Question

instructions: using the diagram below as a reference, fill in the missing information about the phase changes over time for water. the words you will use are listed to the right in the text box, write the proper term on the lines in the 2 paragraphs below.
the above diagram shows what happens as heat is applied to a substance. beginning at point a on the timeline, the material is a solid and has a definite volume and a definite . over time, moving to the right along the , there is an increase in . the increase in temperature causes the molecules of a substance to move around more . at point b the solid begins to melt and changes into a . during the liquid phase (point c), the substance is , and doing so faster the more is added. by point e, the substance is completely evaporated and in the . these molecules are moving fast and will continue to move faster as more is added.
moving left along the timeline represents what happens as heat energy is lost. as gas molecules and slow down, they will turn back to a liquid, a process called . water stays in the liquid phase until reaching a temperature of 0°c (32°f), at which point it will and become a solid. at this point, the molecules are together, and are no longer moving around one another, only in place.

Explanation:

1. Solids have definite shape and volume. Heat energy makes molecules move more rapidly. Solids melt into liquids. Liquids can move more freely with more heat energy added. Evaporated substances are in gas phase and move faster with more heat energy. Cooling gas molecules leads to condensation back to liquid. Liquids freeze into solids at certain temperature and solid - state molecules are tightly packed and vibrate in place.
2. Fill in the blanks based on the knowledge of phase - change concepts of water.

Answer:

The above diagram shows what happens as heat is applied to a substance. Beginning at point A on the timeline, the material is a solid and has a definite volume and a definite shape. Over time, moving to the right along the X - axis, there is an increase in heat energy. The increase in temperature causes the molecules of a substance to move around more rapidly. At point B the solid begins to melt and changes into a liquid. During the liquid phase (point C), the substance is cooling, and doing so faster the more heat energy is added. By point E, the substance is completely evaporated and in the gas phase. These molecules are moving fast and will continue to move faster as more heat energy is added.

Moving left along the timeline represents what happens as heat energy is lost. As gas molecules cool and slow down, they will turn back to a liquid, a process called condensation. Water stays in the liquid phase until reaching a temperature of 0°C (32°F), at which point it will freeze and become a solid. At this point, the molecules are tightly packed together, and are no longer moving around one another, only vibrating in place.