According to the fossil record, how long ago do scientists believe life on Earth first appeared?

Answers

Answer 1

Answer:

Explanation:

We know that life began at least 3.5 billion years ago, because that is the age of the oldest rocks with fossil evidence of life on earth.

Answer 2

i believe it is 3.5 billion years ago

Related Questions

If a truck that is traveling at 15 mph speeds up to 45 mph in 10 seconds, what is the truck’s acceleration?
PLZ HELP!!!! I NEED A ANSWER AND THE FIRST ONE TO ANSWER WILL GET A BRAINLIEST!!!!

Answers

Answer:

3miles per hour^2

Step-by-step explanation:

given data

initial speed u= 15mph

final speed v=45mph

time taken t= 10 seconds

Step two:

Required

acceleration a=?

applying the first equation of motion

v=u+at

substitute we have

45=15+a*10

45=15+10a

make a subject of the formula

45-15=10a

30=10a

divide both sides by 10

a=30/10

a=3miles per hour^2

Answer:

3m/s

Explanation:

15mph is the intial and 45 is the final subtract them and divide by ten

Match each type of fossil to the description that best matches.

Answers

First is c
Sec is d
Third is b
Fourth is a

I believe this is right

The first should be C, second is D, third is B and fourth will be A.

Which of these is known as a push or pull upon an object that results from its interaction with another object?
Please choose the one below.

speed

velocity

acceleration

force

Answers

Answer: it is force

Explanation: bro comeeeeeeeeeeee on please does this platform actually have challenging questions.

IT IS EASY PLEASE GO AND STUDY AND STUFF CHEATING

Answer: Forcé

Explaination:

How are seatbelts related to inertia? Write you answer in complete sentences.
I need answer asap!!!

Answers

Answer:

Inertia- the tendency of an object to resist a change in velocity

Explanation:

Say a car was going at 65 MPH, but suddenly stopped. For all of the people in that car, their bodies would keep moving forward at 65 MPH until stopped by an equal force (say, the thing right in front of each person) The seatbelt is there to protect you from your own inertia.

Answer:

inertia is the constant state of movement so seatbelts stop that when you stop the car.

plz help me now !!!!!!!!!!!!!!!!!!!!

Answers

Answer:

imagine 2

Explanation:

tha is the answer

Answer:

I think the answer is image 2

Explanation:

Characteristics of physical properties include: (check all that apply)
Group of answer choices

B. Properties that can be observed without changing the identity of the object or substance

A. Properties that we see through a change of color

D. None of these

C. Color, shape, size, density, density

Answers

-Properties that can be observed without changing the identity of the object or substance
-Color, shape, size, density

The answers are B and C
Hope this helps

Need help pls due
Pls help

Answers

Answer:

This may be the case because of the placements of the spread. While one is more cluttered, the other is a bit more spread apart. Meaning that the GeoChart on the right must have more cases, exactly because of their population.

The flu speeds more, the more dense the city.

Match each type of fossil to the description that best matches.

Answers

Answer:

1. B. 2. D. 3. A. C.

Explanation:

That's the best I could do. With it so blurry.

Answer the question below i give brainliest

Answers

Answer:

The team members shared their graph with other sports teams at their school.

Explanation:

This sentence talks about them sharing (COMMUNICATING THEIR RESULTS) to other teams of the same school. The other sentences say what they did for the experiment and what happened.

pls mark brainliest and happy new year!

Answer: The team members shared their graph with other sport teams at their school

this part of the passage describes communicating the findings

pls mark me brainiest

Place the steps of sexual reproduction in order starting with the first step at the top.

Answers

Answer:

1, 3, 2, 4

Explanation:

Hope this helps. :)

That person is right

The following table was made to compare rocks and minerals. What information in the table needs to be corrected?

A. Rocks do have specific chemical compositions and minerals do not have specific chemical compositions.
B. Rocks include granite and marble, minerals include quartz and diamond.
C. Rocks do have specific chemical compositions and minerals do as well.
D. Rocks include quartz and diamond, minerals include granite and marble.

Answers

C! I hope this helped :)

The correction that is needed to be made is that rocks do have specific chemical compositions and minerals do as well. The correct option is C.

What are minerals?

Minerals are elements found on the Earth and also in foods which our bodies require for normal development and function.

Minerals generally have certain specific chemical compositions, but it is not in case of rocks.

Thus, the correct option is C.

For more details regarding minerals, visit:

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the photo shows a frozen fruit pop on a hot day. in which direction in thermal energy flowing

Answers

Answer:

The answer is A.

Explanation:

A is the answer to the question

help pleas im super slow i hate science

Answers

Answer:

I think it's option c 'Biotic and Abiotic'

Biotic and abiotic factors

PLZ HURRY 5 MINUTES LEFT
03.05 The Atmosphere and You Lab Report
1. Summarize how the carbon emissions affected the atmospheric temperature in each of the three scenarios:
o Scenario One:
o Scenario Two: Carbon dioxide emissions decrease
o Scenario Three:
PLZ HELP I NEED 1 AND 3

Answers

Answer:

This is fun youyr are best I am worst this means your happy but I am not

Explanation:

This is fun more than you and I think it's better than today and tomorrow so that's why this will be fun this question is long and the answer is short. Thanks to brainly and my brain

In which direction does friction act?
1. in the same direction as the motion
2. at right angles with the motion
3. the opposite of the direction of motion
First one to answer will get a brainliest!

Answers

Answer:

3. the opposite of the direction of motion

Explanation:

this is to slow down the movement of the object sliding on a surface

the opposite of the direction of motion

A student is trying to make a structure to conduct heat quickly during cold winter days.

Which material should the student use?

A. wood

B. plastic

C. glass

D. metal

Answers

Metal because it is the best conductor.

A student who is trying to make a structure to conduct heat quickly during cold winter days. The student should use metal for heat conduction. Thus, the correct option is D.

What are metals?

A metal is a material which is when prepared freshly, polished, or fractured, shows the lustrous appearance, and also conducts electricity and heat relatively well through them. Metals are typically ductile in nature i.e., can be deformed into a thin wire and malleable. All of these properties are the result of the metallic bond which is present between the atoms or molecules of the metal.

Metals are the cationic elements. These are positively charged due to the loss of electrons from the valence shells. There are about 70 metals out of 92 natural elements present in the periodic table.

Therefore, the correct option is D.

Learn more about Metal here:

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How do you know that an object in space is moving through the sky?

Answers

Answer:

See explanation

Explanation:

Objects in the sky could really be moving. You and tell if you stand vary still and focus on the object. Or they reflect our motion through space, which makes it look like the object is moving.

Just look at it or measure the angle of the object from your position and see if it has change relative to your location and not the orbiting of the earth around the sun

HURRY UP PLSS! Complete the passage to summarize factors affecting the speed of a wave.

The material or substance that a wave moves through is called a _____.

. The medium affects the speed of the wave that passes through it. One factor that affects the speed of a wave is the _____

of medium. Some waves move faster in solids and some waves move faster in liquids and gases. Another factor that affects wave speed is the ________

of the medium.

Answers

Answer:

1. medium

2. Type

3. Temperature

got the answer from brainly

Answer:

The material or substance that a wave moves through is called a medium.

The medium affects the speed of the wave that passes through it. One factor that affects the speed of a wave is the Type.

of medium. Some waves move faster in solids and some waves move faster in liquids and gases. Another factor that affects wave speed is the Temperature of the medium.

Explanation:

im not copying anyone, im just putting this up there so that the one who is the owner of these words in Bolded text gets the reward not me.

What two processes are involved in sexual reproduction, but not asexual reproduction, that increase genetic diversity?

Choose all that apply.

Answers

Explanation:

A B C these are the answer

Answer:

C, Meiosis and fertilisation

Explanation:

Mitosis happens in both animals and plants with their cells, thus the only answer without mitosis is correct. :)

How are seatbelts related to inertia? Write you answer in complete sentences.
I need answer asap!!!

Answers

Answer:

Seat belts are in cars to the effects of inertia. ... When the car hits the wall, you would keep moving in a straight line and at a constant speed until the dashboard applies a force. Seat belts hold you and passengers down, protecting them from their own inertia.

Explanation:

their is the answer so okay

Answer:

Inertia is the tendency of an object to resist a change in velocity.

When a car stops suddenly, your body is still going at the same speed the car was before it stopped (say 65 MPH). Without the belt strapping you in from behind, you would fly forward at nearly that same speed (65).

But thanks to the seatbelt, it stops your body's inertia.

can someone tell me for these 2 questions

Answers

Answer:

Enzymes

Stamen

Explanation:

You're correct for the first question, the second question's answer is Stamen.

Answer:

Enzymes

Stamen

Lauren wants to know which location in her apartment is best for growing African violets. She has three African violets. She puts one on the balcony, one by the kitchen windows, and one on the mantel in the living room. Each plant has the same pot and the same soil, and Lauren gives each plant the same amount of water. Which is the independent variable?

Answers

Answer:

First, before determining which variable is which, we go over the definition of each. The independent variable is the one which is intentionally changed in order to investigate its effect on the dependent variable. The dependent variable is monitored and changes occur in it due to the changing conditions of the independent variable. In this case, the location of the African violets is the independent variable as it is intentionally changed, while the rate of growth of the African violets is the dependent variable as it is being measured.

What causes polar jet streams to form?
Ocean currents change the temperature of air masses. Cold ocean currents transport heat from the equator to the poles.

Ocean currents change the temperature of landmasses. Cold ocean currents transport heat from the equator to the poles.

Ocean currents change the temperature of landmasses. Warm ocean currents transport heat from the equator to the poles.

Ocean currents change the temperature of air masses. Warm ocean currents transport heat from the equator to the poles.

Answers

Answer:

i think that it is the last one: Ocean currents change the temperature of air masses. Warm ocean currents transport heat from the equator to the poles.

Explanation:

hope this helps!

I’m almost positive it’s the last one :)

In 14 days, the daily high temperature in Cedar Hills dropped by 16.8 degrees Fahrenheit. What is the average daily rate of change in the high temperature in degrees Fahrenheit?
A. +2.2
B. +1.2
C. +1.1
D. -1.2
E. -2.2

Answers

Answer:

Explanation:

Divide 16.8 by 14

B or C

I hope not the best at this stuff

Which best describes the relationship between chromosomes, genes, and inherited traits?

Answers

Answer:

Genes are located within chromosomes. Genes determine the passing and expression of inherited traits from parent to offspring.

Explanation:

YW!

What makes greenhouse gases different from other atmospheric gases?

Greenhouse gases reduce the amount of natural resources on Earth.

Greenhouse gases allow thermal energy to pass through the atmosphere and back out into space.

Greenhouse gases account for the direction in which water and air move.

Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth.

Answers

Greenhouse gases allow thermal energy to pass through the atmosphere and back out into space

Explanation:
Greenhouse gases are transparent to incoming (short-wave) radiation from the sun but block infrared (long-wave) radiation from leaving the Earth’s atmosphere

Greenhouse gases are different from other atmospheric gases for the following reason:

Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth.

Thus, the correct option is D.

What are greenhouse gases?

Greenhouse gases may be defined as those gases that absorb infrared radiations which are competent to trap heat. Some examples of greenhouse gases are carbon dioxide, methane, CFCs, nitrous oxide, etc.

Greenhouse gases are more complex as compared to other gas molecules in the atmosphere. It has a structure that makes such gases more competent to absorb heat and radiate back to the Earth's surface. These gases trap the ultraviolet radiation from the sun and emit toward the earth's surface. Such gases are responsible for greenhouse effect.

Greenhouse gases are harmful to the environment as well as the health of living entities that constantly living in various ecosystems of the environment.

Therefore, the correct option for this question is D.

To learn more about Greenhouse gases, refer to the link:

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Which is the youngest rock in this strata?

mudstone

siltstone

limestone

sandstone

conglomerate

Answers

Answer:

I think it is sand stone I hope it is right

Mudstone because the first layer is the youngest Believe me :)

Chickens express three variations for feather color: white, black, and black and white speckled. The genotypes are below:

WW = white
BB = black
WB or BW = black and white speckled

Which conclusions about these two traits are valid?

Answers

Answer:

B. White feather color is dominant and black color is recessive.

Explanation:

White people were dominant over blacks in the 17th century to right now. The whites have more power over blacks.

hope this helps.

What type of plate boundary is in the image below?

Divergent

Convergent

Transform

Answers

Convergent hope this helps you

what is the answer to this definition?;
a positive or negative electrical quality.

Answers

Answer:

charge is the answer I'm pretty sure

The answer is Charge.

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