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how are the seeds removed from seedless grapes

Seedless grapes are in fact cloned from genetically defected grapevines. ... read more

waves, sound, and light

Light and sound are two of the most important forms of energy to humans. People see light and hear sound. Light from the Sun makes life on Earth possible. Sound is one of the most important ways that animals and humans communicate. Both sound and light travel as waves. Light also behaves like a partic... read more

what is astronomy

Have you ever looked up in the sky and wondered what life would be like if you lived on Mars? Astronomy is the study of the universe, or outer space, and can help you find the answer to your question. ... read more

how does chlorine clean swimming pools

The chemical reaction that stops swimmers from getting sick. ... read more

plant movements and adaptations

Plant Movements ... read more