BIOLOGY MIDDLE SCHOOL

One isotope of carbon has 6 protons and 8 neutrons. Which is the correct reference for this isotope?A. carbon-6
B. carbon-8
C. carbon-14
D. carbon-2

Answers

Answer 1
Answer: The correct reference for the isotope of carbon that has 6 protons and 8 neutrons is carbon -14. (Solution: C)
Carbon-14, 14C, also referred toa as radiocarbon, is a radioactive isotope.Its atomic nucleus contains 6 protons and 8 neutrons. 
It is used to estimate the date at which an organism died. The reason is because carbon-14 decays at this constant rate.
Answer 2
Answer: 6 + 8 = 14 so the answer is 14

Related Questions

Using the table below, which of the materials would be able to scratch Quartz? Mohs Scale Index Mineral Hardness Common Objects diamond 10 corundum 9 topaz 8 quartz 7 orthoclase 6 steel file apatite 5 glass fluorite 4 calcite 3 copper penny gypsum 2 fingernail talc 1 fluorite talc diamond gypsum
Name the process that causes water to flow into organisms
1.) Explain how you identified the chromosomes in order to place them in the correct pairs.
Coach Wood's class is trying determine what factor is most important in the growth of earthworms. Each day, they take theMETRIC length of four different worms in four different soil samples. Today, it is Moore's turn to measure the earthworms. For theworm above, Moore records a length of 6.0 cm. Explain whether Moore's recording is accurate and why.A)The earthworm length is shorter than 6.0 cm because the worm is curved.B)The earthworm length is shorter than 6.0 cm because Moore used theincorrect units.C)The earthworm length is longer than 6.0 cm because the worm needs tobe straightened.D)The earthworm measurement is accurate because Moore subtracted thebeginning and ending points from the ruler.
Which of the following about abiotic factors in ecosystems is true?a. Abiotic factors in healthy ecosystems are not in balance. b. Abiotic factors are located in the soil of ecosystems only. c. Abiotic factors are part of a dynamic system. d. Abiotic factors in ecosystems are used up by the living components.

Most cells in the onion root are not undergoing cell division and they have a large purple circle inside them. What are the circular structures?

Answers

The purple circular structures are the nucleus.

Classmate states that igneous rock must always become sedimentary rock next,according to the rock cycle. Explain why this statement is not correct

Answers

Using the rock cycle, it shows that with heat and pressure, an igneous rock can turn into a metamorphic rock.

Explanation:

This is incorrect because it can also convert to sediments by weathering, erosion, and deposition. The Rock Cycle is a group of transformations. Igneous rock can transform into sedimentary rock or into metamorphic rock. Sedimentary rock can transform into metamorphic rock or into igneous rock. Metamorphic rock can convert into an igneous or sedimentary rock.
Using the rock cycle, it shows that with heat and pressure, an igneous rock can turn into a metamorphic rock.

If a scientist creates a new rock-like substance in a laboratory, why wouldn't this type of material be classified as a true mineral?Question 5 options:

A There are no planes of weakness in its lattice structure


B It's not a naturally occurring substance


C It's too new to be a mineral


D It would not be hard enough

Answers

B It's not a naturally occurring substance

Minerals are naturally occurring substances that form in geological processes. Since the scientist created this rock-like substance in a laboratory, it wouldn't be classified as a true mineral because it didn't occur naturally in the Earth's geological processes.

The reason why a new rock-like substance created in a laboratory would not be classified as a true mineral is because it does not meet one of the essential criteria for being considered a mineral: being a naturally occurring substance.

Minerals are formed naturally through geological processes over long periods of time. They are typically found in the Earth's crust or other natural environments. However, the substance created in a laboratory is artificially synthesized, meaning it is made by humans in a controlled setting rather than being formed naturally.

For example, if a scientist combines different chemical compounds in a lab and creates a rock-like substance, it may have similar physical properties to a mineral, such as hardness or color. However, since it was intentionally made by humans, it does not qualify as a true mineral.

Therefore, the correct answer is B: It's not a naturally occurring substance

Identify the substance, DNA

carbohydrate
lipid
nucleic acid
protein

Answers

Answer:

nucleicacid

Explanation:

DNA is made of chemical building blocks called nucleotides. ... To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating. The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C).

Explain why scientists think that life on earth began after 3.9 bya

Answers

Answer:

Scientists found evidence such as fossils that were almost 4 billion years old, concluding that life on earth began after that.

Explanation:
They found fossils that were over years old

Explain why carbon dioxide production can be used to determine respiration rate.

Answers

Answer:

The measurement of certain gases, particularly oxygen and carbon dioxide, can be used. This is because oxygen is consumed during this process, and carbon dioxide is produced as a waste product. Different levels of oxygen and carbon dioxide can indicate whether or not a cell has recently gone through respiration.

Explanation:
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