How Old is the Grand Canyon? Quick Check
1. Which concept of relative dating refers to the process of matching similar fossils from different locations?
correlation
law of inclusion
law of crosscutting
uniformitarianism
2. Which describes the difference between the law of inclusion and the law of crosscutting in relative dating of rocks and fossils?(1 point)
Intruding objects are younger in the law of inclusion.
Bottom layers of rock are older only in the law of crosscutting.
Bottom layers of rock are younger only in the law of crosscutting.
Intruding objects are older in the law of inclusion.
3. Use this sentence: A scientist finds fossils of the same marine animal in two distant locations.
Which conclusion statement is correct?
(1 point)
Both areas were covered by seawater at some time.
Water in both areas dried out at the same time.
The fossils closest to Earth’s surface are the oldest.
All rocks in both areas are the same age.
4. Which organism is most likely to leave a fossil record?(1 point)
mushrooms
bacteria
jellyfish
turtles
5. Which statement best describes why most individual organisms never fossilized?(1 point)
Conditions for fossilization are rare.
Chemicals that fossilize organisms are rare.
Only organisms that lived in the ocean fossilize.
Only organisms with hard parts fossilize.
1. Which concept of relative dating refers to the process of matching similar fossils from different locations?
- It's like matching socks from different laundry loads - the concept is correlation!
2. Which describes the difference between the law of inclusion and the law of crosscutting in relative dating of rocks and fossils?
- The law of inclusion is all about intruders being younger, while the law of crosscutting says that bottom layers are older. It's like trying to figure out who's the younger sibling in a family photo.
3. Use this sentence: A scientist finds fossils of the same marine animal in two distant locations. Which conclusion statement is correct?
- Well, it looks like both areas were once covered by seawater. Maybe they had a beach party?
4. Which organism is most likely to leave a fossil record?
- Forget about mushrooms and bacteria, since they're not too good at fossilizing. But turtles, now they're rock-solid contenders!
5. Which statement best describes why most individual organisms never fossilized?
- Well, conditions for fossilization are as rare as finding a unicorn at the supermarket. It's not easy for an organism to leave a lasting impression in the fossil world!
1. The concept of relative dating that refers to the process of matching similar fossils from different locations is correlation.
2. The law of inclusion states that the intruding objects are younger, while the law of crosscutting states that the bottom layers of rock are older.
3. The correct conclusion statement based on the sentence is that both areas were covered by seawater at some time.
4. Turtles are the organism most likely to leave a fossil record.
5. The statement that best describes why most individual organisms never fossilized is that conditions for fossilization are rare.
To answer these questions, we need to understand the concepts of relative dating and fossilization.
1. Relative dating is a method of determining the age of rocks and fossils relative to each other. The concept of matching similar fossils from different locations is called correlation. So, the answer to question 1 is correlation.
2. The law of inclusion and the law of crosscutting are principles used in relative dating.
- The law of inclusion states that if a rock layer contains fragments of another rock layer, the fragments must be older than the layer they are found in. Therefore, intruding objects are older in the law of inclusion.
- The law of crosscutting states that if a rock layer is cut by a fault or an igneous intrusion, the fault or intrusion must be younger than the layers it cuts across. Therefore, intruding objects are younger in the law of crosscutting.
Based on this information, the answer to question 2 is: Intruding objects are older in the law of inclusion.
3. The sentence states that a scientist finds fossils of the same marine animal in two distant locations. From this, we can conclude that both areas were covered by seawater at some time. Therefore, the correct conclusion statement is: Both areas were covered by seawater at some time.
4. Not all organisms leave a fossil record. Mushrooms, bacteria, and jellyfish are less likely to leave a fossil record because they have soft bodies that decompose quickly. Turtles, on the other hand, have hard shells that are more likely to be preserved. Therefore, the most likely organism to leave a fossil record is turtles.
5. Most individual organisms never fossilize because conditions for fossilization are rare. Fossilization requires specific conditions such as rapid burial in sediment, low oxygen, and other factors that can preserve the remains. Therefore, the statement that best describes why most individual organisms never fossilize is: Conditions for fossilization are rare.