Your Mom!
Just kidding.
The world's tallest buildinghttp://wiki.answers.com/wiki/Burj_Khalifa, is .82 kilometers tall. By comparison, Mount Everest is the word's tallest mountain and stands at 8.8 kilometers above sea level.
Objects closer to 1 kilometer are the height of Niagra Falls (1039 meters, or 1.039 kilometers).
anything that is about 4inches or 10cm
paper clip, a coin,an almond, a peach pit, an olive
Some examples of round objects include basketballs, oranges, dinner plates, and coins.
milimeters, centemeters, decameter, meter, kilometer
phone
Some examples of reflective objects include mirrors, glass windows, polished metal surfaces, and water surfaces on a calm day.
Planets, moons, asteroids, and comets are some examples of large objects that move around a star, such as the Sun in our solar system. These objects orbit the star due to gravitational forces and can vary in size and composition.
Some examples of objects that emit infrared waves include humans, animals, hot objects like stoves or heaters, and electronic devices such as remote controls.
Objects that are inside your house and on you.
Some examples of irregular shaped objects include rocks, branches, cloud formations, and coastlines. These objects do not have a consistent or symmetrical shape like a sphere or cube.
Guitar.
Some examples of objects that emit or reflect infrared light include the sun, humans, animals, and electronic devices such as remote controls and infrared cameras.