfast. the recipe says boil water, then lower the heat so the water is simmering. but maria is in a rush, so she keeps the heat on high as the egg cooks. do you think the egg will be done faster if the heat is kept on high as the water boils? explain your answer. gizmo warm - up in the phase changes gizmo, select micro view. notice the nitrogen (), oxygen (), and water () molecules. to start, create ice. set add/remove heat energy to - 200 j/s, click play (), and then click pause () when the container is about half ice, half water. set add/remove heat energy back to 0 j/s, and then click play. 1. observe water molecules in the solid (ice), liquid (water), and gas (air) phases. a. in which phase(s) do molecules move freely? b. in which phase(s) are molecules held together? c. what do you notice about the positions of the ice molecules? when frozen, water molecules form a hexagon (six - sided shape) pattern. 2 click reset (), and select macro view. set the ice volume to 25 cm³. a. in which phase(s) is water held in a defined shape? b. in which phase(s) does the water take the shape of the container?

Explanation:

Answer:

(Prior Knowledge Question) No, the egg will not be done faster. Once water reaches its boiling - point (100°C at standard atmospheric pressure), its temperature remains constant during boiling. Keeping the heat on high just makes the water boil more vigorously, but does not increase the temperature of the water, so the cooking time of the egg is not affected.
(1. A) Gas
(1. B) Solid and liquid
(1. C) Ice molecules are arranged in a regular, fixed pattern (in a hexagon - shaped lattice when frozen).
(2. A) Solid
(2. B) Liquid