Phase Changes

Master phase changes: states of matter, kinetic energy, and graphs. Science worksheet for grades 9-12.

Click on each blank to correctly fill in the sentences below. Energy is the ability to do work or cause change. Kinetic energy is determined by the movement of molecules. If molecules move more, there will be more kinetic energy. This will cause more thermal energy which will cause a higher temperature. When temperatures are adjusted, phase changes can occur. What are the three states of matter? kinetic, thermal, heat temperature, size, molecules solid, liquid, gas freezing, evaporation, condensation Molecules in Phases For each phase below, draw what the molecules would look like in each circle for that state matter. State of Matter Matching Match each term with it's correct card on the right. solid atoms very close together liquid atoms "mediumly" spread out gas atoms are very spread out solid energy low energy- atoms minimally move liquid energy medium energy- atoms more around some to spread out gas energy high energy- atoms move around a lot Phase Change Graph Click on each blue dot and type in the correct label that belongs in that section of the phase change graph. You may refer back to your notes from yesterday if needed. Use the word bank below to fill in the missing parts (spelling will count and use all lower case letters!) condensation melting freezing evaporation freezing melting condensation evaporation Sorting Activity! Sort each card below into the correct category. Melting Solid to a liquid Freezing Liquid to a solid Condensation Gas to a liquid Evaporation Liquid to a gas During a phase change, the temperature will remain constant (flat change) but the amount of kinetic energy will change. True False Molecule Matching! Match each image with its correct state of matter. solid liquid gas If a substance was changing from a solid to a gas, which statement below is true? The kinetic energy would be increasing The temperature would be decreasing The kinetic energy would be decreasing All of these are false statements Which of the pictures below would have more kinetic energy than the other? The apple The orange juice Explain why you chose the answer above.