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AREA, SIZE, AND MASS

AREA, SIZE, AND MASS. ENG 205 CE-ME-MECE-MSE. VOCABULARY. UNIT ABBREVIATIONS. GRAMS: g KILOGRAMS: kg SQUARE MILIMETRES: mm² CUBIC METRES: m³ KILOGRAMS PER CUBIC METRE: kg/ m³. CROSS-SECTIONAL AREA = πr² (adjective+noun):.

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AREA, SIZE, AND MASS

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  1. AREA, SIZE, AND MASS ENG 205 CE-ME-MECE-MSE

  2. VOCABULARY

  3. UNIT ABBREVIATIONS • GRAMS: g • KILOGRAMS: kg • SQUARE MILIMETRES: mm² • CUBIC METRES: m³ • KILOGRAMS PER CUBIC METRE: kg/m³

  4. CROSS-SECTIONAL AREA =πr²(adjective+noun): The area of what you see when you cut through the middle of something so that you can see its layers. • If a cable’s cross-sectional area increases, it can carry more elecricity safely.

  5. SURFACE AREA (noun+noun): The amount of surface that is in contact with the air • To find the surface area of a cylinder, you need to add the top, bottom and side areas together.

  6. SMALL-SECTION (adjective): Something that has a small cross-sectional area • A group of small section cables are used in power lines

  7. LARGE-SECTION (adjective): Something that has a large cross-sectional area • We are changing the pipes in our house. We are replacing then with large-section pipes.

  8. WEIGHT (noun): how heavy something is, which can be measured in kilograms • She is trying to lose weight.

  9. WEIGH (verb): To have a particular weight • You need to weigh your luggage before going to the airport.

  10. MASS (noun): The quantity of material that something contains which can be measured in kilograms or Newtons. Weight is used in non-technical language for this meaning. • The mass of an object is the same on Earth and Moon, but the weight of an object is different.

  11. GRAVITY (noun): The force that attracts objects in space towards each other and pulls them towards the centre of Earth • Gravity keeps the planets in orbit around the Sun.

  12. WEIGHTLESS (adjective): Having no weight because there is no gravity • Astronauts work in weightless conditions.

  13. VOLUME (noun): The amount of space that an object fills. It is measured in m³ . • There are jars of different volumes in the kitchen.

  14. DENSITY (noun): The amount of matter in a certain volume of space and it is measured by mass per unit of volume • Density can be changed by pressure or temperature.

  15. DENSE (adjective): Having high density • As you go up a mountain, the air becomes less dense.

  16. LIGHTWEIGHT (adjective): not heavy • I bought a new lightweight bike.

  17. Tic-Tac-Toe Directions: Divide the class into two teams (Xs and Os). Draw a grid on the board. Ask the X group to answer one of the questions. If they get it right, Put an X on the grid. Do the same for group O. The group with a row of Xs or Os win. Books are closed.

  18. Words: Weight, weigh, mass, density, dense, weightless, small-section, large-section, cross-sectional area, surface area, grams, square milimetres, cubic metres, kilograms per cubic metres, gravity

  19. EXERCISES & OVER TO YOU

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