Gravity, weight and mass

• Gravity is a force that attracts everything in the universe.

• The earth and the sun are attracted by more stronger force of gravity.

• The more massive objects have high gravity.

• Gravity between two objects becomes weaker as the objects move further apart.

• High and low tides in the ocean are because of the moon's gravity.

• gravitational field strength is measured in newtons per kilogram (N/kg).

• Weight is measured in newtons.

• Weight can change according to the location.

• Mass is measured in kilogram.

• Mass can't be zero.

• The mass of an object always stays same, even when an object's location changes.

• Mass is not affected by gravity.