Explanation

Soil erosion is primarily caused by the natural forces of water and wind, as well as human activities that disrupt the soil.

These factors can accelerate the process of topsoil removal, leading to land degradation and decreased fertility. 

Explanation

The mass per unit volume of a substance is called density (density = mass/volume).

• The formula of Density is: D=m/v
• ****
• Here D is density,
• M is mass &
• V is Volume.
• Density is commonly expressed in units of grams per cubic centimeter.
• The standard units are kg/m³

Explanation

Fathometer: سمندر کی گہرائی کو جاننے والا آلہ

A fathometer is an instrument used to measure the depth of the ocean or any body of water, specifically the distance from the surface to the seabed.

It uses sound waves to calculate the depth by measuring the time it takes for the waves to return.

Galvanometer – Used to measure electric current.

Explanation

Water vapor is directly related to humidity, which plays a crucial role in weather prediction. 

The amount of water vapor in the air significantly influences cloud formation, precipitation, and temperature. 

Therefore, measuring water vapor content is essential for weather forecasting. 

Explanation

The final step of the scientific method is developing a conclusion.

It involves summarizing the findings, interpreting the data, and determining whether the hypothesis was supported or rejected.

The scientific method steps in order:

• Observation
• Hypothesis
• Prediction
• Research
• Experimentation
• Data Analysis
• Conclusion