By Don Herweck
Albert Einstein is definitely one of the so much influential scientist and maximum physicist of the 20 th century. He revolutionized our principles approximately time and house and is better recognized for his conception of relativity and his equation E=mc^2, and is the reason the connection among power and mass. by means of age 30, he was once thought of via many to be one of many world's maximum medical thinkers.
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Place a thermometer in each glass. 4. Allow the glasses to stand undisturbed for one minute. 5. Read and record the temperature shown on each thermometer. 6. Set glass #1 in the bowl. 7. Add cold water from the faucet so that < previous page page_36 next page > < previous page page_37 next page > Page 37 there are about 2 inches (5 cm) of water in the bowl. 8. As soon as the cold water is in the bowl containing glass #1, place glass #2 in the freezer and shut the door. 9. At the end of one minute, read and record the temperature shown on each thermometer.
Let's Explore 1. Would the size of the pebble swallowed by the bird affect the way its gizzard will grind the food? Repeat the experiment using stones larger than aquarium gravel. 2. Can a seed in its shell pass through a bird's digestive system without being broken? Repeat the experiment without breaking the shells open. Show Time! 1. How do animals without gizzards or teeth grind their food? Some, like baleen whales, do not grind their food at all. The food is swallowed, and enters the stomach < previous page page_34 next page > < previous page page_35 next page > Page 35 where it is slowly digested.
Previous page page_44 next page > < previous page page_45 next page > Page 45 6. Read and record the temperature of the water in each jar. 7. Remove the thermometers, and seal each jar with a lid. 8. Quickly cover the jar in the box with a layer of cotton balls. 9. Close the lid on the box. 10. Leave the jars undisturbed for ten minutes. 11. Uncover the jars, and stand a thermometer in each jar. 12. Allow the thermometers to stand for one minute. 13. Read and record the temperature the water in each jar.