Length: 23:26 | ES MS | Views: 7657
Everything around us is made of stuff called matter, and all matter is made of atoms. Matter is anything that comes in three varieties, what scientists call phases. There are solids like rocks, cookies, and desks. There are liquids like water, honey, ... and juice. And there are gases, we breathe air and the helium in balloons. The main difference between the three phases is how fast the matters atoms move. All atoms move around because they have energy. The more energy that's in something, the faster the atoms move. Atoms in an ice cube don't move very much they're frozen in place. The atoms in liquid water slip and slide around that's why you can pour it and spill it. Water vapor atoms are moving pretty fast that's why they float around in air (a mixture of other gasses). Changing an objects phase of matter is just a matter of adding energy to atoms or taking it away.
Length: 10:20 | ES | Views: 117
Upon viewing the video and completing the enclosed student activities, students will be able to do the following: Define volume as the amount of space something takes up. Know that everything we see and touch has volume. Even things we cant see such ... as air have volume. Explain that it is possible to measure volume. Understand how to measure the volume of a regularly shaped solid (such as a box) by measuring and multiplying the width, length and height. Explain that a cubic centimeter has a length of one centimeter, a height of one centimeter, and a width of one centimeter. Differentiate between a solid and a liquid. Understand that measuring the volume of solids and liquids involve different approaches. List some ways we measure liquid volume in our everyday lives. Identify a beaker and a graduated cylinder. Accurately measure a given amount of liquid using a beaker and a graduated cylinder.