1. Chapter 2 Section 1 Review Page 30 #’s 1-8 Directions: Write down the question and the answer for each question on a piece of paper to be included in your Chapter 2 Notebook.

2. 1. Define the size and shape of Earth. Earth is an oblate spheroid (a slightly flattened basketball shape) with a circumference of 40,007.-40,074 km. Earth is an oblate spheroid (a slightly flattened basketball shape) with a circumference of 40,007.-40,074 km.

3. 2. Describe two characteristics that make Earth unique in our solar system. 2. Describe two characteristics that make Earth unique in our solar system. Earth has a thick atmosphere with oxygen Earth has a thick atmosphere with oxygen Earth has water in liquid, gas, and solid form Earth has water in liquid, gas, and solid form Earth has life on it Earth has life on it

4. 3. Summarize how scientists learn about Earth’s interior. 3. Summarize how scientists learn about Earth’s interior. Scientists observe seismic waves that travel through Earth. Scientists observe seismic waves that travel through Earth.

5. 5. Identify the possible source of Earth’s magnetic field. Motion of the liquid outer core may produce electric currents which in turn generate Earth’s magnetic field. Motion of the liquid outer core may produce electric currents which in turn generate Earth’s magnetic field.

7. 6. Summarize Newton’s law of gravitation. 6. Summarize Newton’s law of gravitation. The force of gravitational attraction increases when the mass of the objects increases and when the distance between the two objects decreases. The force of gravitational attraction increases when the mass of the objects increases and when the distance between the two objects decreases.

9. 7. What does the difference between your weight at the equator and your weight at the poles suggest about the shape of Earth? 7. What does the difference between your weight at the equator and your weight at the poles suggest about the shape of Earth? A person having a greater weight at the poles indicates that the distance from the center of Earth to the surface is farther at equator than the poles. A person having a greater weight at the poles indicates that the distance from the center of Earth to the surface is farther at equator than the poles.

10. 8. How does the asthenosphere differ from the mesosphere? 8. How does the asthenosphere differ from the mesosphere? The asthenosphere is solid rock that is able to flow because of its plasticity. The mesosphere is solid rock that remains rigid (cannot flow). The asthenosphere is solid rock that is able to flow because of its plasticity. The mesosphere is solid rock that remains rigid (cannot flow).

11. 9. Why would you weigh less on a high mountain peak than you would at sea level? 9. Why would you weigh less on a high mountain peak than you would at sea level? You would weigh less on a high mountain peak because you would be farther from the center of Earth You would weigh less on a high mountain peak because you would be farther from the center of Earth

12. The End… Shark Bait….