Hot asphalt poured onto flat ground cools to form a solid road surface. chemical or physical change

This is a physical change.

Hot asphalt is mixed with the sand crushed stones and spread onto the roads, when it gets dry it becomes hard giving a smooth straight surface of the road.

Asphalt is used to stick together stones and sand in the road.

It is a physical change because the phase of the asphalt changed from the liquid to solid.

At high temperature, asphalt is in liquid form and at room temperature, it is present in hard solid form.

it is important to conserve water because there is very limited amount of freshwater here on earth and if we are not smart about how we use it we will only be runnning out of our supply faster than neccessarry.

the answer is a. co2, this would be colder than the : )

explanation: