The lungs occupy a small volume but have a very large surface area
What will be an ideal response?
This is the case. The alveoli in the lungs are tiny sacs; the space is filled with so
many of these alveoli that they collectively give the inside of the lung a very large surface
area.
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Two twin sisters, Gwen and Jackie, are both 20 years old in the year 2020. Jackie takes off on a round-trip to Vega, 25 light-years away. She travels at an average speed very close to the speed of light—say, 0.9999c
According to Gwen back on Earth, about how long does it take Jackie to reach Vega? A) about a month B) about 10 years C) about 25 years D) about 100 years
Aristotle's "continuous" model of matter was proved wrong about 1807 by
a. Bohr. b. Thomson. c. Dalton. d. Rutherford.
Process of Science: Think about some ways in which we might figure out how old things are that last for much longer than a human lifetime. What about for things that last longer than humans have existed?
What will be an ideal response?
When a ball thrown straight upwards reaches the very top of its path, its acceleration is
A) zero. B) 5 m/s2. C) 10 m/s2. D) none of the above