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Student A
Student A has a starting pulse rate of 70 beats per minute. To find her resting pulse rate, Student A will lie down and relax for 5 minutes. After 5 minutes, her pulse rate is 60 beats per minute. Next, Student A will jog for 1 minute. Increased movement causes her pulse rate to change again. After 1 minute of jogging, her pulse rate is 100 beats per minute. [100 bpm]
Student B
Student B's starting heart rate is 73 beats per minute. Next, he will rest for 5 minutes, expending very little energy. Notice the effect on the pulse rate. His resting pulse rate is 65 beats per minute. When Student B jogs for 1 minute his pulse rate changes again. It rises to 107 beats per minute. [107 bpm]Record your observations.
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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle.This is the picture taken by the Hubble Space Telescope showing thousands of galaxies.
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A Galaxy made with Dust, gas, and stars
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