Rocks A rock can be a solid, a liquid, and a gas. Most rocks that you see are solids, but when rock gets very hot it can turn into a liquid and a gas. This happens to rocks during a volcanic eruption. The rocks get very, very hot and it becomes a liquid. This liquid is called magma. During the eruption, the rock gets so hot that some of it turns into a gas and floats away. Once it cools down, the liquid magma turns back into solid rock. 4.7 (2.1 with liquid, solid, gas, volcanic, eruption, and magma pre-taught) Rocks A rock can be a solid. A rock can also be a liquid and a gas. Most rocks you see are solids. When a rock gets very hot, it can turn into a liquid and a gas. This happens to rocks during a volcanic eruption. The rocks get very, very hot and it becomes a liquid. This liquid is called magma. The rock gets so hot that some of it turns into a gas and floats away. The magma turns back into a solid rock when it cools down. 3.2 (1.1 with liquid, solid, gas, volcanic, eruption, and magma pre-taught) Rock Report (from multiple sources) A rock is a solid, but it can also be a liquid and a gas. The liquid form of a rock is called magma. Magma is made when rocks get very hot during a volcanic eruption. Some of the rock is so hot that it floats away as gas when the volcano erupts. Magma is called lava when it flows out of the volcano. Afterward, the rock cools down and turns back into rock. Paper Paper can be a solid and a liquid. Paper is made from solid wood chips. The wood chips are smashed into a liquid pulp. The liquid pulp is rolled out over a screen where extra liquid drains. The paper passes through heated rollers to remove all the extra liquid. Now the dried paper is rolled into large rolls and sent out to schools. 4.6 (3.2 with liquid, pulp pre-taught) Paper Paper can be a solid and a liquid. Paper is made from solid wood chips. The wood chips are smashed into a liquid pulp. The liquid pulp is rolled out over a screen. The extra liquid drains. The paper passes through heated rollers to remove all the extra liquid. Now the dried paper is rolled into large rolls. The paper is sent out to schools. 3.2 (2.1 with liquid, solid, and pulp pre-taught) Paper Report from multiple sources There are many steps in making paper. The first step to make paper is to dry the wood, and cut it into chips. Next, the chips are ground up into a pulp. Pulp is the liquid form of paper. Then the pulp is rolled over a screen to remove the extra liquid. Finally, the dried paper is rolled into a large roll. A long time ago the Chinese used thick paper for blankets clothes and shoes, but now we just use it to write on. Water Water can be a solid, a liquid, and a gas. When water is very cold, it freezes and becomes ice. Ice is solid water. When water is a liquid, it takes the shape of any container you put it in. The water in a drinking fountain is a liquid. When water is heated it starts to boil. Little bubbles form in the water and it is very hot. Steam comes off the water. The steam is water as a gas. 3.5 (2.6 with solid, liquid, gas, and container pre-taught) Water Water can be a solid, a liquid, and a gas. Water is a solid when it is very cold. Ice is the name for solid water. When water is a liquid, it takes the shape of its container. The water in a drinking fountain is a liquid. When water is heated up it starts to boil. When the water is very hot steam comes off of it. The steam is the gas form of water. 3.1 (1.9 with solid, liquid, gas, and container pre-taught) Water Report from multiple sources Water can be a solid, liquid, or gas. When water freezes, it becomes a solid. We call this form ice. When ice, melts, it turns back into water. When water is heated very hot, it starts to boil. When water boils, steam rises into the air. Steam is water in gas form. You can see steam rising into the air off of a boiling pot, or a hot cup of coffee. Concrete Concrete can be a solid and a liquid. It starts as a solid powder. You mix the concrete powder with water. This creates a concrete liquid. The concrete liquid is poured into a mold. The concrete liquid dries and all the water evaporates into the air. Once it is dry, it is solid concrete like the kind you see on a sidewalk. 4.2 (1.8 with concrete, liquid, solid pre-taught) Concrete Concrete can be used to make many things. People use concrete to make houses and tall buildings. Many old and new buildings are made from concrete. They also use concrete to make sidewalks. They use concrete to make roads for people to drive on. People use concrete to make bridges and dams. One very famous concrete dam in Arizona is called the Hoover Dam. 4.3 (3.1 with concrete pre-taught) Concrete Concrete is used to make many things. Houses are made of concrete. Tall buildings are also made of concrete. People use concrete to make sidewalks. They also use concrete to make roads. Concrete it used to make bridges and dams. One famous concrete dam in Arizona is called the Hoover Dam. 3.9 (1.3 with concrete, Arizona, Hoover pre-taught) Crayons Crayons can be a liquid and a solid.