Final answer:
It is false to claim that Earth's surface absorbs all the sun rays. Approximately 70 percent of the incoming sunlight is absorbed by the Earth's surface and oceans, while the rest is reflected back into space.
Step-by-step explanation:
The statement 'the Earth's surface absorbs all the heat falling on it through sun rays' is generally false.
Not all of the sun's rays are absorbed by the Earth's surface. Some part of it is reflected back into the atmosphere. The sunlight that does reach the surface of the earth contains infrared light, which is converted into heat when it hits the ground. However, some sunlight is reflected back into space, and some is absorbed by the atmosphere itself. On average, about 70 percent of the incoming sunlight is absorbed by the Earth's surface and oceans, while the rest is reflected back into space.
Learn more about Sunlight absorption