The two factors that combine to keep Earth and the moon in their orbits are gravity and inertia. Correct answer: D
The gravity is an invisible force that pulls objects toward each other. This force keeps all of the planets in orbit around the sun. Inertia on the other hand is the tendency to resist changes in their state of motion.
Gravity and Inertia.
the crust and the upper mantle
the continental crust and the oceanic crust
the upper and lower mantle
2. Earth's thin, rocky outer layer is its _____.
core
mantle
outer core
crust
3. Earth's core is made of an alloy of _____.
iron and nickel
copper and iron
zinc and magnesium
iron and zinc
B. The presence of predators
C. A forest fire that was caused by lightning
D. An outbreak of wasting disease in elk
Answer:it established a list of necessary tools for research
Explanation:
Answer:
A.
constitution
Explanation: