Answer:
There are two main reasons. First, Mercury is small and doesn't have much gravity so it's hard to hold onto an atmosphere. Second, Mercury is close to the Sun so any atmosphere gets blasted away by stuff being blown off the Sun.
Explanation:
Because Mercury has no atmosphere, it can't hold onto its heat very well. The night side of Mercury gets very cold, which brings down the average temperature of the planet and makes it only the second hottest planet in the Solar System after Venus.
Why do chemical properties change?
Answer:
because they undergo physical and chemical changes
Answer:
of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change.
Pedigree: Amoeba sisters ( please help asap)
The Roman Numerals represent _____________.
_____________ ______________ ______________, if present, will lead to the expression of dominant traits. Recessive alleles only are expressed if dominant alleles are not ______________.
Answer:
The Roman Numerals reprsent generations.
Recall that in typical Mendelian inheritance, dominant alleles ,if present, will express dominant traits.
Recessive alleles only are expressed when the dominant allele is not around.
Explanation:
2. 1. Your best friend has missed a lot of school recently. Your teacher has allowed you to create a study guide and will let your friend use it on the test.
The guide should include:
• descriptions of amplitude, wavelength, frequency, and wave speed.
• Give examples of the wave relationship between amplitude and wavelength (if there is no relationship, explain how you know)
• Give examples of the wave relationship between wavelength and frequency (if there is no relationship, explain how you know)Text to speech
Answer:
Hi (best friend)! Here is what you missed!
Five wave parameters are defined and measured: the time, the frequency, the amplitude, the wavelength, and the speed. The wave length is the time it takes to pass a full phase. The frequency is just the opposite; it's the number of wave cycles that have been completed in a second.
Lets give a wave of water as an example. Its wavelength is the distance from crest to crest or from trough to trough. The wavelength can also be thought of as the distance a wave has traveled after one complete cycle—or one period. The time for one complete up-and-down motion is the simple water wave’s period T. In the figure, the wave itself moves to the right with a wave velocity vw. Its amplitude X is the distance between the resting position and the maximum displacement—either the crest or the trough—of the wave.
so like i need help pls!!!!!!!!!
Answer: pretty sure it is number 2
Explanation: sorry if i am wrong.
A ____________ is a large body that moves around a star?
PLEASE FILL IN THE BLANK!!!!!
I NEED HELP!!!!!
sorry there's no science section
Answer:
A Planet
Explanation:
The earth for example, is a large body that orbits the sun, our local star
Answer:
Planet
Explanation:
Just like Earth orbits the sun (a star).
Based on The Riddle of the Rosetta Stone, what influence did many people believe Thomas Young had on the findings of Jean-François Champollion?
Many people believed Champollion continued his research because of Young’s encouragement.
Many people believed Champollion learned everything he knew about hieroglyphs from Young.
Many people believed Champollion copied Young’s idea that hieroglyphs represented sounds.
Many people believed Young was the first to inspire Champollion to decipher the writings on the Rosetta Stone.
Answer:B. 0.72 AU
Explanation:
Answer:
it is C
Explanation:
By which mechanism does older oceanic rock move at a ridge?
A) New molten material rises and moves the rock
B) The ridge subducts and moves the rock
C) Continents drift and move the rock.
D) Magnetic forces move the rock.
Answer:
A) New molten material rises and moves the rock
Explanation:
Sixth-grade students conduct a laboratory experiment investigating the flow of thermal energy. They place a sealed plastic bag filled with water at 60°C into a beaker filled with an equal amount of water at 80°C. They then put the beaker with the plastic bag in an insulated container.
Based on the flow pattern of thermal energy, what can students predict will most likely happen in about an hour?
A. Thermal energy will flow from the cooler water in the plastic bag to the warmer water in the beaker so that the temperature of the water in the beaker will be 60°C and the temperature of the water in the plastic bag will be 80°C.
B. Thermal energy will flow from the warmer water in the beaker to the cooler water in the plastic bag so that the temperature of the water in the plastic bag will be 80°C and temperature of the water in the beaker will be 60°C.
C. Thermal energy will flow from the warmer water in the beaker to the cooler water in the plastic bag so that the temperature of the water in both the plastic bag and the beaker will be 70°C.
D. Thermal energy will flow from the cooler water in the plastic bag to the warmer water in the beaker so that the temperature of the water in both the beaker and the plastic bag will be 70°C.
A 2 kg toy car and a 5 kg toy car are pushed with an equal amount of force. Which toy car will have the least acceleration?
Answer:
The 5 kg toy car will have least acceleration
Explanation:
Arthur made a mistake labeling the diagram of the three stages of the cell cycle.
Where is the error in the diagram?
DNA is copied during the shortest stage.
The cytoplasm divides during the longest stage.
The nucleus divides in the stage before the cytoplasm divides.
Both the nucleus and the cytoplasm divide in the same stage.
Answer:
The third one. cell Y only
Explanation:
How is energy involved in physical change?
During phase changes, energy changes are usually involved. For example, when solid dry ice vaporizes (physical change), carbon dioxide molecules absorb energy. When liquid water becomes ice, energy is released. Remember that all chemical reactions involve a change in the bonds of the reactants.
What is a chemical change?
Why do physical properties change?
Why do chemical properties change?
What do the elements within a "period" have in common? (pick one)
A. same number of electrons
B. similar chemical properties
C. equal number of electron orbits
D. equal atomic number
Answer:
All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
Explanation:
Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to go for a run later this afternoon. Rosa is breathing normally. does she need from the food she ate and the air she breathes so that she can go on her run? (Sentence starter: The molecules Rosa needs from the food she eats and air she breathes are.
this science
Explanation:
Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to go for a run later this afternoon. Rosa is breathing normally. does she need from the food she ate and the air she breathes so that she can go on her run? (Sentence starter: The molecules Rosa needs from the food she eats and air she breathes are.
this science
Is a change in matter that produces one or more substances
Chemical change
Physical change
Chemical reaction
Answer:
Chemical change
Explanation:
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. Chemical changes occur through the process of chemical reactions, and the resulting substances have different properties because their atoms and molecules are arranged differently.
its not physical change: What is a physical change? A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.
its not chemical reaction: A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
Hoped this helped and if you can please give brainlist :)
I need an example of Nuclear Chemistry.
Any suggestions...
Answer:
Nuclear fusion: reactions in which two or more elements "fuse" together to form one larger element, releasing energy in the process. A good example is the fusion of two "heavy" isotopes of hydrogen (deuterium: H2 and tritium: H3) into the element helium.
Explanation:
please mark me brainlist
What is another word for property?
Explain the correlation between chemical properties and chemical changes. (plz i not sure on the answer so it would mean a lot if you could help me.)
Answer:
Explanation:
A chemical property describes the ability of a substance to undergo a specific chemical change.
A chemical reaction is a process that occurs when one or more substances are changed into one or more new substances.
Differences
Chemical properties are properties that can be observed or measured when a substance undergoes a chemical change.
Physical properties are properties that can be observed without bringing a chemical change.
Another one
chemical properties; can be used to predict how substances react.
chemical changes; It is mostly used in identifying or describing the substance.
Which of the following equations demonstrates the law of conservation of mass?
Mg + O2 ---> MgO
Ca + F2 --> CaF
Li + N3 --> Li3N
4Na + O2 ---> 2Na2O
Answer:
Mg + O2 ---> MgO
Explanation: V2O5 + CaS → CaO + V2S5. 5V2O5 + 5CaS → 10CaO + 5V2S5. 3V2O5 + 3CaS → 3CaO + 3V2S5.
Define reactant.
Define product.
Define precipitate.
Answer:
Answers below!
Explanation:
Reactant- a substance that takes part in and undergoes change during a reaction.
Product- a substance produced during a natural, chemical, or manufacturing process.
Precipitate- 1. to separate from a solution as a precipitate. 2. to fall to the earth's surface as a condensed form of water; to rain, snow, hail, drizzle, etc.
Precipitate has different meanings so I didn't really know about which one, but tell me if I'm wrong :)
Answer:
Reactant: a substance that takes part in and undergoes change during a reaction.
Product: are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state.
Precipitate: a solid formed by a change in a solution, often due to a chemical reaction or change in temperature that decreases solubility of a solid
Explanation:
These are Chemistry definitions for the terms
What are some examples of physical properties?
What are some examples of chemical properties?
What is a physical change?
What are some examples of physical changes?
Answer:
Physical properties: how soft a blanket it, how hard bread is, what color leaves are, what bleach smells like.
Chemical change: burning wood, rotting food, digestion, rusting of a nail.
Physical change: mixing salt and sugar, tearing a piece of paper, melting ice, chopping wood.
Explanation:
Physical properties are properties that are measurable.
Chemical change is when substances combine (fire and wood make burning wood) to make another substance. They aren't reversible. If you were to melt ice, you could refreeze it, you can't unburn wood.
Physical change is something that alters the form of the substance but not the chemical composition.
Hope this helps!
Answer:
Physical properties:what color leaves are,what bleach smells like
Chemical change:burning wood, rusting of meatal
Physical change:mixing salt and sugar,melting ice
Explanation:
Miguel loves to go hiking. He is taking a hike in the Smoky Mountain National Park in Tennessee. It is a warm summer day. However, as he's hiking, he starts to feel colder. Miguel is confused. He thought the summers were warm in Tennessee. Explain why Miguel is feeling colder as he hikes in the Smoky Mountain National Park.
Answer:
It is getting colder because when you are at higher altitude the pressure gets lower. Causing the temperatures to change as he climbs up
What do Venus and Earth have in common?
their gravities
their temperatures
their atmospheres
their moons
Answer:
I think their atmosphere
Which of the following is the best definition of weather?
a Events that happen over a long period of time
b A pattern of seasons changing over time.
c The atmospheric conditions at a particular time
d A measure of kinetic energy in the atmosphere
Answer:
C
Explanation:
Weather is what is happening at one point in time
Answer:
C.
Explanation:
The atmosphere changes everyday and that is what makes the weather cold or warm.
If two oceanic plates move towards each other at a convergent boundary, then_____ may occur.
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
pick two events
Answer:
I think the answer is Volcanoes.
Explanation:
If the two plates that meet at a convergent plate boundary both are of oceanic crust, the older, denser plate will subduct beneath the less dense plate. The older plate subducts into a trench, resulting in earthquakes. Melting of mantle material creates volcanoes at the subduction zone.
When two oceanic plates converge, the denser plate will end up sinking below the less dense plate, leading to the formation of an oceanic subduction zone. Old, dense crust tends to be subducted back into the earth. An example of a subduction zone formed from a convergent boundary is the Chile-Peru trench.
Hope this helps and if you could mark this as brainliest. Thanks!
can anyone do this?i dont understand it!
What would happen if all the cordgrass was removed from the coast of South Carolina? pls help quickly
Answer:
the common name cordgrass. Adaptation and Distribution Gulf cordgrass grows along the Gulf Coast from Florida to Texas, and South into Eastern Mexico. More rarely, gulf cordgrass grows inland in marshes, swamps, and moist prairies. It can also be found along the Caribbean coasts, and inland in Argentina and Paraguay.
Explanation:
Hope that helped! (can u mark brainliest?)
Answer: Im not sure but ill guess and if its wrong ill tell you the answer once im finished with this
Explanation:
okay i got the test results and the answer is A; There would be rapid erosion from the entire coast, causing cities and homes to fall into the water.
My science teacher trying to be cool
Answer:
omg lol XD
Explanation:
The amount of water vapor in a given volume of air is ______________ .The amount of water vapor in the air at any one time depends on ______________ . Warmer air holds ______________ water thancooler air. Clouds form when humidity is ______________ and thetemperature is ______________ . ______________ humidity is definedas the amount of water vapor in the air ______________ by the amountthat would have to be present in the same air to form a ______________ or condense on a surface. ______________ is related to the humidityof the previous day. The air temperature at which water vapor in the air ______________ onto cool surfaces is the dew point.
word bank
humidity
temperature
more
high
low
relative
divided
cloud
dew
condenses
pls hurry and you'll do gr8 on dis and I rlly need help on dis!
PLS :) I'm cheering 4 u, to help me for Brainliest :)
Energy and Temperature Activity Worksheet
Instructions: Follow the directions below to complete part one and part two of this activity. You will submit both parts once completed.
Note: You are not performing the experiment—only designing it.
Introduction
The purpose of this assignment is to design an experiment that another student could follow and use to test whether land or water heats faster.
You will complete the following:
Part One: Experimental Design. Plan out an experiment by answering the guiding questions below.
Part Two: Design a Lab Report. Write the outline of a lab report so that another student could complete the experiment by using the materials listed below:
sand
water
heat lamps
thermometers
cups
Part One: Experimental Design
In this section, you will think about what type of experiment to set up. Remember, you are NOT completing the experiment, only designing it. If you want to review the scientific method first, use this tutorial. Use these guiding questions to help you design the experiment. Answer each question below:
What hypothesis will the experiment test?
What are the variables?
What purpose would the sand serve?
What purpose would the water serve?
What purpose would the heat lamps serve?
What purpose would the thermometers use?
How can you use these materials to test whether land or water heats faster?
How would you compare whether land or water heats faster?
Within a 24-hour period, at what three points should the temperature be taken? Why?
What would an effective conclusion need to include?
Part Two: Design a Lab Report
Once you have designed the experiment, you must write out the instructions so another student could act as the experimenter and follow them. Fill in the following elements of this lab report as described in italics below.
Lab Report
Objective
Explain the purpose of your lab.
Procedure
List the experiment procedures. Some steps have been filled in for you. You may need to adjust the numbers to match the steps you decide on.
Identify the variables.
Write out your hypothesis in an if/then format.
Gather your materials.
Analyze the data.
Write your conclusion.
Data Analysis
Label a data table so that the experimenter can record observations for the sand and water temperatures at various points.
Conclusion
Explain what the experimenter should include in this section to show how the data proved the hypothesis.
Answer:
the ground would heat up slower than the sand because it has lots of moisture so sand would heat up faster than any thing other than lava
Explanation: