💡 Everyday Science

Explanation: The scientific study of caves is called speleology.

Explanation: The scientific study of algae is called phycology.

Explanation: The difference between day and night length increases as one moves from the equator toward the poles.

Explanation: BMI = Weight (kg) ÷ Height² (m²). It is used to assess whether a person has a healthy body weight. Normal BMI is 18.5-24.9; overweight is 25-29.9; obese is 30+.

Explanation: Red meat and spinach are among the richest dietary sources of iron. Iron is essential for producing hemoglobin in red blood cells that carries oxygen throughout the body.

Explanation: Carbohydrates are the body's preferred and most efficient source of energy. They are broken down into glucose, which cells use for fuel. Brain cells rely almost exclusively on glucose.

Explanation: Proteins are the building blocks of muscle tissue. They consist of amino acids and are essential for growth, repair and maintenance of body tissues.

Explanation: Scurvy is caused by a deficiency of Vitamin C (ascorbic acid). It causes weakness, anemia, gum disease and skin hemorrhages. Citrus fruits are rich sources of Vitamin C.

Explanation: IoT (Internet of Things) refers to the network of physical devices, vehicles, appliances and other objects embedded with sensors and software that collect and exchange data over the internet.

Explanation: Cloud computing delivers computing services — including servers, storage, databases, networking, software — over the internet ("the cloud") to offer faster innovation, flexible resources and economies of scale.