A Null Value in a Column May Indicate That There

question 68

True/False

A null value in a column may indicate that there is an appropriate value for that attribute,but it is unknown.

---

Definitions:

Melanoma-Causing Effects

The potential consequences of exposure to certain substances or radiation that can increase the risk of developing melanoma, a serious form of skin cancer.

Sunlight

The natural light emitted by the sun, which is essential for photosynthesis in plants, influences climate and weather, and provides energy and warmth to the Earth's surface.

Ozone

A molecule consisting of three oxygen atoms, important in the stratosphere for protecting the Earth from harmful ultraviolet radiation.

Antarctica

The Earth's southernmost continent, covered by an ice sheet and surrounded by the Southern Ocean.