According to the fossil record, how long ago do scientists believe life on Earth first appeared?
Answers
Answer:
B
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.
Related Questions
Match each description to the corresponding type of reproduction.
Answers
1.F
2.C
3.E
4.D
5.B
6.A
This should all be correct good luck!
Answer:
The correct answers are listed below:
1.F
2.C
3.E
4.D
5.B
6.A
Explanation:
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
Give at least two reasons why you feel the ecosystem chosen by your group is the best choice. We chose lake. I don't know what to say lol. Will give 69 points.
Answers
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.
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. :)
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
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:
https://brainly.com/question/21106299
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Which statement describes an advantage of an organism that asexually reproduces as compared to an organism that sexually reproduces?
Answers
Which is the oldest rock in this strata?
mudstone
siltstone
limestone
sandstone
conglomerate
Answers
Answer:
I am 100% sure it is the mudstone. I believe they are the oldest rock in existence.
Explanation:
Please tell me if I'm wrong
What are the segments of DNA that code for specific traits called?
Answers
Answer:
it would be C, genes.........
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.
Which of the following are examples of what scientists can learn from studying fossils?
Select all that apply
Answers
Answer:All of them except
What type of plate boundary is in the image below?
Divergent
Convergent
Transform
Answers
Why do regions/places have different types of climates? Try to give an example in your answer
Answers
Answer:
The climate of a region depends on many factors including the amount of sunlight it receives, its height above sea level, the shape of the land, and how close it is to oceans. Since the equator receives more sunlight than the poles, climate varies depending on its distance from the equator.
Answer,because of the bench marks
Explanation:
regions have different type of climates because of various reasons it could be determined by the fove benchmarks equator ,arctic circle,antartic circle,tropic of cancer and capricorn.
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
A wave of infrared light has a speed of 6 m/s and a wavelength of 12 m. What is the frequency of this wave?
A. 0.5 Hz ✅
B. 2.0 Hz
C. 18 Hz
D. 72 Hz
Answers
Answer:
Explanation:
The frequency of the wave is 0.5 hertz.
La frecuencia de la onda es de 0,5 hercios.
Answer:
A. 0.5 Hz.
Explanation:
I know you got the answer, but plz mark me as brainliest. I need a lot of those.
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.
If the normal body cells of an organism each contain 36 chromosomes, how many chromosomes would be found in a gamete produced by that organism?
Answers
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 weather forecast says a high temperature was to be 24°F and the relative humidity was at 93 percent. A fast-moving cold front was moving in her direction. What type of weather should we expect? Explain why you choose that specific storm.
Answers
Answer: a tornado or a snow storm
fast moving cold front was moving in her direction
And usually when the high temperature for the day is 24
°F and the relative humidity is at 93 percent, a snowstorm happens
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:
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:
B
Explanation:
Divide 16.8 by 14
I hope not the best at this stuff
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
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:
https://brainly.com/question/28650063
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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.
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
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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whats is the cell cycle and why is it so important to to our health? no links
Answers
what is the answer to this definition?;
a positive or negative electrical quality.
Answers
Answer:
charge is the answer I'm pretty sure
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
Leaves are a part of a plant’s shoot system. The phloem tissue in leaves transports-
A. glucose produced during photosynthesis
B. oxygen needed to undergo photosynthesis
C. pollen from the stigma to the ovary
D. bacteria needed for nitrogen fixation in roots
thanks!
Answers
Answer:
A.
Explanation:
I'm pretty sure it's A, glucose produced during photosynthesis.:) Hope it helps.
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
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.