Question

dinosaurs, small mammals, and birds are found in this time period.
paleozoic era
cenozoic era
mesozoic era
precambrian era
question 11
1 pts
geologists assume the newest rock layers are on top of the older ones, unless some type of disturbance occurs, in known as...
law of inclusion
law of superposition
law of gravity
law of conservation

Explanation:

• First question:
• The Mesozoic era is known as the "Age of Dinosaurs". During this era, dinosaurs were the dominant terrestrial vertebrates. Small mammals also existed (they were mostly shrew - like and nocturnal to avoid dinosaur predation in the early Mesozoic). Birds, which evolved from theropod dinosaurs, also appeared in the Mesozoic era (e.g., Archaeopteryx in the Jurassic period).
• The Paleozoic era was dominated by invertebrates, fish, amphibians, and early reptiles. The Cenozoic era is the "Age of Mammals" (after the extinction of non - avian dinosaurs). The Precambrian is the time before the Phanerozoic eon and lacks the complex multicellular life forms like dinosaurs, birds, and modern - type mammals.
• Second question:
• The Law of Superposition states that in an undeformed sequence of sedimentary rocks, the youngest layer is on top and the oldest is at the bottom.
• The Law of Inclusion states that if a rock body (inclusion) is contained within another rock, the inclusion is older than the rock that contains it. The Law of Gravity is a physical law about the attraction between masses. The Law of Conservation (e.g., conservation of mass, energy) is about the constancy of certain quantities in a closed system, not about rock layer order.

Answer:

• First question: Mesozoic era
• Second question: Law of Superposition