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Detergents clean clothes by first removing particles of dirt from the fabric, then suspending the particles until they can be washed away.
particles of dirt
Wooly mammoths were hunted by big cats called sabertooth tigers, which also became extinct by the end of the last Ice Age. They were also hunted by early men armed with spears and clubs.
X-rays allow art historians to examine paintings internally without damaging them.
There is a New England influence in southern Ohio, manifesting itself in white churches and village greens.
a New England influence
Florists often refrigerate cut flowers to protect their fresh appearance.
A flat kite needs a tail to supply drag and to keep the kite pointed toward the sky. A simple one consists of cloth strips tied end to end.
A number of sculptors have rejected the abstractions of minimalist artists. These sculptors have developed a style of extreme realism involving ordinary subjects.
Water is an exception to many of nature's rules because of its unusual properties.
Compound bows are popular with bow hunters, but they are not permitted in international archery competitions.
Ropes are cords at least .15 inches in diameter and are made of three or more strands which are themselves formed of twisted yarns.
Grocers slice sides, quarters, and what are called primal cuts of beef into smaller pieces. These pieces are called retail cuts.
sides, quarters, and primal cuts
Leaves are found on all deciduous trees, but they differ greatly in size and shape.
In the past, biologists considered mushrooms and other fungi as a type of non-green plant. Today, however, they are most commonly regarded as a separate kingdom of living things.
mushrooms and other fungi
After electron microscopes were invented, scientists found many new viruses. Some of them were round, some oval, and some corkscrew-shaped.
The Wisconsin Dells is a region where the Wisconsin River cuts through soft sandstone. The strange formations that have been carved out of the rocks there are a delight to tourists. They have names such as Devil's Elbow, Grand Piano, and Fat Man's Misery.