What can the student conclude about the experiments? (Attachment)
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A. Experiments 1 and 2 show chemical changes because bubbles were produced.
B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.
C. Experiment 1 shows a chemical change because bubbles were produced, and experiment 2 shows a physical change because a liquid turned into a solid.
D. Experiments 1 and 2 show physical changes because no new substances were produced.
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Answer: B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.
Explanation: a physical change is reversible
chemical is 2 or more substances combined to make a reaction such as bubbling, change of color or temperature
Related Questions
answer this please sooo
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2) solid
3) Chemical
8) boiling
A theory usually has observation and reasoning in its favor, although it may not be experimentally verified.
True or False
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What happens to the wave on the string when you decrease the amplitude?
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Answer:
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. ... The amplitude of a wave is related to the amount of energy it carries. A high amplitude wave carries a large amount of energy; a low amplitude wave carries a small amount of energy.
Explanation:
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Answer:
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases
Explanation:
Jim ran 200 meters in 30.4 seconds. Mac ran 100 meters in 30.4 seconds. Who ran faster?
Jim, because his distance divided by time is less
Jim, because he ran a greater distance in the same time
Mac, because he ran the same distance in fewer seconds
Mac, because his rate of change of distance over time was constant
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Jim, because he ran a greater distance in the same time :)
By the way, this is a maths question
Select all that apply. Wire is typically made out of metal because metal
Question 10 options:
Is malleable
Is ductile
Is brtittle
Conducts electricity
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Metal is a really good conductor and is used in different electronics. It is also ductile, meaning it can be pulled into a thin wire.
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Wire is typically made out of metal because metal is ductile and conducts electricity.
Ductility is the property of metal which makes it easy to be stretched into wire when drawn without breaking. This is a great feature for wires.
Conductor of electricity : The ability for a material to allow electricity to pass through it with ease shows it is a good conductor of electricity.This is also a great feature for wires.
The transition metal, copper is usually preferred for the manufacture of electrical wires This is because apart from being thermal resistant and cheap, it is very ductile and a good conductor of electricity.
See more on the property of metals to make wires :https://brainly.com/question/13854828
How does the amount of water in a glass affect the pitch of the sound it produces?
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Answer:
the more water the higher the pitch the less water the lower it is
Answer:
The glass with the most water has the lowest pitch. The glass with the least amount of water has the highest pitch.
Explanation:Tapping the glasses causes the air to vibrate. When the air column is shorter, the air vibrates faster and the pitch is higher.
Is this right?
...........
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If a average person and a trained athlete where to exercise which pule rate would be slow and which pulse rate would be fast?
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the athlete would have a slower pulse rate because their body is acclimated to the exercise and does not need to work as hard to maintain their body
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Asapp
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Answer:
Agree
Hope this helps
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What happens at the borders of major tectonic plates?
Radioactivity is very high and large amounts of uranium are found.
Earthquake and volcanic activity is evident.
The edges of plates break apart due to the crushing that occurs.
The borders are calm and free of plate movement activity.
Answers
Answer: continental crust is created and oceanic crust is destroyed.
Explanation:
Answer:
Radioactivity.
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Which description is not a property of an acid?
A. pH lower than 7
B. Turns litmus paper blue
C. Sour taste
D. Corrosive
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Answer:
B turns litmus paper blue
Explanation:
please help in this,it will be such a help,ASAP,and ill put u brianlist first one!!!!!,both questions
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Answer:1:T
Explanation:
Hope this helped! this is because it is true all the others don’t make sense.
How does the temperature of water affect its ability to hold oxygen?
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Answer:The solubility of oxygen and other gases will decrease as temperature increases 9. This means that colder lakes and streams can hold more dissolved oxygen than warmer waters. If water is too warm, it will not hold enough oxygen for aquatic organisms to survive.
Explanation:
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......
Answer:
agree
Explanation:
you cannot undo the reaction when you bake the cake
Sugar, C6H12O6, is made of carbon, hydrogen, and oxygen atoms. Sugar is — (I WILL MAKE U BRAINLIEST
A. a compound because it is made of two or more atoms chemically combined and its parts cannot be separated by physical means
B. a mixture because it is made of different kinds of atoms but they are not chemically combined
C. a solution because it dissolves when mixed with water
D.an element because it is a pure substance whose parts cannot be separated
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Sugar is a compound because it is made of two or more atoms chemically combined and its parts cannot be separated by physical means.
Answer:
A
Explanation:
D. is not the answer as there are many elements that go into Sugar
C. Is not the answer because it is not a solution
B. Is not the answer because they are not physically combined but chemically
Therfore A is the answer
Steps of photosynthesis:
___ ATP molecules form.
___ Sugar molecules form.
___ Chlorophyll absorbs light energy.
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Answer:
Chlorophyll absorbs light energy, ATP molecules form, sugar molecules form. I'm pretty sure this is correct, but if it is not I'm sorry...
Explanation:
2. ATP molecules form
3. Sugar molecules form
Help I need to know and please answer three of the following questions
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Answer:
we'll, metal cups are usually used for coffee so people who bring their coffee to work from home can keep it warm. metal cups however do not keep things cold, it may feel cold on the outside, but that's an illusion. plastic doesn't do much, its just a cold insulator. it is good at keeping things cold because it is a poor heat conductor. foil can keep things warm, but it can also keep things cold. do what you will with the info lol.
Answer:
1.H & E
Explanation:
metal cups keep things hot and cup H is made to keep things both cold and hot but the other cups will melt if you put hot stuff in them and number three is an answer it your self because it says to enter your answer so........
²³√∛·×÷±≈≠≤≥≡≅⇒,⇔∈∉∧∨∞αβΔπФω↑↓∵∴↔→←⇵⇅⇄⇆∫∑⊂⊃⊆⊇⊄⊅∀°∠∡⊥∪∩∅¬⊕║∦∝∞㏒㏑
Please answer one or both of the questions below
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Answer:
a=2 b=1 c=3 im litterally takeing the quiz right now
Explanation:
Answer:
a=2 b=1 c=3
Explanation:
use your brain :)
15 points and brainiest (if there's 2 answers)
Is the coloring of the peppered moths an example of competition, differential reproductive success, or inherited variation?
Please explain why
thank you
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Explanation:
Because the coloring of the moths were a genetic mutation that helped strengthen the endurance and versatility of the moths by blending in with better environments
How do you think the presence of farms will affect the oxygen concentration in the ponds? im in sixth grade so i can't really comprehend to much of words lik algae or my teacher will ask me how i got educated on the topic
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Answer:
The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.
Explanation:
Answer:
The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.
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Answer:
OF COURSE I AGREE.A CHEMICAL REACTION REARRANGES THE CONSTITUENT ATOMS OF THE REACTANTS TO CREATE DIFFERENT SUBSTANCES AS PRODUCTSI will brainly
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Which of Newton's 3 Laws explains a rocket lifting off? *
Law of inertia
Law of Acceleration
Law of Action-Reaction
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Answer:
Newton's Third Law of Motion
Explanation:
A rocket expels hot gases at a very high pressure very quickly, and these gases have lots of energy, and according to Newton's third law, every action has an equal and opposite reaction. So, expel lots of gas at a high rate, and the energy of the gases being pushed out propels the rocket upward. Hope that helps!
Use the images below to complete the information on the table and answer questions 1-5.
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Answer:
Proton: Positive
Electron: Negative
Neutron: No charge
Electron negative
Neutron neutral
Write a statement that best compares the rotation of a gaseous planet (Jupiter, Saturn, Uranus, Neptune) to the rotation of a rocky planet (Mercury, Venus, Earth, Mars)?
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In two or more complete sentences explain how to balance the chemical equation,
Ca + N2 ⟶ Ca3 + N2 and include all steps.
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Answer:
to balance this equation, your going to put a 2 in front of the "Ca" then that makes the equation look like this "2Ca + N2 ⟶ Ca3 + N2" since the "Ca" had one atom, we added two more atoms
as we all know 1 + 2 = 3
then that gives us 3 "Ca's" on both sides
hoped this help and good luck on your test! :D
Explanation:
Which statement is true about heat and light energy?
A Heat and light energy always move from colder objects to warmer ones.
B Heat energy moves in many different directions and light energy moves in only one direction.
C Objects do not produce both heat energy and light energy.
D Some objects can absorb both heat energy and light energy.
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Answer:C
Explanation:
Answer:
D.
Explanation:
Got it right on my test, Trust me.
What is the curie used to measure?
a.amount of radiation equaling disintegrations per second
b.amount of radiation biological material absorbs
c.amount of gamma radiation needed to produce a specific number of positive or negative particles
d.amount of radiation needed to produce positive or negative particles due to gamma rays passing through one gram of air
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Answer:
Explanation:
A
Choose all the answers that apply.
Which of the following are physical properties?
flammability
hardness
magnetism
boiling point
density
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Explain how getting sick can affect the body’s ability to maintain homeostasis.
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Answer:
If your body manages to maintain homeostasis, then it means everything is in order, and you are in a healthy state. However, getting sick would indicate that your body conditions are not stable. This happens when the homeostasis is disrupted due to the interference of pathogens such as viruses and bacteria; for example, catching a flu virus would cause you to have a fever, cold, sore throat, and muscle aches. These symptoms eventually weaken your body and prevent you from performing your daily life functions.
The homeostasis has been affected while getting sick due to a change in temperature with disturbed electrolyte balance.
Homeostasis has been the ability of the body to maintain the equilibrium balance of the electrolytes, and elements for the proper functioning of the system.
The homeostasis has been maintained with the temperature and balance of the components in the preset limit. However with the change in the homeostasis results in the change in the balance and functioning of the organs.
While getting sick, we have changes in the body temperature along with electrolyte dis-balance. This results in disturbed homeostasis.
For more information about homeostasis, refer to the link:
https://brainly.com/question/9087319