1. Why is it rare for the soft parts of an organism to become a fossil?
The soft parts take a long time to decay.
The soft parts can be eaten by other animals.
The soft parts cannot be buried in sediment.
The soft parts form petrified fossils.
2. Which of the following terms refers to a solid copy of the shape of an organism?
mold
cast
carbon film
trace fossil
3. Which of the following is an accurate definition of relative age?
a rock’s age as compared to the ages of other rocks
the number of years since the rock formed
a rock’s age based on how much carbon-14 it contains
the number of fossils a rock contains
4.
Geologists use radioactive dating for which of the following?
identifying the relative ages of rock layers
determining the absolute ages of rocks
telling how radioactive a substance is
collecting evidence of fossils
5. Which of the following units are in order from smallest to largest?
epoch, period, era
era, epoch, period
period, era, epoch
epoch, era, period
6. Earth’s first atmosphere was composed of mainly which of the following gases?
hydrogen and helium
carbon dioxide and oxygen
nitrogen and oxygen
carbon monoxide and ozone
My Answers:
1. A?
2. B
3.B
4.?
5.D
6.C
1. B
2. B
3. A
4. B
5. A
6. A
did this in my school 100%
1. Why is it rare for the soft parts of an organism to become a fossil?
The correct answer is:
The soft parts take a long time to decay.
The soft parts can be eaten by other animals.
The soft parts cannot be buried in sediment.
The soft parts form petrified fossils.
2. Which of the following terms refers to a solid copy of the shape of an organism?
The correct answer is:
cast
3. Which of the following is an accurate definition of relative age?
The correct answer is:
a rock’s age as compared to the ages of other rocks
4. Geologists use radioactive dating for which of the following?
The correct answer is:
determining the absolute ages of rocks
5. Which of the following units are in order from smallest to largest?
The correct answer is:
epoch, period, era
6. Earth’s first atmosphere was composed of mainly which of the following gases?
The correct answer is:
hydrogen and helium
1. Why is it rare for the soft parts of an organism to become a fossil?
The correct answer is "The soft parts take a long time to decay." Soft parts, such as flesh or organs, tend to decay much faster compared to hard parts like bones or shells. For an organism to become a fossil, it typically needs to be buried rapidly and protected from scavengers and decomposers. In most cases, this does not happen to the soft parts of an organism, making their preservation as fossils a rare occurrence.
2. Which of the following terms refers to a solid copy of the shape of an organism?
The correct answer is "cast." A cast is a solid copy of the shape of an organism, typically formed when minerals fill in the space left by a decaying organism and harden into rock. It preserves the external shape or internal cavities of the organism and can provide valuable information about its structure and form.
3. Which of the following is an accurate definition of relative age?
The correct answer is "a rock’s age as compared to the ages of other rocks." Relative age is determined by comparing the ages of different rocks or geological features. It does not give a specific number of years, but it establishes the chronological order of events. By analyzing the relationships between rock layers, fossils, and other geological features, geologists can determine which is older or younger relative to others.
4. Geologists use radioactive dating for which of the following?
The correct answer is "determining the absolute ages of rocks." Radioactive dating, also known as radiometric dating, is a method used to determine the absolute age of rocks and minerals. It relies on measuring the ratios of certain isotopes, which decay at predictable rates, in the rock sample. By comparing the ratio of parent isotopes to daughter isotopes, geologists can calculate the age of the rock or mineral.
5. Which of the following units are in order from smallest to largest?
The correct answer is "epoch, period, era." The geological time scale is divided into different units to represent different spans of time. From smallest to largest, the correct order is epoch, period, and era. An epoch is a subdivision of a period, and a period is a subdivision of an era. These divisions help geologists classify and organize Earth's history based on significant geological events and changes.
6. Earth’s first atmosphere was composed of mainly which of the following gases?
The correct answer is "hydrogen and helium." According to scientific understanding, Earth's first atmosphere was composed mainly of hydrogen and helium gases. Over time, volcanic activity and the emergence of life forms contributed to significant changes in the composition of the atmosphere, leading to the development of the current composition, primarily nitrogen and oxygen.