How far is the moon from the earth

The Moon is only 363,104 km away from earth, and the Circumference is 10,917 km

WHY DO TREES USE CARBON DIOXIDE

Trees carry out process of respiration in which CO2 is utilized. That is, they absorb Carbon Dioxide the process called Photosynthesis. 

Photosynthesis is the conversion of light energy into chemical energy by living organisms. The material are Carbon Dioxide (CO2) and water, the energy source is sunlight, and the end-products include glucose and oxygen. 

why do trees grow upwards

Trees grow up because they are trying to get closer to the sun, in order to fuel  the process of photosynthesis. 

why do trees lose their leaves

Trees lose their leaves seasonally a especially during Autumn, and to the shedding of other plant structures such as petals after flowering or fruit when ripe. 

material used to make cement

Gypsum is also used to make the cement set more slowly, The main ones are Limestone and Shale.