Explain why or why not the change is a chemical change or not.
A. The outside of a piece of cheese has turned green from mold.
B. An antacid tablet dissolves in water and forms carbon dioxide.
C. Ice melts and forms a puddle of water.
D. A piece of clay is broken in half.
Answers
Explanation:
A. Not a chemical reaction. Mold is a small organism.
B. Chemical reaction. When antacid tablet reacts with water CO2 is emitted.
C. Not a chemical reaction ice and water are 2 states of H2O. H2O solid and H2O liquid
D. Not a chemical reaction reactants and the result is the same clay.
Related Questions
You are on vacation with your family up in the mountains. Your friend is on vacation near the equator by the ocean. Explain which climate will experience the most precipitation based on what you know.
A. Both climates will have the same amount of precipitation.
B. The ocean climate will have less precipitation because it is close to sea level.
C. The climate around the equator will have more precipitation because it is very hot.
D. The mountain climate will have more precipitation because it increases with elevation.
Answers
Answer:
C
Explanation:
More precipitation occurs near the equator because it is a tropical area. When its hot, there will always be more precipitation.
Why are some incomplete fossils able to be pieced together? Full fossils of large animals can be found together. Hard tissue, like bone, never breaks or chips. Fossils require salt water to be preserved fully. Impressions from the skin can be preserved.
Answers
Answer:
Explanation:
The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.
Answer:
The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains are dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.
NaCl is classified as...
An element
An acid
A mixture
A compound
Answers
Answer:compound
Explanation:Na is an element, Cl is an element.Therefore, NaCl is a compound
What amount of moles does 60.5 L of carbon dioxide occupy at 2.15 atm and 25 degrees C?
4.3 moles
5.3 moles
9.3 moles
2.5 moles
Answers
Answer: 5.3 moles
Explanation:
Hi, to answer this question we have to apply the next formula:
n = PV/RT
Where:
n = number of moles
P= Pressure = 2.15 atm
V= volume = 60.5 L
R = 0.0821 atm(L)/mol(K)
T = temperature = 25 °+ 273.15 = 298.15 Kelvin
Replacing with the values given:
n = 2.15 (60.5) / 0.0821 (298.15) = 5.3 moles.
Feel free to ask for more if needed or if you did not understand something.
Which lifestyle is most likely to lead to infertility in a male ?
A man who works as a mechanic
A man who works as a computer programmer and sits at desk magority of the day
A semi professional athlete
A man who works for a company’s that applies pesticides to lawns
Answers
Answer:
The second on, A man who works as a computer programmer and sits at desk magority of the day.
Explanation:
Answer:
Explanation:
The only answer I can think as being possible is the last one. Pesticides are chemicals that go after unwanted animal life. They do not know that they should not attack human beings.
Infertility could very well be one of the side effects of a pesticide. There are others as well. Some pesticides go after the central nervous system (think mice and rats) and those are dangerous to use and to leave around.
The others all involve occupations that either require authentic abilities or mental astuteness. Neither should affect a man's ability to reproduce.
Match each letter with the correct label. Use the atom diagram below.
Electron - Nucleus - Proton - Neutron
Answers
C= protons
B= neutron
A= electron
Answer:
Explanation: First and foremost, we must carefully examine the provided diagram in order to properly name the sections of an atom diagram.
Step-by-step instructions are given along with the answers in sequential sequence.
Correct answer for (A) is Electron since they are present at the outermost shell of an atom.The correct answer for (B) is Neutron since it is the central element of an atom.The proton is the right answer for (C), as it is included in the nucleus grouping with the neutron.The nucleus is the correct option for (D) since it is the primary component of the atom and includes both protons and neutrons.Learn more about the Atom here:
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1. Diet and stress are mostly examples of which type of factors?
A. Genetic
B. Environmental
C Nutritional
D. Inherited
2.Eye color is mostly caused by
A. Genetics
B. Environmental
C. Nutritional
D. Chance
Answers
1) C
2) A
Diet and stress are mostly examples of Nutritional factor, Eye color is mostly caused by Genetics.
what are the different components of human eye ?
The structure of human eye is an important sensory organs which is responsible for vision, differentiation of color that is 10 – 12 million colors and maintain the biological clock of the human body.
The internal components of an eye are Lens which are transparent, biconvex attached to the ciliary body with the cornea it refracts light.
Retina is the innermost layer of the eye, light sensitive and acts as a film of a camera, ganglion, bipolar and photoreceptor cells are present in retina.
It involve in the conversion of the image into electrical nerve impulses used for the visual perception.
Optic nerve located at the posterior portion of the eyes which carry all the nerve impulses from the retina to the brain for perception.
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Descride Three ways that people can conserve natural resources?
Answers
Answer:
1. Reuse things like cups, towels, cloths, etc.
2. Plant a tree. (Trees and other organic energy sources are traditional sources of renewable energy.)
3. When using natural resources, only use the necessary amount so you're not wasting any.
Hope this helps!!
2. do something for the environment! plant some flowers or pick up trash when you see it.
3.
he diagram shows changes of state between solid, liquid, and gas. The atoms of a substance lose energy during a change of state. Before the change, the atoms are close together but are able to slide past one another.
A diagram has a triangle at center with gas on top, liquid on bottom right, solid on bottom left. An arrow from gas to liquid is labeled O, and an arrow from liquid to gas is labeled N. An arrow from solid to liquid is labeled P, and an arrow from liquid to solid is labeled Q. An arrow from solid to gas is labeled L, and an arrow from gas to solid is labeled M.
Which arrow represents the change of state described above?
M
N
P
Q
Answers
Answer:
The correct answer is P
Explanation:
The surface of the land is shaped by the process of erosion and deposition caused by:
lava
water
wind
tsunamis
glaciers
waves
gravity
earthquakes
its a select that apply!
Answers
Answer:
Explanation:
hi
Explanation: Deposition occurs when the agents (wind or water) of erosion lay down sediment. Deposition changes the shape of the land. Water’s movement (both on land and underground) cause weathering and erosion, which change the land’a surface features and creates underground formations.
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 ______________.
Answers
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:
Derrick decided to research what factors might affect the properties of the solubility of a solution. After completing his research, Derrick knew that several factors affected the properties of solubility. Explain the factors that affect the properties of the solubility of a solution.
Answers
Help! I need to finish work. Brainlist will be given to the most helpful!
Answers
Answer:
1. matches with elements.
2. matches with compounds.
3. matches with atoms
4. matches with weight
5. matches with gas
6. matches with carbon dioxide
7. matches with Mendeleev (there's an element named after him)
8. matches with IUPAC
Hope that helped :)
HEEEELP!!! THIS IS DUE TODAY
What is one of the most important forms of energy? Give two examples of how this type of energy is used in our lives.
Answers
Refrigeration used electrical energy.
Answer:
"There is no God but Allah, and Muhammad is his messenger." This is the basic statement of the Islamic faith: anyone who cannot recite this wholeheartedly is not a Muslim. When a Muslim recites this they proclaim: That Allah is the only God, and that Muhammad is his prophet.
I hope u find the right path
Explanation:
What is not an Example of the Coriolis effect?
Having trouble, not good at science!
Answers
Answer:
the turn of the world, shooting a bullet in the air, airplane and
rockets, bouncing ball, ocean current, driving on curved road
Explanation:
If it rained, what would be the deepest layer the water would go through?
Answers
Answer:
soil
Explanation:
Answer:
A. Soil
Explanation:
Let's say you added too much magnesium in the amount of 0.1594 g. How much 8.00 M HCl (in mL) would be required to decompose the excess Mg present?
Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g)
Answers
Answer:
1.65×10^-3 L or 1.65 mL
Explanation:
Number of moles of magnesium in the excess reagent= mass of excess reagent/ molar mass of magnesium
Mass of excess magnesium= 0.1594 g
Molar mass of magnesium= 24 gmol-1
Number of moles of magnesium= 0.1594/24 = 6.6×10^-3 moles
From the reaction equation;
1 mole of magnesium reacted with 2 moles of HCl
6.6×10^-3 moles of magnesium will react with 6.6×10^-3 moles × 2= 13.2×10^-3 moles of HCl
But we know that;
Number of moles of HCl= concentration of HCl × volume of HCl
Volume of HCl= number of moles of HCl/ concentration of HCl
Since concentration of HCl= 8.00M
Volume of HCl= 13.2×10^-3/8.00= 1.65×10^-3 L or 1.65 mL
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
what are the function of a objective lens and the ocular lenses
Answers
Answer:
Explanation:
The objective lens gather light from the specimen, magnifies the image of the specimen and projects the magnified image into the body tube. The ocular lens magnifies the image. It contains a measuring scale called a ocular micrometer.
During digestion, what happens in the stomach?
A. All food molecules are broken down into smaller molecules by chemical reactions.
B. Some types of food molecules are broken down into smaller molecules by chemical reactions.
C. Water in the food passes into the blood and travels to other organs where it is used.
D. Food passes into the blood and travels to other organs where it is used in various reactions.
Answers
Answer:
A
Explanation:
Food is digested in the stomach for several hours. During this time, a stomach enzyme called pepsin breaks down most of the protein in the food. The pancreas and gland cells of the small intestine secrete digestive enzymes that chemically break down complex food molecules into simpler ones.
Answer:
A
Explanation:
solve the following (3x10^9)(4x10^5)/(6x10^-3)
Answers
Answer"
\(2(10^{17})\)
Explanation:
You can simply just plug this into your calc and you should get the answer. Alternatively, when you multiply exponents, you add them, so you know you answer would be something times \(10^{17}\). After finding that out, you multiply 3 by 4 (which is 12), and divide by 6, which gives you 2. Multiply the 2 together and you get your answer.
200 milliliters is equal to:
Answers
Answer:
0.2 Litres
Explanation:
There are 1000 milliliters in a liter so 200 millimeters is equal to (200/1000) 0.2 litres.
Not quite sure what type of answer you were looking for but I hope this hoped anyway!
Answer:
O. 2 litres /200 cm³
Explanation:
Litre:200 divided by 1000 coz one litre is equal to 1000 millilitres and Inorder to convert between smaller to bigger units you divide. Cubic centimetre:because one cubic centimeter equals one millilitres therefore 200ml will be equal to 200cm³
PLEASE ANSWER QUICKLY!!!!! Which of the following is NOT a function of your integumentary system?
A) Protecting against infection
B) Synthesizing vitamin D
C) Maintaining Fluid Balance
D) Stabilizing blood pressure
Answers
Answer: Must be a trick question.
Explanation: All of these are a function of the integumentary system.
Hope this helps <3
Which material undergoes radioactive decay?
all elements that have a half-life
all elements that contain atoms with protons
all elements that have turned into a new element
all elements that have a consistent number of particles
pls hurry I will give brainlyest to the first person and will be thiere friend
Answers
Answer:
all for nothn ginin all
Explanation:
What is the reaction that occurs when your breath is bubbled through a solution of Calcium hydroxide?
Answers
Answer:
The answer is neutrailzation reaction hope it helps
When the solar system was very young, the sun was just being formed and planets had not yet been made. The solar system was mostly gas and dust. Which statement best explains how planets formed in the early solar system?
A.Planets formed from magnetism in space that interacted with light from the stars.
B.Planets formed from large asteroids that had broken apart.
C.Planets formed from molten metal in volcanic eruptions.
D.Planets formed from small amounts of debris that were attracted together because of gravity.
Answers
Answer:
Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. ... When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material. At the center, gravity pulled more and more material in.
Explanation:
When the solar system was very young, the sun was just being formed and planets had not yet been made. The solar system was mostly gas and dust.
in conclution its d
Planets formed from small amounts of debris that were attracted together because of gravity.
D. Planets formed from small amounts of debris that were attracted together because of gravity.
A dense cloud of interstellar gas and dust formed our solar system roughly a billion years ago. A solar nebula—a whirling, swirling disk of material—was produced when this dust cloud collapsed. Gravity drew more and more material into the center. The sun was still forming and planets had not yet been created when the solar system was very young. The solar system consisted primarily of gas and dust.
D. Planets formed from small amounts of debris that were attracted together because of gravity.
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What is an ellipse please help)
Answers
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
The cells that form the lining of the stomach most likely form ______ since they produce secretions and protect the stomach.
Answers
Explanation:
Pls help due in 5 minutes
When does the Southern Hemisphere experience the shortest day (and longest night) of the year? Why?
Answers
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:
Procedure and Data (20 points)
1. Remove the label from a 2- or 3-liter plastic soft drink bottle and wash the bottle. Be sure to rinse it very well so that no soap residue remains. Let the bottle dry.
2. Use a marker to draw a line around the bottle, about one-third of the way up from the bottom.
3. Use scissors to cut along the line you drew on the bottle. To start the cut, poke a hole in the bottle at some point on the line.
4. Place about 2 inches of gravel or pebbles in the bottom of the bottle. This layer will be a place for excess water to collect. It will keep the soil from getting too wet. (Optional: If you want your terrarium to last longer, sprinkle some activated charcoal and moss on top of the gravel or pebbles.)
5. Fill the remaining space in the bottom of the bottle with moist potting soil or dirt. Gently press down on the soil with a gloved hand until the surface of the soil is about 1 inch below the rim.
6. Add plants to the terrarium.
a. If you are using seeds, use your pinkie finger to make 8 to 10 small depressions in the soil. They should be about 0.5 inches deep. Place 1 or 2 seeds in each hole and cover them with soil.
b. If you are using live plants, remove 2 or 3 small plants from their containers. Be sure to keep the root ball intact. Plant them in the soil.
7. Pour tap water onto the soil so that it is moist but not completely soaked. Just a little bit of water should pass through to the pebbles. You should use less than 1 cup of water.
8. Put the bottle back together by sliding the top part onto the bottom part. Keep the top on the outside. You may need to squeeze the rim of the bottom section so the top section will fit around it.
9. Place the cap on the terrarium if it is not on already. Your setup should look like this if you started with young plants:
10. Describe your terrarium, including what you put in it and where those materials came from. Attach a photo or draw a diagram of your terrarium. Add labels to identify the important parts. (8 points)
11. Place your terrarium next to a window where it will receive plenty of natural sunlight. Do not place the terrarium outdoors. Observe the terrarium. If you planted seeds, wait until they sprout to begin recording what you see. If you start with live plants, you can begin recording your observations the next day. Make observations for four days in a row. Look at the terrarium first thing in the morning and at the same time each afternoon. Take note of where water can be observed. Look at how much water is in the pebbles and on the sides at the top of the terrarium. Record your data in the table below. (8 points)
Data Table for Observations in Bright Light
Day
Morning: General observations
Morning: Observations of water
Afternoon: General observations
Afternoon: Observations of water
1
2
3
4
12. Move your terrarium away from the window so that it gets less sunlight. It should still receive some natural light. Continue your observations for two more days. Record your data in the table below. (4 points)
Data Table for Observations in Dim Light
Day
Morning: General observations
Morning: Observations of water
Afternoon: General observations
Afternoon: Observations of water
5
6
13. If you want to continue to watch your plants grow, place your terrarium where you think they will grow best. If you are done with your terrarium, collect the materials inside and dispose of them as instructed by your teacher. Rinse and recycle the plastic bottle.
Analysis and Conclusions (30 points)
1. Explain how your terrarium modeled each of the following processes in the water cycle. (10 points)
Condensation:
Evaporation:
Precipitation:
Infiltration:
Transpiration:
2. Draw a diagram to show how your terrarium modeled the water cycle. Include labels for the five processes in question 1. Add arrows to show how water moves through the water cycle. (10 points)
3. How did the force of gravity affect the movement of water in your terrarium? (2 points)
4. Compare your observations of the terrarium when it was in bright light and dim light. What can you conclude about how sunlight affected the water cycle in your terrarium? (4 points)
5. What is one advantage of using a terrarium to model Earth's water cycle? Explain. (2 points)
6. What is one way in which you could improve your terrarium in order to show more parts of the water cycle? (2 points)
Answers
Is this asking us to do a project for you?
Analysis and Conclusions:
1. Explain how your terrarium modeled each of the following processes in the water cycle. (10 points)
Condensation: In the terrarium, condensation is modeled when water vapor from the soil and plants rises, cools down, and turns into droplets on the inner surface of the bottle.
Evaporation: Evaporation is modeled when water from the soil and plants evaporates and rises as water vapor in the enclosed space of the terrarium.
Precipitation: Precipitation is not directly modeled in the terrarium, as there is no mechanism for rain to fall back into the soil. However, the condensation on the inner surface of the bottle can be seen as a form of "internal precipitation."
Infiltration: Infiltration is not directly modeled in the terrarium, as there is no underground or soil surface for water to infiltrate into.
Transpiration: Transpiration is modeled when water is absorbed by the plant roots, travels through the plant, and then evaporates from the plant's leaves, contributing to the water vapor in the terrarium.
2. Draw a diagram to show how your terrarium modeled the water cycle. Include labels for the five processes in question 1. Add arrows to show how water moves through the water cycle.
(Unfortunately, I cannot see your diagram, so I'm unable to provide specific feedback on it.)
3. How did the force of gravity affect the movement of water in your terrarium? (2 points)
The force of gravity caused water to move downward from the soil to the gravel or pebbles at the bottom of the terrarium. It also caused excess water to collect at the bottom of the terrarium.
4. Compare your observations of the terrarium when it was in bright light and dim light. What can you conclude about how sunlight affected the water cycle in your terrarium? (4 points)
Observations in Bright Light:
- More evaporation and transpiration were observed due to increased sunlight.
- Condensation occurred more prominently on the inner surface of the bottle.
- Water levels in the pebbles were lower due to increased evaporation.
Observations in Dim Light:
- Reduced evaporation and transpiration were observed due to less sunlight.
- Condensation on the inner surface of the bottle might have been less noticeable or slower.
- Water levels in the pebbles remained relatively stable.
Conclusion:
Sunlight plays a significant role in the water cycle within the terrarium. It drives evaporation from the soil and plants, leading to more condensation and a higher water vapor concentration inside the terrarium. In dim light conditions, these processes are slowed down.
5. What is one advantage of using a terrarium to model Earth's water cycle? Explain. (2 points)
One advantage of using a terrarium to model Earth's water cycle is that it provides a contained and observable environment. It allows students to witness and understand various stages of the water cycle, including evaporation, condensation, and transpiration, in a small-scale setting. It can be a visual and hands-on approach to learning about these natural processes.
6. What is one way in which you could improve your terrarium to show more parts of the water cycle? (2 points)
To show more parts of the water cycle, you could create a mechanism for precipitation within the terrarium. For example, you could introduce a small spray bottle and periodically mist the plants inside the terrarium to simulate rain or external precipitation. This would add an additional aspect to the water cycle modeling and demonstrate the effect of precipitation on the enclosed environment.