Answer:
Add solute to liquid until dissolving stops.
Evaporate a solvent from a solution until the solute begins to crystallize or precipitate.
Add seed crystals to a solution that is supersaturated.
Explanation:
1.Which of the following is an example of a non-renewable resource?
A.Wind
B.Solar (Sun)
C.Trees
d.petroleum
2.Burning fossil fuels releases which gas into the air, making the Earth warmer?
A.Oxygen
B.Water
D.Nitrogen
D.Carbon Dioxide
Explain why there would be many more plants in an ecosystem than ape-x consumers. I NEED THIS PLS
Answer:
Biomass decreases with each trophic level. There is always more biomass in lower trophic levels than in higher ones. Because biomass decreases with each trophic level, there are always more autotrophs than herbivores in a healthy food web.
Explanation:
there's your answer.
( 15 points to whoever replies quickest no links pls ) a farmer has used a fertiliser containing ammonium nitrate, potassium nitrate and ammonium sulphate on his fields but some may have leached into a nearby river. If a sample of river water was tested, what colour would the flame be if there was fertiliser contamination
If water of the river was tested there would be orange color flame.
What is fertilizer?Millions of tons of air, natural gas, and mined ores are transformed into plant nutrition products based on the three crucial nutrients nitrogen, phosphorus, and potassium by the fertilizer industry.
The process begins by combining nitrogen from the air with hydrogen from natural gas at high temperature and pressure to produce ammonia, which is then used to make nitrogen-based fertilizers, the largest product category. Natural gas is used as a raw material for about 60% of the time, while the remaining 40% is used to power the synthesis process.
The nitric acid created from the ammonia is combined with it to create nitrate fertilizers like ammonium nitrate (AN). Urea can also be made by combining ammonia with liquid carbon dioxide. To create UAN (urea ammonium nitrate) solution, both of these products can be combined with water.
Therefore, If water of the river was tested there would be orange color flame.
To learn more about fertilizers, refer to the link:
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Which of the following occurs when there is a chemical reaction? (Mark all that apply.)
a. the reactants don't change
b. bonds between atoms break
c. atoms rearrange
d. new bonds form
e. new substances form
f. there is no product
ASAP PLLEEASE HURYYYYYYYYYYRRRRRRRRRRRRYY (NO FILES FOR ME NEEDING TO DOWNLAOD PLEASE!)
1.Fill in the blank with the correct term to make the statement true.
During the (day/night)
at the beach, the land cools down
(faster/slower)
than the
(land/ocean).
Because of this, the air over the land is
(Warmer/cooler) than the air over the ocean. The
(More/less)
dense air rises over the ocean and the cooler,
(More/less)
dense air blows in from over the land creating a
(sea/land)
breeze.
2.Which statement is true about winds?
Winds always blow from low to high pressure.
Winds always blow from water to land.
Winds always blow from land to water.
3. Winds always blow from high to low pressure. How do landmasses impact the movement of air and water?
They stop all movement of both air and water.
They speed up the air and water and allow it to pass though.
They change the direction and slow them down.
They slow down the air but speed up the water.
Answer:
1.Fill in the blank with the correct term to make the statement true.
During the (night)
at the beach, the land cools down
(slower)
than the
(ocean).
Because of this, the air over the land is
(Warmer) than the air over the ocean. The
(More)
dense air rises over the ocean and the cooler,
(More)
dense air blows in from over the land creating a
(sea)
breeze.
2.Which statement is true about winds?
Winds always blow from low to high pressure.
true
Winds always blow from water to land.
false
Winds always blow from land to water.
false
3. Winds always blow from high to low pressure. How do landmasses impact the movement of air and water?
They stop all movement of both air and water.
They speed up the air and water and allow it to pass though.
They change the direction and slow them down.
think this is it
They slow down the air but speed up the water.
pt:2
answering the pictures
9- I don know sorry
15-B
16-A
Explanation:
just trying to help LET ME KNOW IF IT'S WORNG
some students observe four different lab investigations. The students record their observations in a table.
Investigation
Observations
1
A beaker of water is
heated on a hot plate. Bubbles form in
the water, and steam is given off.
2
Oil is added to a beaker of water. Oil forms a layer on top
of the water
3
Sand and iron filings are mixed in a beaker. A magnet is
then used to separate the iron filings from the sand.
4
A piece of chalk is placed in a beaker of vinegar Bubbles
form as a gas is given off.
Which investigation most likely involved a chemical reaction?
Answer:
Number 4 is an example of a chemical reaction
Explanation:
heThe chalk is reacting with the vingear which is creating a new substance. The new substance is the gas that the reaction gives off.
What type of worm has a circulatory system?
Nematodes
Segmented worms
Roundworms
Flatworms
Your answer will be Segmented worms. Segmented worms have a closed circulatory system in which blood is enclosed in blood vessels.
A scientist designs some experiments to record how various substances change. She then reviewed her results. Which of the investigations listed below is an example of how the substance changed chemically?
Sodium metal reacts violently and explodes with water.
After heating aluminum in a crucible, it began melting at 1200 degrees F
Hydrochloric acid is stored inside plastic containers.
Grinding Copper sulfate allowed it to be dissolved much quicker.
Answer:
Sodium reacting with water and exploding.
Explanation:
the others are just melting, dissolving and storing a chemical. also I know its a chemical reaction because its the only answer that involves more than one chemical and has an actual change.
hope this helps :)
why did Mendel become decide to become a teacher?
Answer:
he decided to become a teacher because he studied expertise and wanted to teach about early life
Explanation:
Answer:
While Charles Darwin's "The Origin of Species" was published in November 1859, a monastic priest and teacher named Gregor Mendel was in his third year experimenting with pea plants. His final results demonstrated principles of heredity that would eventually evolve into the new disciplines of genetics and molecular biology. His work not only helped solve the mysteries of diseases such as cystic fibrosis, Tay-Sachs disease, sickle cell disease, and hemophilia, it also and lay the foundation for the Human Genome Project.
Explanation:
Which type of mixture looks like it's composed of different substances?
Atomic
Homogenous
Heterogeneous
Ionic
Does an acidic solution contain hydroxide ions? Explain your answer.
Answer:
Yes but there are more hydrogen ions than hydroxide ions.
An acidic solution contains a large concentration of hydronium ions than hydroxide ions. Yes, an acidic solution contains hydroxide ions.
What are hydroxide ions?Hydroxide ions are produced from the ionization of water molecules carrying the positive charge on hydrogen.
A solution contains both the hydroxide OH⁻ and hydronium ions H⁺.
In order to make a solution acidic, a solution must contain more hydronium ions compared to hydroxide ions.
Yes, an acidic solution contains hydroxide ions.
Learn more about hydroxide ions.
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If you start with 5.5 liters of hydrogen peroxide (H2O2), how many molecules of oxygen gas (O2) will be produced?
Answer:
2.75 mol O2
Explanation:
2 H2O2 = 2 H2O + O2 is the formula
heres a picture of the work
The distance time graphs for two objects are shown below: look at the picture. Which statement is true? Both objects move at variable speeds. Both objects move at a constant speed. Object A is moving at constant speed but Object B is moving at variable speed. Object A is moving at variable speed but Object B is moving at constant speed.
Can you get this done before 10:40 pls
Answer:
The last statement is correct
Explanation:
Which of the following is NOT a way of making heat?
A. turning on an electric light
B. eating a sandwich
C. rubbing sticks together
D. melting an ice cube
Answer:
b. You should prolly know this tho lol
Explanation:
Which two elements are likely to form a compound that has ionic bonds?
sulfur and hydrogen
nitrogen and oxygen
sodium and chlorine
carbon and oxygen
Explanation:
for having a ionic bond we need great delta X that we see in electropositive atom (Na) and an electronegative atom(F)
1. What is the geologic time scale? Explain how the geologic time scale is a model.
2. How many millions of years was the Paleozoic?
3. During what era did the dinosaurs live?
4. During what period where the first early human relatives found?
Science question! Please read the article and give 2 new facts (not about continental drift please)! Please do this WITHOUT POSTING A LINK TO THE ANSWER (BECAUSE IF YOU DO IT WONT WORK AND YOU'LL BE MAKING ME WASTE MY POINTS TO ASK QUESTIONS!)
Ill give brainliest and a 5 star review for the best answer Do you think your town or neighborhood has an ecosystem? If you don’t think so, explain why not. If you do think so, what are the producers, consumers, and decomposers in the ecosystem? What roles do humans play in this ecosystem?
Answer: I do think that neighborhoods are an ecosystem
Explanation: a ecosystem contains living and non-living things, some examples are the people,plants,and pets are living organisms and the houses and the street lamps are non living. Therefore making a neighborhood a ecosystem
Giving brainliest and thanks to best answer
what will happen? (Newton's 1st Law Egg Drop)
Answer:
dogwater
Explanation:
lalidadida
What is the main function of messenger RNA?
a. it adds amino acids to a growing protein chain
b. it carries the information neccesary for protein synthesis
c. it carries the information neccesary for dna replication
d. it carries information that causes deletions and other mutations
Answer:
it carries the information neccesary for dna replication
Describe the concentration of hydronium ions and hydroxide ions when a base is added slowly to a white vinegar solution. The pH of white vinegar is 3.1.
Answer:https://brainly.com/question/22666401
Tis question is already answered my frnd
Pls help due in 5 minutes
When does the Southern Hemisphere experience the shortest day (and longest night) of the year? Why?
Answer:
The hemisphere tilted most toward our home star sees its longest day, while the hemisphere tilted away from the sun sees its longest night. During the Northern Hemisphere's summer solstice—which always falls around June 21—the Southern Hemisphere gets its winter solstice.
Explanation:
If Enough Thermal energy And change of state, write each sentence.
Write (solid), (liquid), or (gas) to complete each sentence
If enough Thermal energy is added to a liquid, it will change to a
___________
Please explain in simple terms.
Spam = remove
Googling it = Remove
Answer:
If enough thermal energy is added to a liquid lets say cold it will freeze turning it into a solid. they same for a solid if enough thermal energy is added it can turn to a liquid or a gas.
Explanation: Its science.
Answer:
gas
Explanation:
I don't know, just it is gas bc the atoms gain space and move freely and yeah
What happens to salt water and fresh water when you try to mix them.
Answer:
Salt water overtakes the fresh water
Explanation:
Answer:
It all becomes salt water, unless there is enough fresh water to dissolve the salt.
Explanation: Science/Chemistry
PLEASE HELP!!!!!!!! giving brainlist
Answer:
I can only give the answer for the first page.
Explanation:
1. Thermal energy always moves from hot objects to cold objects.
2. When two states of matter reach the same temperature, it is called thermal equilibrium.
How does resource extraction affect local and national economies?
Answer:
The direct channels by which extraction can affect the economy are of particular interest. The development of mines or oil and gas fields can result in significant shocks to a regional economy, generating jobs and drawing in capital from other regions and countries.
Explanation:
Define the following terms
Uniformitarianism
&
trace fossil
Answer:
Uniformitarianism- A theory that geologic process that occur today are similar to those that have occurred in the past
Trace Fossil- A fossil of a foot or trail or other travel of an animal rather than of the animal itself
What happens to salt water and fresh water when you try to mix them.
Answer:
the lighter fresh water rises up and over the salt water
Explanation:
this is because the salt water is denser
Answer:
When trying to mix fresh/salt water it leads to variable and dynamic chemical conditions, especially salinity because fresh water flowing into the estuary is less salty and less dense than water from the ocean, it often floats on top of the heavier seawater.
Explanation:
<3
A disease caused by the inflammation of mucus membranes inside the bronchial tubes. There are more than 3 million U.S. cases a year.
Inflammation can have causes that aren't due to underlying disease. Examples include injuries such as sprains and strains, overuse, or insect bites.