Answer:2) crushing the sugar cube and dissolving it in water is the only physical change here.
Explanation: All the other shows chemical change.
NEED HELP! SCIENCE HW IS DUE IN 1 HOUR!!!!!!!!
What type of changes are these and why?
C∪tting hair is a (physical/chemical) change.
Cooking is a (physical/chemical) change.
Ice cream melting in the sun is a (physical/chemical) change.
Options for Reasons
1. Change of state
2. Changes what object is
3. Causes a reaction (signifies chemicals change)
Answer:
hair is a physical change.
Cooking is a physical and chemical change.
Ice cream melting in the sun is a physical change.
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An index fossil represents a species that lived during
A.
a long interval of Earth's history.
B.
Earth's entire history.
C.
a short interval of Earth's history.
D.
several intervals of Earth's history.
which one is it?
Answer:
C
Explanation:
an index fossil is a fossil from a very short-lived, geographically widespread species known to exist during a specific interval of geological time.
I have asked this already!!!!!
Answer:
01) Cu tting hair is a physical change. reason-1
02) Cooking can be either one, but I would choose chemical reason-3
03) Ice cream melting is a physical change reason-2
Explanation:
Which travels faster? An echo that forms in water or one that forms in the air?
Answer:
air
Explanation:
air has much less resistance than water, and echos are just propagating mediums
NEED THIS ANSWER SOONER THAN ASAP!!! HELP PLZ!! Explain how the concepts of energy transformation and conservation of energy allow you to track how energy moves through a system.
The law of conservation of energy states that energy can neither be created nor be destroyed, but it can be transformed from one form to another.
So I considered an example of it as follows: water is stored at height with potential energy, the water flows, and its potential energy is converted into kinetic energy. It flows to rotate a turbine with mechanical energy. Then the kinetic energy is converted into electrical energy. In our house, the electrical energy is converted into luminous energy, heat energy, and so on.
But what happens after that?
Explanation:
In summary, the concepts of energy transformation and conservation provide a powerful framework to understand how energy moves through a system, how it changes forms, and how to ensure that the total energy remains constant throughout the process.
Energy transformation refers to the process of converting energy from one form to another. In any system, energy can exist in various forms, such as kinetic energy (energy of motion), potential energy (energy due to position or configuration), thermal energy (heat), chemical energy (stored in chemical bonds), electrical energy, etc. As energy moves through a system, it can undergo transformations, changing from one form to another.
Learn more about energy conversion here.
https://brainly.com/question/29102331
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OK I NEED HELP ON THESE BUT CAN U PLEASE LIKE EXPLAIN Y
Answer:
For the 1st question, it is the pickup truck.
Explanation:
Even though they are the same speed, the pickup truck is curving. So, I think it changes velocity.
Answer:
For the 2nd question, it is B.
Explanation:
Accelaration is either slowing down, speeding up, or changing direction. However, B is in a straight line. So, it must be B.
Nirates and phosphates are important chemicals to living things. Explain why these chemicals can also be pollutants.
Answer:
Nitrogen and phosphorus are essential elements for all living organisms. They are used in DNA and chemical processes in the body. Most nitrogen is found in the air and most phosphorus is bound up in rocks and sediments, making them unavailable to organisms. And they are pollutants cuz nitrogen and phosphorus support the growth of algae and aquatic plants, which provide food and habitat for fish, shellfish, and smaller organisms that live in water. But when too much nitrogen and phosphorus enter the environment - usually from a wide range of human activities - the air and water can become polluted
Explanation:
if my answer help, I hope you get better <3
Explanation:
When nitrate and phosphate ions concentrations in shallow waterbodies are in excess, there is overgrowth of water plants leading to the formation of algal bloom. This causes a high consumption of dissolved oxygen in the water. ... The dead plants and animals decay creating deterioration of water quality.
What is a feature shared by all animal cells?
Select one:
Animal cells can make sugars using the Sun's energy.
Animal cells have tough cell walls.
Animals cells are eukaryotic.
Animal cells are prokaryotic
_______________________________________________________
The diagram below BEST represents which part of the cell theory?
Select one:
cells are the basic unit of all living things
all living things are made up of cells
Cells come from other living cells
living cells are neither created or destroyed
---------------------------------------------------------------------------------------------------
Which of the following statements about cells is true?
Select one:
Cells are the basic unit of all living things.
Cells do not have a function in living creatures.
Cells are all the same on the inside.
Cells are all about the same size and shape.
Answer:
1. Animal cells are eukaryotic
2. All live things are made up of cells (I think)
3. Cells are the basic unit of all living things
Explanation:
Number 2 is probably wrong because I can't see the diagram but, all living things ARE actually made up of cells
Design Report
Design a Thermos
It’s time to complete your Design Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U2_ Lab_DesignAThermos_Alice_Jones.doc).
Problem and Constraints
1. What was the problem you tried to solve in your design challenge?
Type your answer here:
2. What were the constraints of the design challenge?
Type your answer here:
Plan
1. Draw a sketch of your design. Include labels and notes about how your design fits the constraints.
Type your answer here:
Test
1. Describe the procedure that you followed to test your design.
Type your answer here:
2. Describe the results of your design test.
Type your answer here:
Evaluation
1. Evaluate your design by describing how well the device performed and whether it met the constraints and solved the problem.
Type your answer here:
2. Revise your design by creating a sketch of an improved model. Describe how the new design is an improvement over the original.
Type your answer here:
Answer:
sm
Explanation:
s a job and your dad and I will let her get to get to get to the right sir thank I just want and if I will let her when I can do it out and your dad are going I think it's just the right hel
Why have ice ages come and gone?
Answer:
"When less sunlight reaches the northern latitudes, temperatures drop and more water freezes into ice, starting an ice age. When more sunlight reaches the northern latitudes, temperatures rise, ice sheets melt, and the ice age ends."
Explanation:
Answer:
As temperatures decrease, less sunlight reaches the water. This causes the ice to freeze, when this happens in mass it causes an ice age. Later, temperatures rise and the ice melts.
Explanation:
Temperatures plummet as less sunlight reaches northern latitudes, and more water freezes into ice, triggering an ice age. Temperatures rise, ice sheets melt, and the ice age ends as more sunshine reaches northern latitudes.
The graph below shows the mechanical energy of a car on a roller coaster at four different locations.
Which of the following is a supported by evidence from the graph?
Potential energy increases but kinetic energy stays the same during a roller coaster ride.
Kinetic energy and potential energy change, but energy is neither created nor destroyed during a roller coaster ride.
Potential energy is destroyed during a roller coaster ride.
Kinetic energy is created during a roller coaster ride.
A)Potential energy increases but kinetic energy stays the same during a roller coaster ride.
Explanation:
Potential energy is stored energy that depends upon the relative position of various parts of a system.
Kinetic energy is a form of energy that an object or a particle has by reason of its motion
it goes back and fourth
Convert all of the following lengths to millimeters.
A. 12 cm = ___ mm
B. 5 inches = ___ mm
C. 1 yard = ___ mm
D. 1 meter = ___ mm
E. 10 feet = ___ mm
The temperature of a plastic cup is 70ºF. It is filled with water that is 40ºF. Which of the following describes how thermal energy is transferred?
a. Thermal energy is transferred from the cup to the water until they are both at 45ºF.
b. Thermal energy is transferred from the cup to the water until the cup is at 60ºF and the water is at 50ºF.
c. Thermal energy is transferred from the water to the cup until they are both at 45ºF.
d. No thermal energy is transferred between the cup and the water, so the cup will stay at 70ºF and the water will stay at 40ºF.
Shani poses as the Statue of Liberty for an art class. She holds a torch above her head with her right hand and a book against her side with her left hand. She holds the pose for ten minutes. At the end of the session, she mentions to her friend that it was a lot of work to pose and that her arms are really tired.
Which describes the work Shani did while she posed?(assume the starting work position is when her hand is already raised )
She did more work with her right hand than with her left because the right was held up higher.
She did no work while she posed because she did not move the torch or the book.
She did work while she posed because she was tired at the end of the session.
She did no work while she posed because she did not exert a force on anythi
Answer:
She did no work while she posed because she did not move the torch or the book.
Explanation:
Which of the following are true when milk changes into curd?
(i) Its state is changed from liquid to semi-solid.
(ii) It changes colour.
(iii) It changes taste.
(iv) The change cannot be reversed.
Choose the correct option.
a) (i) and (ii)
b) (ii) and (iii)
c) (i), (iii) and (iv)
d) (i) to (iv)
Answer: If you still need it, i can answer.
the answer is C.
Milk doesn't really change color.
hope this helps. have a nice day.
In Kevin’s favorite comic book, the superhero has special powers. In one adventure, the superhero must stop an evil villain who threatens to destroy the city with a powerful energy blast.
As he confronts the villain, he makes the following claims:
1: “I can create an energy force field to save the city.”
2: “I can destroy the energy before it destroys the city.”
3: “I can convert all the energy before it can do any harm to the city.”
4: “I can absorb all the energy and make it go away.”
If the superhero must obey the law of conservation of energy, which of the above can he actually do?
a. 1
b. 2
c. 3
d. 4
Answer:
3
Explanation:
The law of conservation of energy states that energy cannot just be created, so answer one is out. Energy also cannot be simply destroyed, so answer to is out as well. From here it gets tricky, since both answers make some sense under these rules. However, absorbed is bassically the same as destroying it leaving only answer three. Answer three does obey these laws, as energy can be converted.
in a neap tide, the moon's effect on blank
Answer:
Neap tides occur during the first and third quarter moon, when the moon appears "half full"
It has been theorized that all of the modern continents on Earth were once part of a single continent. What scientific evidence is used to support this theory?
1) Fossils of similar lifeforms have been found on different continents.
2) The coastlines of some modern continents appear to have once fit together.
3) Some of the continents that exist today have similar types of rocks.
Which on is it?
Answer:
2) The coastlines of some modern continents appear to have once fit together.
Explanation:
Because it is true if you look at a map you can clearly see that some continents fit together perfectly. It is quite amazing.
Answer:
All 3 are true.
Explanation:
Study Island
Which of the following images show high air pressure?
A a cloudy sky
B a clear sky
C a clear sky
D a cloudy sky
A) A and B
B) A and D
C) B and C
D) C and D
Answer:C a clear sky
Explanation: there are no clouds to let out more air pressure. So there could be more bubbles of air pressure in the sky or “patches”
A student made the table below to compare high air pressure and low air pressure. Which correction is required to make the table correct?
a table comparing air pressure. High pressure has more air above pressing down and results in stormy weather. Low pressure has less air above pressing down and results in cloudy weather.
High pressure results in clear skies.
High pressure results in less air below pressing up.
Low pressure results in more air above pressing down.
Low pressure results in sunny weather.
Answer:
high pressure results in clear skies
Explanation:
can someone answer these chemistry questionss
you are able to search it up and this looks more like math then chemistry
Could someone pls help me with this too?
Answer: B im pretty sure
How do telescopes help astronomers learn more about the universe?
a. Telescopes gather more light than the n a k e d eye can see.
b. Telescopes gather less light than the n a k e d eye can see.
c. Telescopes change the color of the light that we see.
d. Telescopes apply a filter to the light that we see.
Answer:
A. Telescopes gather more light than the n a k e d eye can see
Explanation:
Telescopes allow us to see things from far away by gathering more light
A student performs an exothermic reaction in a beaker and measures the temperature. If the thermometer initially reads 35 degrees Celsius, what is a possible reading of the thermometer after the reaction? A. 35 degrees Celsius B. 0 degrees Celsius C. 45 degrees Celsius D. 25 degrees Celsius
Answer:
C
Explanation:
Exothermic means that heat is released from the reaction
I have no idea what this is about, I keep reading it over and other again, but I still don't understand! Help?
Answer:
A
Explanation:
So, here's a slightly simpler example:
If i had a jar, and i added sand, then rocks on top of the sand, and finally dirt on top of everything, what would the layers of the jar look like? (Assuming that i hadn't shaken the jar)
Well, the answer would be: The bottom of the jar would be a sand, the middle would be rocks, and on top would be dirt.
This question is pretty much the same question, just with fancier words and 4 things instead of 3
If the stars come first, then you find them at the very bottom of the jar. if the squares come second, then they are above the stars, but below the triangles, which come third. The circles come last, so you find them last. Thus the order is: stars, squares, triangles, and circles, from bottom to top, so it's A
Note: the jar represents the earth, and it too, may be shaken up in some places. This means that sometimes, if two organisms lived very close together in time (like the star and the square), and some event happened, you may occasionally see the square below the star. However, this question says that they weren't disturbed.
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Select each correct answer. More than one answer may be correct.
Which of the following contributes to the phases of the Moon as seen from Earth?
the Sun lighting different parts of the Moon at different times
the Moon orbiting the Earth
varying amounts of the Moon's lit surface being visible from Earth
Answer:
The Sun lighting different parts of the Moon at different times
Explanation:
I think
Answer:
all of them are right ok guys
Explanation:
trust me I did this on study island
Compare and contrast the Andes Mountains and the Rocky Mountains. How are they formed? What consumers and producers are in each? First reasonable answer gets brainly
Why are astronomers sending telescopes, like the Hubble Space Telescope, into space?
a. It puts the telescope closer to the sun.
b. It allows for the telescope to stay colder.
c. It's cheaper and more efficient to store the telescopes in space.
d. It lessens the effect of the atmosphere.
Answer:
C.)atmosphere distorts and blocks the light.
Explanation:
What type of cells make up all parts of the human body?
Select one:
Prokaryotic cells
Eukaryotic cells
Archaea cells
Circular cells
Answer:
Eukaryotic Cells
Explanation:
Eukaryotic cells have organelles, membrane-bound structures that perform different functions in the cell, and prokaryotic cells do not. Some typical eukaryotic organelles include the nucleus, mitochondria, ribosomes, Golgi apparatus, and chloroplasts.