Answer:
How do we know what the temperature of the Earth was in the past? - One way to measure past temperatures is to study ice cores. Whenever snow falls, small bubbles filled with atmospheric gases get trapped within it. In some places, so much snow falls that the older layers become buried and compressed into ice, locking away air bubbles in ice sheets and glaciers
What is the relationship between CO2 (carbon dioxide) and temperature on Earth? - When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down.
What is the greenhouse effect? - the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
Why are global sea levels rising? - Global warming is causing global mean sea level to rise in two ways. First, glaciers and ice sheets worldwide are melting and adding water to the ocean. Second, the volume of the ocean is expanding as the water warms.
Which of the following elements is the most reactive?
A. Mn
B. B
C. Sr
D. Kr
Answer:
The answer to this question is......C
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, Sr is the element which is most reactive. The correct option is option C.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
On going down the group of periodic table, size increases due to increase in number of shells, easiness to eject one electron increases. Group 2 elements are the most reactive as it has only 2 electrons to loose. Sr is the element which is most reactive among all the given options.
Therefore, Sr is the element which is most reactive. The correct option is option C.
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What's the difference between evaporation and distillation with an example.?
Answer:
The main difference between evaporation and distillation is that evaporation is a process that involves a change in the state of matter while distillation is a process of separation. While the vaporization in evaporation occurs below the boiling point, the vaporization in distillation occurs at the boiling point.
Explanation:
Evaporation might occur when the sun heats up a puddle, and the water gets evaporated into the air. Distillation is a process used to purify water, and requires water to be boiled by a stove or fire.
During nuclear fusion, what happens as energy is generated?
A. The mass gets larger.
B. The element becomes magnetic.
C. Some of the mass is converted into energy.
D. The nucleus of a large atom is broken into smaller atoms.
Answer:
C
Explanation:
leftover mass become energy in nuclear fusion
2C4H10 + 13O2 --> 8CO2 + 10H2O
Which is true about the reaction shown above?
The reaction has negative ions in two of the compounds that switch places.
The reaction releases energy.
The reaction is a single replacement.
The reaction has two elements that combine to form a compound.
Answer:
c
Explanation:
PLEASE ANSWER:
An iron nail is left outdoors as part of an investigation to study rust. How would you record data for this experiment? The nail goes from dull gray to a reddish color. What can you infer from this observation?
Imagine you are Dmitri Mendeleev giving a lecture about his periodic table. Write the part of speech that describes the characteristics of a column, or family of elements
Answer:i THINK its " the outside germs can attach to it"
Explanation:
Finish the statement: A dwarf planet…
has enough mass to orbit either a planet or the Sun.
has enough mass to clear its orbit of other objects.
has enough mass to attain a spherical shape.
doesn't have enough mass to have its own moon.
It's not A
Answer:
has enough mass to attain a spherical shape.
Explanation:
hope this helps
NOOO LINNKKKSSS
A terrestrial biome characterized by coniferous evergreen tree's is the
A. tundra
B. savanna
C. temperate deciduous forest
D. taiga
Taiga is a Terrestrial Biome characterised by coniferous evergreen trees.
What is a Terrestrial Biome?A terrestrial biome refer to a geographical area of land that have the same communities of plants and animals and the same climatic confitions. Biomes are classified base on trees, shrubs, and grasses.
Therefore, Taiga is a Terrestrial Biome characterised by coniferous evergreen trees.
Learn more about biomes below.
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need help with this one
Answer:
the other person is correct
Explanation:
because Ik
Animals are identified by their characteristics. Both rabbits and horses are mammals. They share many characteristics. Which of these characteristics do they not share?
A) Number of legs
B) Way that they feed young
C) Type of feet
D) Type of food they eat
Answer:
A or C unless it is a multichoice question if so it is both!
Help help help...?
What's one way we can reduce plastic's impact on the environment?
by shredding it into tiny pieces
by recycling it
by burying it
by burning it
Answer: It could be recycling or burning it. Pretty sure its recycling.
Explanation:
Sorry if this doesn't help.
Sea caves form from waves breaking on a cliff and eroding the rock. Is this a physical or chemical change? [No Links]
Which of the following is the best model to help explain how light behaves as it passes from air and then through a piece of transparent glass? Use evidence and scientific reasoning to support your answer. (It's very important)
The second one since when light is aimed towards transparent glass it does not reflect back to you, and you cannot see it through the glass.
The correct image that shows how the light behaves as it passes from air and then through a piece of transparent glass is second one, because, the light ray will refract or bend when passing to other medium with a different density.
What is refraction ?Refraction is the bending of light as it passes from one medium to another with a different density. The change in the speed of light as it moves from one medium to another causes the bending of the light, resulting in a change in its direction.
The amount of bending depends on the angle at which the light enters the new medium, as well as the difference in the refractive indices of the two media.
Refraction occurs when light passes through materials such as air, water, or glass, and it is responsible for a variety of optical phenomena, such as the way that lenses focus light to create images, the formation of rainbows, and the apparent bending of objects viewed through a glass of water.
Hence, the second image is correctly representing refraction.
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Hi I need help , please help whoever helps I will give them a crown .
Explanation:
Here's what I came up with :)
I need help with this
help plz this is sic
Answer: It is a chemical reaction
Explanation:
Is this statement true or false?
The size and color of an object effects how it moves.
TRUE
FALSE
Answer:
True
Explanation:
The size of an objects effects how it moves
If the size is large the object moves slowly
And if the size is small the object move fastly
Write a 5-6 sentence summary answering the following questions:
- What do you already know about heating devices and ice storms?
- What do you wonder about heating devices and ice storms?
( no random answer or incorrect answers will be flagged)
Answer: ⬇
Explanation:
Heating devices help during an Ice Storm. Heat devices can be used to keep you warm and your family warm. Heating devices are used to also heat your house. Heating devices that run on electricity can also be no help if an Ice storm knocks out the power. Can heating devices run solar?Why aren't towns prepared enough during an Ice Storm?
PLZZZZZ help ASAP!!!!!!! THANK YOU. :) i need all 3 and thank you again!
Help? Tysm if you do :>
Using the graph above, what was the cost of the most expensive invasive species?
200 billion US dollars
10 billions US dollars
148 billion US dollars
50 billion US dollars
Hi , I need help whoever helps me I will give them Brainliest .
Which property do we observe when we watch kids blowing bubbles? a density b color c solubility d flammability
Answer:
its a
Explanation:
We observe when we watch kids blowing bubbles it is a property of density. Therefore, option A is correct.
What is density ?The mass of a material per unit of volume is its density. Density is most frequently represented by the symbol, however Latin letter D may also be used. Mass divided by volume.
A liquid's density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is more dense if you weigh two liquids with similar volumes or quantities. A liquid that is less dense than water will float if it is gradually introduced to the water's surface.
By dividing a material's mass by its volume, the density of a substance may be estimated. The most common units for density are grams per milliliter, or g/mL, which is equivalent to grams per cubic centimeter.
Thus, option A is correct.
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Karen and Mary are camping in the woods. Karen used a match to light a camp fire. As she watched the the flame dance, Mary marveled at how such a little amount of energy (the match flame) could create such a large amount of energy (the fire). How should Karen correct Mary's statement?
Answer:the match didnt have all the energy its all the kindling or fuel in the fire
Explanation:
Can someone please help
Answer:
b
Explanation:
!UPDATE!
Get ready for a HUGEEEE surprise coming up! Hint: Points. LOTS OF POINTSSSS!
Answer:
Yay! Thanks :3 You da best :3
Explanation:
That is alot of points
By which process is sediment laid down?
its a test it's due at 10!
Answer: Deposition? not sure
Explanation:
(HELP) Vanessa is conducting an experiment to see how exposure to different types and amounts of light affects the growth of pea plants. Her results are shown in the data table below.
Light Source Growth (inches)
Sunlight 1.09375
Partial Sunlight 0.81250
Artificial Light 0.78125
No Light 0.43750
To which place can Vanessa round her data values without significantly altering the level of accuracy in her results?
A.
nearest ten inches
B.
nearest inch
C.
nearest hundredth of an inch
D.
nearest tenth of an inch
Can someone help me with this math question plzz thx!!
Answer:
i dont think that is math but i think it might be C
Explanation:
Answering just one is fine. Please help. It's due in less than an hour
Answer:
Q 3: the answer is c, W
hope this helps
What are fossil fuels composed of?
Carbon
Nitrogen
Oxygen
PLEASE HELP ME! THIS IS DUE TODAY AND I NEED TO GET IT DONE!!!
Harper gets up in the morning and uses the toilet. Then, she takes a short shower and brushes her teeth. She goes out. When she gets home, she uses the toilet. Then, she fills the dishwasher and runs it. Before bed, she starts the clothes washer, uses the toilet, and brushes her teeth.
1 : Calculate how much water Harper used during the day. Show your work.
2 : Could Harper use less water? Support your answer with data from your calculations.
Answer:
#1
The answer is 192
Explanation:
Add 5+2=7
7+30+20+50
7+100=107
107+35+25+35
192
:)
Answer #2
Yes Harper could use less water because just for brushing his teeth he used 2 gallons of water.
:)