Mass is measured in
or kilograms.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils