Answer:
The experiment can be changed by others to get different results.
Explanation:
Which of the following situations provides evidence that a chemical change has taken place?
A.water, when boiled, evaporates, and turns into vapor
B.Sugar, when added to iced tea , dissolves into the liquid
C.Two liquids are mixed, in a solid substance formed
D. A piece of paper is cut into many small pieces
Answer:
A
Explanation:
be it’s a Chemical change not a physical change
Two liquids when combined to form a solid substance is an example of chemical change as rearrangement of atoms takes place in the process.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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The skateboarder moves himself forward by pushing back with his foot on the ground. Which of Newton’s laws says for every action, there is an equal and opposite reaction.
Law of inertia
Law of acceleration
Law of action-reaction
Answer:
Law of action-reaction
Explanation:
Every action results in an equal and opposite reaction
What kind of mixture is described below? Explain your reasoning.
"The pieces remain separate and do not combine."
Try for two complete sentences.
a homogenous
b heterogenous
Which of the following are examples of chemical energy being released or stored?
A boy eating an orange to survive
A car burning gasoline to move
The sun heating a rock
I only
I and II only
I and III only
I, II, and III
Answer: I and II
Explanation:
I'LL GIVE BRAINLIEST TO THE BEST ANSWER!!!!
Scenario:
Espresso Coffee Houses is designing a coffee mug that keeps liquids hot. The research department tested several different materials for their ability to keep a normal-sized cup of coffee hot the longest amount of time. The testing room temperature is approximately 25 degrees Celsius.
Prompt:
Write a scientific explanation to justify the selection of material, A, B, or C, used to create the cup that would keep the coffee the hottest for the longest period of time. (THIS IS YOUR CLAIM.)
What is your evidence (for the claim)?
What is your reasoning?
Answer:
So whats the question
Explanation:
please help! 40 points, a thanks, and brainliest if answered correctly!
"Describe global influences on local weather."
please include 2-3 complete sentences with proper reasoning
(sorry if i put the subject wrong by the way)
Answer:
The impact on local weather on people is they use scary real things to trick you into thinking in is truthful
Answer:
global climate change is a long tern changes in weather patterns that have pervioulsy defined the climate of different areas of the planet. Effects of global climate change such as rising ocean temperatures and the melting of polar ice caps is one
Iron oxide F E 2 O 3 is formed when iron F E and oxygen (O2) react in the presence of water (H2O) in the air. Why is the formation of rust, iron oxide, considered a chemical change? I WILL MAKE YOU BRAINLIEST
A. Rust is a new substance with different properties than oxygen or iron.
B. None of the above.
C. Rust is a mixture of iron and oxygen.
D. Rust has the same chemical formula as oxygen and iron.
Answer:
A
Explanation:
bro
even though it is invisible, the air is composed of matter. In your own words, explain why this is true
in my own words i would say air isinvisable because if it was a seeable matter it would need to consest of alot more atom so we would not be able to breath
Lexi is balancing equations. She is finding one equation to be very difficult to balance. Which explains how to balance the equation ZnSO4 + Li2CO3 → ZnCO3 + Li2SO4?
One reactant and one product needs the coefficient 2.
The products both need a 3 coefficient.
The reactants both need a 2 coefficient.
Atoms in the equation are already in balance.
The statement that best explains how to balance the equation: ZnSO4 + Li2CO3 → ZnCO3 + Li2SO4 is: atoms in the equation are already in balance.
HOW TO BALANCE A CHEMICAL EQUATION:
A chemical equation is said to be balanced if the number of atoms of each element in the reactant side is equal to that on the product side.In the equation given in this question as follows:
ZnSO4 + Li2CO3 → ZnCO3 + Li2SO4
There are:1 atom of Zn on both sides of the equation1 atom of sulfur on both sides of the equation7 atoms of oxygen on both sides of the equation2 atoms of lithium on both sides of the equation. Since the number of atoms of each element on both sides of the equation are the same, hence, the equation is said to be balanced. Therefore, the statement that best explains how to balance the equation: ZnSO4 + Li2CO3 → ZnCO3 + Li2SO4 is: atoms in the equation are already in balance.Learn more at: https://brainly.com/question/7181548?referrer=searchResults
Answer: its d
d. Atoms in the equation are already in balance.
Explanation:
What
are some
ways we
can see air?
Answer:
smoke, fog
Explanation:
A model of a hydrogen atom is represented below. Labels A, B, and C represent different subatomic particles. I WILL MAKE U BrAINLIEST
Structures A and B are located in the?
A. nucleus
B. electron cloud
C. valance shell
D. energy level
Answer:
The answer i A.
Explanation:
No further Explanation.
How should each form of energy be identified?10 points help ASAP
O Energy A: gravitational energy
Energy B: chemical energy
O Energy A: nuclear energy
Energy B: electrical energy
O Energy A: electromagnetic energy
Energy B: sound energy
O Energy A: mechanical energy
Energy B: thermal energy
What is the other-feeders and self-feeders for paramecia?
Write your response below
Answer:
Paramecium (also Paramoecium, is a genus of unicellular ciliates, commonly studied as a representative of the ciliate group. Paramecia are widespread in freshwater, brackish, and marine environments and are often very abundant in stagnant basins and ponds. Because some species are readily cultivated and easily induced to conjugate and divide, it has been widely used in classrooms and laboratories to study biological processes. Its usefulness as a model organism has caused one ciliate researcher to characterize it as the "white rat" of the phylum Ciliophora
Explanation:
Name the layers of Earth starting at the crust and going in. Describe the composition of each layer.
Enter your answer in the space provided.
Plss help!!! You'll be Brainliest!
- Earth Science
Answer:
the inner core, the outer core, the mantle and the crust
Explanation:
put that backwards and theres ur answer
When a fan turns on, what is the electric energy turning into?
Answer:
kinetic energy
Explanation:
Answer:
The fan converts electric energy into kinetic energy that does work, and it converts some electric energy into heat.
Explanation:
Bart believes that mice exposed to radio waves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. he found that 8 out of 10 of the radio-waved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same.
In Bart's Experiment, identify the Independent Variable.
Group of answer choices
Amount of Time for Test
Exposed Time to Radio Waves
Number of Mice in each Group
Number of Mice that pushed block away
Size of Blocks
In Bart's Experiment, identify the Dependent Variable.
Group of answer choices
Amount of Time for Test
Exposed Time to Radio Waves
Number of Mice in each Group
Number of Mice that pushed block away
Size of Blocks
In Bart's Experiment, identify the three Controlled Variables. (must choose all three!)
Group of answer choices
Amount of Time for Test
Exposed Time to Radio Waves
Number of Mice in each Group
Number of Mice that pushed block away
Size of Blocks
can i have brain?.........................................................................
Comment if your doing something for Halloween
Answer: I am
Explanation:
Having a party
Answer:
im dressing up as mr. potato head :)
Explanation:
The periodic table organizes all the known elements in a way that gives the reader many clues as to the element's properties and make-up. What can you infer about copper (Cu, atomic number 29) and silver (Ag, atomic number 47) based on their positions relative to EACH OTHER on the periodic table?
Please hurry!
Answer:
The periodic table of the elements places the elements according to their atomic number, electronic configuration and chemical properties. Thus, depending on the location of an element in the periodic table, we can guess its electronic configuration and more importantly, its properties.
Explanation:
Oil is a powerful source of energy used for cars, machines, and many other purposes. While studying sources of energy that could replace the use of oil, a student thinks about solar power, wind power, nuclear power, and electric batteries. The students asks,"Which type of source will waste the least energy and provide the most energy in all situations?"
Which best describes why a scientist would ask a different question than this one?
O The question asks about subjective personal preferences regarding energy.
O The question focuses on the objective measurements of amounts of energy.
O The question has too wide of a focus, as though all situations can be studied at once.
O The question is focused on the future and finding new answers about changing needs.
Answer:
C
Explanation:
scientists usually focus on one specific problem, rather than a whole range. so the answer would be that it's too wide a focus.
btw this is where the crown is on the bottom of the question
Answer:
c
Explanation:
Give three examples for the word "Flood"
thanks, make sure u add one of them "natural disasters" thanks and please answer
worth points and brainliest!
grade 6 science class
Answer:
natural desasters
Explanation:
Why does the transition of light waves from water to air make it seem as if fish and other things in a pond are shallower than they actually are?
Answer:
An object seen in the water will usually appear to be at a different depth than it actually is, due to the refraction of light rays as they travel from the water into the air. This tutorial explores how fish, observed from the bank of a pond or lake, appears to be closer to the surface than they really are
This body of water can be described as: The part of the mouth of a stream in which the water level is influenced by the lake or sea into which the stream flows. This is where fresh river water mixes with ocean water.
A. estuary
B. mangrove swamp
C. salt marsh
D. watershed
Answer:
im thinking A
Explanation:
A barometer is used to measure
a.
wind speed
c.
air pressure
b.
wind direction
d.
precipitation location
Please select the best answer from the choices provided
A
B
C
D
Answer:
c
Explanation:
Think about a pond ecosystem and come up with 3 examples of biotic and abiotic relationships.
Answer: 3 examples of relationships between abiotic and biotic factors in the ecosystem are plants use sunlight, water, and carbon dioxide to make food. Another example is the interaction between turtles and soil, some turtles are known to bury themselves in the soil. Elephants and water interact as well in order to stay hydrated elephants drink water.
Explanation:
Explain how errors in measurements can affect the safety of products. (It an essay)
Answer:
An error or fault can be described as the disparity between the calculated worth and the exact worth. For instance, if the two machinists use a similar instrument for discovering the errors in measurement, it is not required that they may acquire the related outcomes. But, there will be a slight variation between both the measurements which is known as an error. In sequence, to know the idea of errors in measurement, one has to recognize the two conditions that describe the error namely measured value as well as true value. The “true value” is unfeasible to find out the accuracy of measurement by experimental means that can be defined as the standard value of a countless number of calculated values. This value can be described as the expected value of true value which can be established by taking numerous calculated values throughout experimentation.
Explanation:
maybe this will help
Answer:
An error or fault can be described as the disparity between the calculated worth and the exact worth. For instance, if the two machinists use a similar instrument for discovering the errors in measurement, it is not required that they may acquire the related outcomes. But, there will be a slight variation between both the measurements which is known as an error. In sequence, to know the idea of errors in measurement, one has to recognize the two conditions that describe the error namely measured value as well as true value. The “true value” is unfeasible to find out the accuracy of measurement by experimental means that can be defined as the standard value of a countless number of calculated values. This value can be described as the expected value of true value which can be established by taking numerous calculated values throughout experimentation.
Explanation:
An error or fault can be described as the disparity between the calculated worth and the exact worth. For instance, if the two machinists use a similar instrument for discovering the errors in measurement, it is not required that they may acquire the related outcomes. But, there will be a slight variation between both the measurements which is known as an error. In sequence, to know the idea of errors in measurement, one has to recognize the two conditions that describe the error namely measured value as well as true value. The “true value” is unfeasible to find out the accuracy of measurement by experimental means that can be defined as the standard value of a countless number of calculated values. This value can be described as the expected value of true value which can be established by taking numerous calculated values throughout experimentation.
maybe this will help
What occurs along a divergent plate boundary?
grade 6 science class
Answer:
A earthquake
Explanation:
DONT ANSWER I FOUND IT ALREADY
Which best describes the purpose of the ice in this experiment?
A. The ice melts into the flask causing a cloud to form.
B. The ice cools the air around the flask, causing a cloud to form in the flask.
C. The ice is used to hold the water in the flask so that it can't escape.
D. The ice causes the water vapor in the air above the warm water to change, forming a cloud.
Answer:
what is the experiment try d
Answer:
PLEASE HELP MEEEE (SAME QUES)
Explanation:
1: if we have any substance, can be concluded that a chemical if has happed -
A . there is a color change
B. the state of matter change
C.there is a decrease in mass.
D. the matter is stirred thoroughly
Answer:
option A. There is a color change
If we have any substance, can be concluded that a chemical than there is a color change. Thus, option A is correct.
What is molecule?
A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions which satisfy this criterion.In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions.
The simplest forces between atoms are those which arise as a result of electron transfer. A simple example is that of say sodium fluoride. The sodium atom has a nuclear charge of +11, with 2 electrons in the K shell, 8 in the L shell and 1 in the M shell. The fluorine atom has a nuclear charge of 9 with 2 electrons in the K shell and 7 in the L shell. Two or more atoms held together with bonds make up a molecule.
Therefore, If we have any substance, can be concluded that a chemical than there is a color change. Thus, option A is correct.
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Which sources of energy can be used to turn turbines to produce electrical energy?
Lightning and fuel
Tides and clouds
Water and the sun
Wind and water
Answer:
Wind and Water
Explanation:
wind turbines and wave power
Answer:
Wind and water
help i give brainliest and 50 points to whoever doess plz
Answer:1. Saturated zone
2. the water table
3. Aquifer
4. Land subsidence
Explanation:The saturated zone beneath the water
An aquifer is defined as a body of rock or unconsolidated sediment that has sufficient permeability to allow water to flow through it.
Land subsidence occurs when there is a loss of support below ground. This is most often caused by human activities, mainly from the overuse of groundwater, when the soil collapses, compacts, and drops.