Mineral a is purple. mineral b is black. both minerals leave the same color streak. which of the following statements is true? a. both minerals have the same true color. b. both minerals have identical physical properties. c. mineral a is made from different elements than mineral b. d. mineral b is a gem, but mineral a is a common mineral.

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet? the planet started to cool and an atmosphere formed. the planet started to become round and heat up. the planet started to wobble and turned upside down. the planet started to compress rock and form more radioactive elements.