1. radioactive decay occurs when atoms
A- lose mass
B- join with atoms of another element
C- break down to form atoms of another element
D- are exposed to chemical weathering
2. if you want to consult the geologic time scale for when the first vertebrates evolved, where would you look?
A- in the section for the Ordovician period of the paleozoic era.
B- in the section for the quaternary period of the cenozoic era.
C- in the section for the triassic period of the mesozoic era.
D- in the section for precambrian time.
3. Earths atmosphere, oceans, and continents began to form during the first several hundred million years of.
A- precambrian time
B- the paleozoic era.
C- the mesozoic era
D- the cenozoic era
4. During the devonian period, animals that could live on land began to evolve. these animals still spent part of there lives in the water. what where these animals called?
A- trilobites.
B- reptiles.
C- amphibians.
D- dinosaur.
5. which of the following events occurred during the mesozoic era?
A- dinosaurs became common on lane.
B- whales and dolphins evolved in the ocean.
C- reptiles evolved on land.
D- the supercontinent Pangaea formed.
6. which of the following vertebrates had the chance to become abundant after the dinosaurs became extinct?
A- woolly mammoths.
B- amphibians.
C- mammals.
D- reptiles.
7. which of the following organisms is not extinct?
A- the dodo bird.
B- the saber-tooth tiger.
C- the saltwater crocodile.
D- the Carolina parakeet.
8. During which section of the geologic time scale did the first modern humans evolved?
A- during the paleogene period of the cenozoic era.
B- during the quaternary period of the Cenozoic era.
C- during the cretaceous period of the mesozoic era.
D- during precambrian time.
9. if a geologist found two fossil of different species buried next to each other in a rock layer, he or she might hypothesize that the two organisms may have been alive during the same time period?
-True
-False
10. a species might become extinct when a disastrous event, such as a meteorite impact, occurs.
-True
-False
I'll be glad to check your answers.
Mrs. Sue is 9 false? Because that's what I got
1. The answer to this question is C- break down to form atoms of another element. Radioactive decay refers to the process in which unstable atomic nuclei release energy by emitting radiation. During this process, the atomic nucleus breaks down and transforms into atoms of a different element.
2. To consult the geologic time scale for when the first vertebrates evolved, you would look in the section for the Ordovician period of the Paleozoic era. The geologic time scale categorizes Earth's history into different periods and eras based on significant geological and biological events.
3. The answer is A- Precambrian time. Earth's atmosphere, oceans, and continents began to form during the first several hundred million years of the Earth's history, which is categorized as the Precambrian time in the geologic time scale.
4. The answer is C- amphibians. During the Devonian period, animals that could live on land began to evolve, but they still spent part of their lives in the water. These animals, known as amphibians, were the early ancestors of vertebrates that could survive in both aquatic and terrestrial environments.
5. The correct answers are A- dinosaurs became common on land and D- the supercontinent Pangaea formed. Both of these events occurred during the Mesozoic era. The Mesozoic era is known as the Age of Reptiles and is characterized by the dominance of dinosaurs and the formation of the supercontinent Pangaea.
6. The answer is C- mammals. After the extinction of dinosaurs, mammals had the opportunity to become abundant and diversified. This happened during the Cenozoic era, which is the era that followed the Mesozoic era.
7. The answer is C- the saltwater crocodile. Among the options provided, the saltwater crocodile is the only organism that is not extinct. The dodo bird, the saber-tooth tiger, and the Carolina parakeet are all extinct species.
8. The answer is B- during the Quaternary period of the Cenozoic era. The first modern humans (Homo sapiens) evolved during the Quaternary period, which is the most recent period in the geologic time scale. This period includes the last 2.6 million years of Earth's history.
9. True. If a geologist found two fossils of different species buried next to each other in a rock layer, it suggests that these two organisms may have lived during the same time period. The relative position of fossils in rock layers can indicate their relative ages and provide insights into the history of life on Earth.
10. True. A species might become extinct when a disastrous event, such as a meteorite impact, occurs. Catastrophic events can lead to mass extinctions by causing widespread destruction of habitats, disrupting ecosystems, and wiping out populations of species.