What best explains the graph shown below?

A. Temperature is dropping because greenhouse gases are high and increasing


B. Temperatures are dropping because greenhouse gases are high and constant


C. Temperatures are dropping because greenhouse gases are low and constant.


D. Temperatures are dropping because greenhouse gases are low and decreasing.

Answer:

I say it is A

Explanation: Because gases can affect tempature.

A scientist observes two stars in the night sky through a telescope. Star A is white in color and relatively dim. The star’s estimated temperature is very high.

Star B is red in color and extremely bright. The star’s temperature is low compared with other stars.

Help the scientist classify the two stars.

Help I Have a 54 in science

Every compound can be represented by a chemical formula. A chemical formula is the set of symbols showing the elements that make up a compound and their proportions. Water’s chemical formula is H_2 ​2 ​​ O. That means a molecule of water contains two atoms of hydrogen and one atom of oxygen chemically bonded. A molecule is a group of two or more atoms bonded together. Molecules can range in size from two to thousands of atoms. A molecule of a compound is the smallest unit of that compound. Every molecule of water has all the physical and chemical properties of water. That’s because every molecule of water is made of the same elements in the same proportions: two hydrogen atoms and one oxygen! Which of the following is a true statement?

A
Every molecule of the same compound will have different properties.

B
Every molecule of a compound has the same proportion of elements.

C
Molecules can be physically separated into smaller units of a compound.

D
Molecules cannot be represented by chemical formulae.

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Which scientist most inspired Darwin to pursue his studies of evolution?

A. Linnaeus, who first proposed that humans and primates are similar
B. Malthus, who thought that populations could outgrow their food sources
C. Linnaeus, who thought that populations could outgrow their food sources
D. Malthus, who first proposed that humans and primates are similar

How are seeds different from spores?


Seeds have endosperm which provides nourishment for a new plant, but spores do not have any stored food supplies.


Spores will germinate and must find good soil to survive. Seeds can survive in extremely harsh conditions.


Spores have an endosperm and involve sperm and egg cells, while seeds do not.


Spores involve egg and sperm cells, while seeds do not.

Calculate the ratio of H+ ions to OH– ions at a pH = 7. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide. Then divide the H+ concentration by the OH– concentration. Record this calculated ratio in Table A of your Student Guide.

Compare your approximated and calculated ratios of H+ ions to OH– ions at a pH = 7. Are they the same? Why or why not? Record your comparison in Table A.

What is the concentration of H+ ions at a pH = 7?

mol/L

What is the concentration of OH– ions at a pH = 7?

mol/L

What is the ratio of H+ ions to OH– ions at a pH = 7?

:1

if you are asked to label the forces that affect the seedling in the image shown, which pair of words and arrows are the most correct to enter into the boxes?







Up stem, up gravity


down gravity, up root


down stem, up root


down gravity, down root

Which is an example of a functional adaption?
A. a brightly colored butterfly
B. birds flying south in the fall
C. the spray of a skunk
D. thorns on a rose

The bending of plants toward the light sources serves which purpose in terms of plant’s metabolism?

In your own words, describe why an astronaut's weight is different on the moon than it is on Earth.

I'M GIVING YOU 100 POINTS FOR THIS AND BRAINLY. PLEASE HELP!!!!
A student at an exhibition looks at a model of Earth, as shown. The model is made using different colors to show water and land on the surface of Earth. The color green shows areas covered in land and blue shows areas covered in water. Each side of the model is shown.



The student learns that the water on Earth is stored in different forms. Water on Earth is broadly categorized into salt water and freshwater. The usability of water depends on the quantity available and its characteristics. The model shows the distribution of water on Earth in various reservoirs.



Normal

Question 27
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The student claims there are large quantities of water immediately available for humans to drink on the surface of Earth. Is the claim given by the student correct? Use evidence from the graphs to describe why or why not.

The student claims there are large quantities of water immediately available for humans to drink on the surface of Earth. Is the claim given by the student correct? Use evidence from the graphs to describe why or why not.

Researchers have been studying how emissions from both volcanoes and human activities, such as the burning of fossil fuels, impact the atmosphere. Both types of emissions contribute to the total CO2 levels in the atmosphere. Graph 2 shows that atmospheric CO2 levels have been steadily increasing over time. This increase in CO2 levels has been linked to the increase in global surface temperatures.

Explain why the total mass of carbon must be decreasing in a different step of the slow carbon cycle based on the on the increase in atmospheric CO2.

How does energy provided by the sun influence global patterns of atmospheric movement and the temperature?

What effects does cell differentiation have? Please help I will give Brainliest.

You are looking out over the ocean and see this:

What can you know about the tide?

Please Help now! Thanks!

HELP ME PLEASE I REALLY NEED IT

PLZ HELP! ILL GIVE BRAINLIEST I REALLY NEED HELP
plz....

Fill in the Blank Complete the following sentence. If experiments support the existence of a new phenomenon, then the original theory may be
____________

Will give brainiest if i can

Does anyone know something that I could do to help myself focus bcs I have ADD and I'm failing?

What are some important functions cells perform in the human body?

Which is the sequence by which natural selection works?
A. Selection ---> Adaption ---> Variation
B. Selection ---> Variation ---> Adaption
C. Variation ---> Adaption ---> Selection
D. Variation ---> Selection ---> Adaption

Fill in the Blank:

Word Bank:
Decreases, Increases, Daughter, Replicates, Surface Area, Translates

As a body cell grows, the ratio of _______ to volume _________. Before it grows to large, a cell will divide into two ________ cells. So that each new cell receives its own genetic instructions, the cell ________ or copies, all of its DNA.

Need help from a pro. This is due at the end of today ( 12/3/20 )

What can scientists learn about fossils using techniques of absolute age-dating?
A. estimated ages of fossils in rock layers.
B. precise ages of fossils in rock layers.
C. causes of fossil disappearances in rock layers.
D. structural similarities to other fossils in rock layers.

Which of the following provides evidence that supports the continental drift theory?

Fossils of the same organisms found in different continents
Magnetized rocks that do not match with the poles
Seafloor spreading
Volcanic activity

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. A physical change doesn’t break the bonds between atoms of a substance or form new ones. Compounds can be broken down by a chemical change. A chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. What simple substance would a compound break into? The basic elements that make it up! For example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. Which of the following is an example of a chemical change?

A
separating water into different glasses

B
breaking frozen ice cubes with a hammer

C
running an electric current through water

D
boiling water to evaporate it on a stove

help please fill in the blank
The mass of an object is 45 kilograms. Its weight on Earth is(blank)newtons, and its weight on the Moon is (blank) newtons

Gravitational force is 9.8 m/s2 on Earth and 1.6 m/s2 on the Moon.

Which type of fossil forms through carbonization?
A. Cast
B. Mold
C. Fossil Film
D. Trace Fossil