Questions

Gitanjali Rao, an 11-year-old Indian-American schoolgirl, was named as "America’s top young scientist" for inventing a cost-effective, quick lead-contamination detector in water. The seventh-grade student was inspired by the large-scale lead contamination in water in Flint, Michigan, that came to light recently.

Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.

Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.

Anything that has Mass and takes up Space is called Matter.

Matter has some mass and occupies some space. Mass means the amount of matter in an object. Space occupied by an object is called its Volume.

The Study of Matter and and how matter changes is called Chemistry.

1. Increased speed and memory capacity of microprocessors together with the support for virtual memory and

2. Growth of client server computing