2nd Grade - Changing the States of Matter
Posted by Nasrin on Saturday, October 22, 2011
Under: 2nd Grade Chemistry
Over the past week we have studied about the three states of matter: solid, liquid, and gas. We drew sketch notes to learn about the H20 molecule, and to assist us in remembering how the molecules change, and how their speed also changes depending on the state they are in.
First we defined how many protons and neutrons are in an hydrogen atom.
Secondly, we defined how many protons and neutrons are in an oxygen atom.
Then we drew the H2O molecule, and discussed what happens when we increase or decrease energy. For example, when we decrease energy, liquid can turn into ice. If we increase energy, or add heat, liquid can change into gas.
We experimented adding and subtracting heat to the liquid form of H20. We noted observations and discussed this together. I gave my son an opportunity to answer questions such as what happens if we add energy to liquid? What happens if we take it away?
In our first experiment, we put liquid in a bowl, along with two various sized brown rocks. We then put the bowl into the freezer and waited for several hours before removing the bowl to observe how the liquid had changed. My son then used his hands and eyes to take experiment with the rocks, while explaining to me what happened. In this way, he understood that when we remove energy, the molecules slow down and form a solid structure. Liquid becomes ice. I
It is important for children to understand that now all liquid is water. Milk can be liquid, as well as vegetable oil, and other substances that can be found in ones kitchen.
In our initial experiment, we also removed the solid structure from the bowl, and turned this upside down to take a closer look at the changes in the structure. We noticed how the exterior walls of the water had turned into ice, while the interior had remained in a liquid state. Thus, we learned that the denser the water the longer it takes for water to become ice.
For our second experiment, we observed the water in a small pot. Within the pot, we had initially filled it with a large mass of water. We observed that it took longer for the water to begin the process of breaking down the molecules and increasing the energy for the liquid to change into a gas. I held my son up, but far enough away from the stove, so he could properly observe the speed of the molecules as they bubbled up and quickly evaporated into the air.
First we defined how many protons and neutrons are in an hydrogen atom.
Secondly, we defined how many protons and neutrons are in an oxygen atom.
Then we drew the H2O molecule, and discussed what happens when we increase or decrease energy. For example, when we decrease energy, liquid can turn into ice. If we increase energy, or add heat, liquid can change into gas.
We experimented adding and subtracting heat to the liquid form of H20. We noted observations and discussed this together. I gave my son an opportunity to answer questions such as what happens if we add energy to liquid? What happens if we take it away?
In our first experiment, we put liquid in a bowl, along with two various sized brown rocks. We then put the bowl into the freezer and waited for several hours before removing the bowl to observe how the liquid had changed. My son then used his hands and eyes to take experiment with the rocks, while explaining to me what happened. In this way, he understood that when we remove energy, the molecules slow down and form a solid structure. Liquid becomes ice. I
It is important for children to understand that now all liquid is water. Milk can be liquid, as well as vegetable oil, and other substances that can be found in ones kitchen.
In our initial experiment, we also removed the solid structure from the bowl, and turned this upside down to take a closer look at the changes in the structure. We noticed how the exterior walls of the water had turned into ice, while the interior had remained in a liquid state. Thus, we learned that the denser the water the longer it takes for water to become ice.
For our second experiment, we observed the water in a small pot. Within the pot, we had initially filled it with a large mass of water. We observed that it took longer for the water to begin the process of breaking down the molecules and increasing the energy for the liquid to change into a gas. I held my son up, but far enough away from the stove, so he could properly observe the speed of the molecules as they bubbled up and quickly evaporated into the air.
In : 2nd Grade Chemistry