Yes, as we move higher above the Earth's surface, the mass remains the same, but the weight decreases. Weight is the force exerted on an object due to gravity, and it depends on the mass of the object and the strength of the gravitational field.
The decrease in weight as we go higher is due to the inverse square law of gravity. According to this law, the force of gravity decreases with the square of the distance from the center of the Earth. As we move away from the Earth's surface, the distance from the center of the Earth increases, and consequently, the force of gravity decreases.
However, it's important to note that mass remains constant regardless of altitude. Mass is a fundamental property of an object and is a measure of the amount of matter it contains. It does not change with location or gravitational field strength.