Astronauts inside Earth satellites such as the space shuttle are usually said to be in orbit around Earth. Are you in orbit around anything?
A) Yes, around both Earth and the sun.
B) Yes, around the sun due to Earth's motion through space but not around Earth.
C) Yes, around Earth due to Earth's spinning motion but not around the sun.
D) No.
E) Only on Saturdays.
Question 2
The ultimate source of energy from fossil fuels is the
A) Sun.
B) radioactivity in Earth's interior.
C) photosynthesis process.
D) natural processes in Earth's interior.
