Download Space Science Unit 2 Lesson 2 Worksheet 1. Which of Kepler`s laws

Space Science Unit 2 Lesson 2 Worksheet
1. Which of Kepler’s laws does the diagram below illustrate? Second Law (near perihelion, a planet sweeps out
an area that is short & wide, near aphelion, long & narrow).
2. At what point in Earth’s orbit is Earth farthest from the sun? aphelion
3. “The orbit of a planet or other body around the sun is an ellipse, and the sun is one focus of the ellipse.” This
is explaining which of Kepler’s laws? First Law
4. What type of force makes a body follow a curved path? Centripetal
5. What force caused a solar nebula to collapse toward the center, making the center of a star dense and hot?
gravity
6. Which diagram below, A or B, will have the greater gravitational force? Why? B, The objects are closer
together.
A.
B.
7. What is the process in which energy is released as the nuclei of small atoms combine to form a larger
nucleus? Nuclear fusion
8. What is an effect of centripedal force? Objects move in a circular motion.
9. At what point in Earth’s orbit is Earth closest to the sun? Perhelion
10.
What is a rotating cloud of gas and dust that forms into stars and planets? Solar nebula
11. What type of disk do planets form in? Protoplanetary disk
12. What are planetesimals? Large bodies that collided to form planets.
13. Which diagram below, A or B, will have the greater gravitational force? Why? A, Higher masses
A.
B.
14. Which of Kepler’s laws does the diagram below illustrate? Third, The square of the orbital period is proportional
to the cube of the planet’s average distance from the sun.
15. How can the following sequence be fixed to show the proper formation of our solar system?
protostellar disk  nuclear fusion  sun  solar nebula  planetesimals  planets
solar nebula  protostellar disk  nuclear fusion  sun  planetesimals  planets
16. What is the law of universal gravitation? States that all objects in the universe attract each other through
gravitational force.
17. As a solar nebula contracts, it begins to rotate faster and faster eventually flattening out into what type of
disk? Protostellar disk
18. What type of planets form from the merger of rocky planetesimals? terrestial planets
19. What type of planets formed in the outer disk, have rocky or metallic cores and deep atmospheres of gas and
ice? gas giants
20. What is an orbit? The path that a body follows as it travels around another body in space.