Which two planets possess the closest length of day? a. Uranus and Neptune
b. Jupiter and Saturn
c. Earth and Mars
d. Mercury and Uranus

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Which of the following best describes the circuit shown below?