8. Analysis of a basalt rock sample shows that 12.5% of its radioactive potassium-40 remain undecayed.
How old is the basalt?

Answers

Answer 1
Most of the Moon's basalts erupted between about 3 and 3.5 billion years ago, but the oldest samples are 4.2 billion years old, and the youngest flows, based on the age dating method of crater counting, are estimated to have erupted only 1.2 billion years ago.

Related Questions

How would the acidic solution affect a clam living in the ocean ? what does a weakened shell mean for the clam​

Answers

Answer:

Ocean acidification makes it harder for clams and mussels to find the material they need to build and maintain their calcium carbonate shells. A weakend shell often results in but is not limited to the organisms growing slowly or neededign more food to actually survive if the acidity levels were to increase.

Explanation:

What are the five layers of the atmosphere in order from bottom to top?

Exosphere, Stratosphere. Thermosphere, Mesosphere. Troposphere

Troposphere, Stratosphere, Mesosphere. Thermosphere, Exosphere

Stratosphere, Thermosphere, Mesosphere, Troposphere, Exosphere​

Answers

Answer:

The atmospheric layers start from the ground level of the earth and rise up to a certain height according to its temperature, pressure, composition, and other properties. From the ground level they are:

Troposphere:- (0 -12 km) or (0 to 7 miles)

Stratosphere:- (12 -50 km) or (7 to 31 miles)

Mesosphere:- (50 -80 km) or (31 to 50 miles)

Thermosphere:- (80 -700 km) or (50 to 440 miles)

Exosphere:- (700 -10000 km) or (440 to 6200 miles)

Explanation:

Answer:

this is the answer

Explanation:

which gas is produced during phamentation​

Answers

Answer:

carbon dioxide gas

Explanation:

Which organism shown in the diagram serves as the foundation, or base, for the food web?
hawks
snakes
mice
lizards
plants
grasshoppers
chickadees

Answers

the base would be the beginning of a thing right?

and if it is then plants would be the base

but if it's not then I'm sorry,

but if it's the thing that all the things can eat (except plants) then maybe lizards

srry if I'm wrong ;-;

(07.03 MC)
An advantage of disposing of municipal solid waste in a landfill rather than in an
incinerator is that, unlike incinerators, landfills
can be used to generate electricity
do not require electricity to operate
do not contribute greatly to smog or acid rain
can store hazardous materials such as motor oils and pesticides

Answers

the use electricity more

Answer:

I and III only

Roots do all of the following, except ______.
A. absorb water

B. anchor plants in the ground

C. photosynthesis

Answers

Answer:

C. photosynthesis

Explanation:

The main function of roots is to transport water and nutrients to the plant, photosynthesis happens in the chloroplast.

explain why most enzymes perform poorly at low temperatures​

Answers

Answer:

Due to Kinetic energy

Explanation:

At low temperatures enzymes are simply inactive. As temperature is increased the enzymes and substrate gain kinetic energy

¿De qué manera participa el sistema glandular en la regulación del equilibrio del agua y las sales minerales en el organismo?

Answers

Glándulas suprarrenales: hay una de estas glándulas encima de cada riñón. Produce corticoesteroides, que regulan el equilibrio entre sales minerales y agua, el metabolismo, el sistema inmunitario y el desarrollo y la función sexuales.

Which of the following is NOT an example of evidence that supports the theory of evolution?
A. common genetic ancestors among diverse species
B. fossil evidence suggesting ancient genetic ancestors
C. unnecessary or nonfunctional organs in modern species
D. fossils of the same species found diverse geographic locations

Answers

The answe is D because location has nothing to do with genetics

The statement that is not an example of evidence that supports the theory of evolution is fossils of the same species found in diverse geographic locations.

What do you mean by Evolution?

Evolution may be defined as a gradual and continuous process that runs over many generations, during which species of animals, plants, or insects slowly change some of their physical characteristics.

Common genetic ancestors may be diverse into the number of other species due to the theory of evolution. Unnecessary or non-functional organs may be eliminated or shortened due to evolution.

Therefore, the statement that is not an example of evidence that supports the theory of evolution is fossils of the same species found in diverse geographic locations.

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Which of the following are true about the Cambrian explosion?

Fossil evidence is found in the evaporites in Texas

A diversity of different phyla with huge anatomical differences all appear at once in the fossil record

Fossil evidence is found in the Burgess Shale

provides evidence for many transitional species with very little anatomical difference

Marks the beginning of the Paleozoic era

It marks the beginning of the Cambrian period

Answers

Answer:

b I think but I am not sure but have a good day

What is the condition of outside air a certain time and place

O Climate zone

O Weather

O Climate

O Element

Answers

the would have to be weather

what 2 factors will the selectively permeable cell membrane use to select what can enter or leave the cell? I wrote size but what else?​

Answers

The cell membrane is semipermeable (or selectively permeable). It is made of a phospholipid bilayer, along with other various lipids, proteins, and carbohydrates.

Don’t understand need help

Answers

Answer:

I think c

Explanation:

I took the quiz but I m not sure

The term "net energy” refers to the amount of energy available from a resource minus the amount of
energy needed to make it available.
a. True
b. False

Answers

Answer:

True

Explanation:

A) If a female spinach plant with green (GG) leaves is crossed (pollination and fertilization occur) with a male spinach plant with purple (gg) leaves. What are the genotypes of the offspring and what traits will they express including the probability or ratio.

Answers

Answer:

The genotype Ratio is 1. All are Gg.

The phenotype is all Green spinach

Explanation:

Punnett Square:

    G                G

    _________________

g   |   Gg         |     Gg          |

    |________|________  |

g   |    Gg        |     Gg          |

    |________|________  |

The genotype Ratio is 1. All are Gg.

The phenotype is all Green spinach

Describe asexual reproduction in your own words

Answers

Explanation: person,organism. that has no sexual feeling or thoughts about it  

Answer:

Asexual reproduction is the process where an organism gives life to an identical genetic offspring, multiplying themselves

Explanation:

What type of dominance is it when BOTH alleles for a trait are expressed in offspring?

Recessive

Incomplete dominance

Codominant

Complete dominance

Answers

Answer:

Codominant

Explanation:

What kinds of Bacteria helps farmers?

Answers

Answer: Nitrogen-fixing

Explanation: Nitrogen-fixing bacteria (shown here in a soybean root) are able to convert nitrogen from the air into a form that plants can use

Identify the factor below as genetic or environmental factors that may influence susceptibility to disease?

Answers

Answer: in order age to exercise,

genetic, environmental

PLEASE HELP ITS DUE IN 3 HOURS!! 6. Match the correct definition to each vocabulary term:


Answers

Answer:

In order from top to bottom

C

A

E

D

B

Explanation:

1) Reflection is when a ray hits something reflective then bounces back. For example, light reflects off a mirror, which is why you can see yourself in a mirror.

2) Wavelength measures the size of a wave. It is measured from the crest or trough of one wave to the crest or trough of another.

3) Refraction occurs when waves go through different mediums at different speeds. This is why a straw looks bent when in water.

4) Frequency is a way of measuring the speed of a wave. It shows how many waves pass every unit of time.

5) Absorption means that all of the waves were absorbed into the medium and none of them passed through.

The diagram shows part of an aquatic food web
for a stable lake ecosystem in Connecticut.
Turtles
Large fish
Small fish
Aquatic insects
Tadpoles
Water fleas
Rotifers
Algae
What is the source of energy for the algae?
A waves
B. sunlight
C. bacteria
D. rotifers, water fleas and tadpoles

Answers

Answer:

Sunlight

Explanation:

I just got it wrong because of the wacko below or above me gave me the wrong answer

Algae possess chlorophyll in their cells. They use carbon dioxide in a manner that is analogous to how we use food. Thus, option B is correct.

What is a characteristic feature of algae?

By converting light energy to chemical energy through the process of photosynthesis, carbon dioxide and water are transformed into organic molecules.

Nearly all algae engage in the process, and in fact, much of what is currently known about photosynthesis was first uncovered through research on the green alga Chlorella.

Like other plants, algae benefit from sunlight, therefore denying them of it will limit or even completely stop their growth. For several days, completely shading the tank or aquarium from light is essential.

Therefore,  algae require sunshine because algae can photosynthesize, or use sunlight to change carbon dioxide into biological material.

Learn more about algae here:

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2. The formation of a new community where another community already exists is known as ______.
A primary succession
B secondary succession
C pioneer community
D pioneer species​

Answers

Answer:

B secondary succession

Explanation:

3. Are vaccines available to prevent HIV and cancers?
(3)

Answers

es | HIV.gov
There is currently no vaccine available that will prevent HIV infection or treat those who have it. However, scientists are working to develop one.

List four real-life scenarios where the human body may have to undergo lactic fermentation.

Answers

cheese, yogurt, buttermilk, sour cream, and pickles are lactic acid fermenters. Yogurt and cheese both start with a source of sugar (i.e., lactose from milk).

Hope this helped

Lipids contain instructions for creating proteins and are passed from parents to offspring.

Select one:
True
False

Answers

False, Nucleic Acids do.

what does jaws of life do​

Answers

Answer:

The "Jaws of Life" is a crucial tool to fire and rescue squads to save hundreds of lives every year. ... The “Jaws of Life” is used indeterminately for pretty much any type of heavy-duty tool that acts like a pair of scissors, cutter, spreader, or ram-device aimed at slicing and dicing through most automotive metals.

Explanation:

is used for pretty much any type of heavy duty tool

name the two worst extinctions known in Earth’s history.

Answers

Explanation:

Permian Triassic Extinciton

Lots of places were affected, extinction; in species, vertebrates, etc, etc.

Devonian extinction

Extinction-- in marine species...

Which phyla have well developed nervous system

Answers

Explanation:

Cnidarians

.............

1 point
1. Carla is bringing her 2 year old brother to Montgomery Days. Tired of
listening to him talk, Carla buys him a big wad of cotton candy. An hour
later she notices her brother has a ton of energy! Cotton Candy must be
high in what type of macromolecule and why? *
Carbohydrates; provide short term energy
Macromolecules; provides all the structures with nutrients
Proteins; provides short term energy
Lipids; provides long term energy to keep the kid wound up for hours

Answers

Answer:

Lipids; provides long term energy to keep the kid wound up for hours

Explanation:

When you give a child sugar they will have energy for a while

Lipids are present in the cotton candy which makes it high for hours. option D is correct.

What are lipids?

A lipid is any of various organic compounds that are insoluble in water. They include fats, waxes, oils, hormones, and certain components of membranes and function as energy-storage molecules and chemical messengers.

Lipids provide long-term energy to keep the kid wound up for hours. Some of their main functions include energy storage, hormones, and cell membranes.

Learn more about lipids here:

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What three properties of water cause the oceans to change temperature so
slowly?

Answers

Answer:

because it has highest specific heat capacity

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"As clear as crystal." Ironic or not? What does it mean when a food is low on the glycemic index?It contains fewer carbohydrates than foods that are high on the indexIt is less bulky and easier on the digestive system,It does not affect blood sugar as much as those high on the indexIt contains more calories than foods that are high on the index, Find the length of the side labeled x. Round intermediate values to the nearest 10th. Use the rounded values to calculate the next value. Round your final answer to the nearest 10th A rectangle is 17 inches long and 7 inches wide find the area 6. What was the New Deal? *O A. AllyO B. The Opposite of the OLD DEALC. The stock marketD. Economic and social recovery/reforms by FDROther: Which new transportation route was intended to stretch from the East Coast to the Mississippi River and was financed by the federal government? A 30-ft cable is stretched from the top of an antenna to an anchor point 12-ft from the base of theantenna. How tall is the antenna? Round to the nearest tenth of a foot. (7q+7)+(9q+1)please help How can Congress initiate the formal constitutional amendment process? Which of the following statements are true about a strong base and a weak base at a pH of 11?A. The weak base will require less HCl to bring the pH to 7 than the strong base.B. The strong base will require less HCl to bring the pH to 7 than the weak base.C. Both bases require the same amount of HCl to reach pH 7 because they are both at the same initial pH.D. HCl will not bring the pH of either solution to pH 7. Linda just bought 7 bags of 14 cookies each. She already had 8 cookies in a jar. How many cookies does Linda have now? x^2-6=2-18x solve by completing the square Given the coordinates for the function below, which of the following are coordinates for its inverse? Rewrite the expression in the form x^n the lenght of an arc in a circle with diameter 10 inches is 1.25 inches. determine the measure of the arc. a rectangular window dimensions areX by X +2 and window has a 3 inch frame all the way around the total area of the window and frame is 195 in Who painted The Starry Night? STIs including HIV and AIDS.Provide Four reasons how physical activity can benefit your mental health.Some sporting activities are often associated with a particular gender. Imagine that archaeologists found one of the following new pieces of evidence. Which one suggests that the theory that early humans came to the Americas from the Siberian region is not true?A. Archaeologists discovered signs of green landscapes and bodies of water in the regions where the early humans from Siberia first landed.B. Archaeologists discovered the presence of animals such as deer and rabbits before the arrival of early humans from Siberia.C. Archaeologists discovered barren land and infertile soil in the Americas before the arrival of early humans from Siberia.D. Archaeologists discovered evidence of travel between Asia and the Americas before the arrival of early humans from Siberia.Reset Next regalo puntos y me dan su ID en free fire o el nombre como sale tengo 12 aos