Which cup is the best insulator

Thermal conductivity is commonly described in terms of how fast a unit of heat, called a BTU, or British Thermal Unit, can travel through 1 foot of material in one hour due to 1 degree F of difference. Glass is far inferior to paper, plastic and Styrofoam in terms of insulation.

The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0. Paper, glass, plastic and Styrofoam are common materials used in containers holding hot beverages. Considering containers of the same size, a glass container is the least effective for keeping a cup of coffee warm.

Though not commonly used in the United States, using elegant glass cups for serving coffee or other hot drinks is common in Austria, Spain and India. The insulative values of paper and Styrofoam aren't that different, but Styrofoam cups generally are much thicker than paper ones, so they keep your coffee hot longer.

Student teams investigate the properties of insulators in their attempts to keep cups of water from freezing, and once frozen, to keep them from melting. Grade 4 Do you agree with this alignment? Energy can be moved from place to place by moving objects or through sound, light, or electric currents. Energy is present whenever there are moving objects, sound, light, or heat. When objects collide, energy can be transferred from one object to another, thereby changing their motion.

In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced. Light also transfers energy from place to place. Energy can also be transferred from place to place by electric currents, which can then be used locally to produce motion, sound, heat, or light. The currents may have been produced to begin with by transforming the energy of motion into electrical energy.

Energy can be transferred in various ways and between objects. Grade 5 Do you agree with this alignment? Measurements of a variety of properties can be used to identify materials. Boundary: At this grade level, mass and weight are not distinguished, and no attempt is made to define the unseen particles or explain the atomic-scale mechanism of evaporation and condensation. Standard units are used to measure and describe physical quantities such as weight, time, temperature, and volume.

Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e. Grade 3 More Details View aligned curriculum Do you agree with this alignment? Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories.

Solve one- and two-step "how many more" and "how many less" problems using information presented in scaled bar graphs. Materials have many different properties. Grades 3 - 5 More Details View aligned curriculum Do you agree with this alignment?

Requirements for a design include such factors as the desired elements and features of a product or system or the limits that are placed on the design.

Identify and collect information about everyday problems that can be solved by technology, and generate ideas and requirements for solving a problem.

Compare, contrast, and classify collected information in order to identify patterns. Massachusetts - Math Tell and write time to the nearest minute and measure time intervals in minutes. Identify materials used to accomplish a design task based on a specific property, e. Give examples of how energy can be transferred from one form to another. Aerogel is more expensive, but definitely the best type of insulation. Fiberglass is cheap, but requires careful handling.

Mineral wool is effective, but not fire resistant. Cellulose is fire resistant, eco-friendly, and effective, but hard to apply. Spray foam insulation is the most energy-efficient insulation to create an air barrier in the attic. Certain spray foams can expand up to times its original size, so it fills all of the nooks and crannies in the attic. Metals are good conductors poor insulators. Electrons in the outer layers of metal atoms are free to move from atom to atom.

These are materials that will not allow the flow of charged particles nearly always electrons through them. Why is paper a bad conductor of heat? Materials such as wood, glass, paper, rubber and air are classified as poor conductors because they offer very large resistance to the flow of heat current.

Each time styrofoam kept the liquid warmest. I tried to upload my results but it wouldnt let me. I hope you found the summary of my procedure helpful. Jump to. Board index. All rights reserved. Reproduction of material from this website without written permission is strictly prohibited. Use of this site constitutes acceptance of our Terms and Conditions of Fair Use.