Answer:
true
Explanation:
I did this unit for science
Answer and Explanation:
The main source of earth magnetic field is the metals and iron present in earth crust these metals are mainly found in liquid state in earth crust and we know that whenever there is spinning of these liquid metals then there will magnetic field generate, So the main source of earth magnetic field is the metals present in earth crust.
You are correct earth science is studied to predict planetery changes
<span>A motor produces less mechanical energy than the energy it uses because the motor looses some energy to heat.</span>
