Identify each statement as either true or false. Identify each statement as either true or false. The greater the mass, the greater the gravitational pull. An object's mass is less on the Moon than it is on Earth. Gravitational pull decreases with an increase in the distance between two objects. The momentum of moving planets does not depend on their masses. If there were no gravity, planets would collide with one another. The Sun revolves in an orbit within our galaxy.

Proteins are made from amino acids. an amino acid has three parts that are joined to a central carbon atom. identify the three parts that create an amino acid.

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?