Answer:
a
Explanation:
Aquifers are underground layers of rock that are saturated with water that can be brought to the surface through natural springs or by pumping.
Food undergoes both physical and chemical changes during digestion. Which of the parts of the digestive process listed below is a physical change that takes place in the mouth?
enzymes break down starch into simple sugars
chewing breaks food into smaller pieces.
HELP!
Answer:
1) chewing breaks food into smaller pieces.
Explanation:
Chewing food changes the PHYSICAL appearance. The sugars in the other possible answer will completely change the composition of the food. So therefore, chewing breaks food into smaller pieces, is correct.
are a visual representation of data to show the reader the results of an experiment. Question 3 options:
Data tables
Graphs
1. What are genetically modified foods?
2. What crops are typically genetically modified?
3. Why are crops genetically modified?
4. How are crops genetically modified?
5. How do genetically modified foods affect society and the environment?
Answer:
1. Foods that have changes that are chemically introduced.
2. corn soybeans apples ect
3. sot hey last longer or look better
4. new dna is placed in them and there seeds
5. they are not as good for humans
Explanation:
Answer:
1. Foods that have changes that are chemically introduced.
2. corn soybeans apples ect
3. sot hey last longer or look better
4. new dna is placed in them and there seeds
5. they are not as good for humans
Explanation:
If a 3.0 picogram (pg) sample of curium-245 has a half-life of 8500 years, which conclusion can be drawn?
A: The curium-245 sample must have an age of at least 8500 years.
B: The curium-245 sample must have an age of less than 8500 years.
C: The curium-245 sample will have a mass of about 6.0 pg after 8500 years.
D: The curium-245 sample will have a mass of about 1.5 pg after 8500 years.
Answer:
its A
Explanation:
If a 3.0 (pg) sample of curium-245 has a half-life of 8500 years, then the conclusion which can be drawn is the curium-245 sample will have a mass of about 1.5 pg after 8500 years
What is half life time?Half life time is that time after which initial concentration of reactant becomes half of the initial.
Given that initial concentration of curium-245 = 3pg
After half life time concentration of curium-245 = 1.5pg
The curium-245 sample must have an age of at least 8500 years is wrong as given time is the half life time.The curium-245 sample must have an age of less than 8500 years is wrong as given time is the half life time.The curium-245 sample will have a mass of about 6.0 pg after 8500 years is alo wrong as left sample shold be half of the initial.Hence, the curium-245 sample will have a mass of about 1.5 pg after 8500 years is the conclusion.
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Please, Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:1 chemical reactions, 2 properties,3 substances, 4light, 5 color, 6 precipitate, 7 gas, 8 temperature
Explanation: I think this is it I did this a week ago and that’s what I remember
Answer:
1 chemical reactions, 2 properties,3 substances, 4light, 5 color, 6 precipitate, 7 gas, 8 temperature
Explanation:
this a easy sciences
Please help if you do the food chain has to have the gray wolf in it
Answer:
grass->bug->mice->wolf
Explanation:
Jordan is adding banana peels, egg shells and dead leaves to his garden in the backyard. Jordan is putting __________ into the pile.
A. particle size
B. crystals
C. the main ingredient in soil
D. organic matter
which process is making the pots handle hot?
Answer:
C it is C and
Answer:
A, conduction.
Carbon dioxide is an example of a
Compound
Molecule
Atom
Both a comoound and a molecule
Answer:
i think d
Explanation:
Is the coloring of the peppered moths an example of competition, differential reproductive success, or inherited variation? Explain why.
PLS HELP THIS IS ACTUALLY SCIENCE
What three things do we need to manage for the human population keep growing ?
Answer:
Death rates, Birth rates, and immigration rates
Explanation:
The three things that are required for growing the human population is Death rates, Birth rates, and immigration rates.
What is Death rates, Birth rates, and immigration rates?Birth rate represent the number of live births per 1,000 persons in a year. Death rate represent the number of deaths per 1000 persons in a year. And, migration represent the movement of people from one place to another for better job facilities, living conditions etc.
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A _____________________ Graph is in the shape of a straight line,while a _______________ graph is not a straight.
Answer:
linear and nonlinear
Explanation:
Answer these to ASAP
Answer:The answer is 3
Explanation:
I hope this helps!
Which type of front is occurring at Point A on the map?
a
Cold Front
b
Warm Front
c
Stationary Front
d
Occluded Front
Answer: THE ANSWER IS A ) Cold Front.
Explanation: I GOT A 100 ON THE TEST
GIVING BRAINLIEST FIVE STARS AND HEART!
In your own words explain the difference between potential energy and kinetic energy. Give an example of how one can be transformed into the other.
Explanation:
When an object is at rest, the body is said to possess potential energy. In another case, when the object is in motion, then it is said to possess kinetic energy. Potential energy tends to affect the object within the environment if and only when it gets transformed to other kinds of energy.
Which diagram represents an electrically neutral atom?
Answer:
D
Explanation:
I hope this right, I'm sorry if it's not.
For an atom to be neutral, it has to have the same amount of protons and electrons. Because protons and electrons have opposite charges, when there is an equal amount of them they balance each other out
The diagram that represents an electrically neutral atom is:
Option D
What is an electrically neutral atom?Whenever a molecule has an equivalent number of electrons and protons, it has an equivalent number of -ve electric charges (the electrons) and +ve electric charges (the protons). The all-out electric charge of the 0 is thusly zero and the particle is supposed to be unbiased.
Thus, option D is correct.
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WILL GIVE BRAINLIEST! A student made two lists of advantages and disadvantages: one list for using fossil fuels as energy resources and a second list for using wind and solar energy. Put a checkmark or circle all entries that do not fit accurately into the lists.
Hint: there are 6
Answer: I am not sure but I think its fossil fuel - filling oil and mining coal cause few environmental problems,not dependent on weather condition, not chemical hazard or flammable hazard. Wind and solar - inexpensive, increase carbon footprint and easily stored and transported
Explanation:
I am not quite sure for two of them
Which animal can leave its eggs to hatch and does not need to take care of the infants?
sea turtles
ducks
penguins
platypus
Unbalanced forces are what
During an investigation, students dropped a tarnished penny into a solution of acetic acid and sodium chloride. Tiny bubbles formed around the penny, and the penny was less tarnished after two minutes of soaking in the acetic acid and sodium chloride solution. The student inferred that a chemical reaction occurred.
What evidence supports the student’s inference?
The penny experienced a color change, and a gas was produced.
The penny experienced a color change, and a precipitate was formed.
The penny experienced a color change and is in a new state of matter.
The penny experienced a color change and produced light.
The reaction of acetic acid and sodium chloride produce hydrogen chloride gas and sodium salt of acetic acid. Thus the penny may change its colour by the gas and the evolution of a gas can be observed. Thus option A is correct.
What is acetic acid?Acetic acid is a weak acid with the formula CH₃COOH. It is the simplest carboxylic acid or organic acid after formic acid or HCOOH. Diluted acetic acid is commonly used as vinegar.
Acetic acid reacts with basic or alkaline substances forming its salt. It can also reacts with salts such as sodium chloride producing sodium salt of acetic acid as written below:
[tex]\rm NaCl (aq) + CH_{3}COOH(aq)\rightarrow CH_{3}COONa (aq) + HCl (g)[/tex].
Hydrogen chloride gas is formed in the reaction and and its evolution can be observed during the reaction as bubbles. The penny dropped in the solution may change its color because the HCl formed will reacts with the metal and forms the hydrogen gas and metal halide.
Hence, the penny change its colour and hydrogen gas is evolved. Thus, option A is correct.
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8. Which is electrically attracted to positively-charged particles in an atom?
A) neutrons
B) electrons
C) protons
D) nucleus
Answer:
Electrons
Explanation:
Since electrons have a negative charge, they would attract to the proton to cancel out the charge.
Answer these for me please
Answer:
13- a i think
Explanation:
Which net force occurs when combined forces are balanced?
A. 0 N
B. 50 N
C. 100 N
Answer:
A. 0 N
Explanation:
One force is subtracted from the other to calculate the net force. If the opposing forces are equal, or balanced, the net force is zero.
Hope this helps!
What is a type of mechanical weathering in which rocks are broken by the expansion of water as it freezes in joints, pores, or bedding planes.
The Hint is-the word starts with ic
pls help
Answer:
irozion
Explanation:
Answer:ice wedging
Explanation:
What information must a person have if they are asked to determine an object's speed
Answer:
Distance the object went and the time it took to go that distance (distance, time)
Explanation:
i really need help!! im struggling with my science notes.
what is the fomula to find force?
what is the formula to find mass?
what is the formula to find acceleration?
please help these are due really soon!!
Answer:
formula for force : F=m times a
formula for mass: density times volume
formula for acceleration: change in velocity over the change in time
Explanation:
Answer:
It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s²)
Explanation:
Deanna stirred a teaspoon of sugar into a glass of warm water. The sugar completely dissolved in the water. Check any statement that is TRUE about the dissolved sugar.
(A) The sugar melts.
(B) The sugar loses mass.
(C) The sugar turns into water molecules.
(D) The sugar forms a mixture with the water.
(E) The sugar can be separated from the water.
(F) The sugar disappears and no longer exists.
(G) The sugar molecules are spread among the water molecules.
(H) The sugar breaks down into the individual atoms that make up sugar.
(I) The sugar chemically combines with the water to form a new substance.
Answer:
D
Explanation:
From my experience this is what happens when I put sugar in warm water glass
Deanna stirred a teaspoon of sugar into a glass of warm water. The sugar completely dissolved in the water. The statement that is true about the dissolved sugar is the sugar forms a mixture with the water. Therefore, option D is correct.
What do you mean by solubility ?The term solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specified temperature.
Temperature, pressure, polarity, and molecular size are all factors that influence solubility. For most solids dissolved in liquid water, solubility increases with temperature. This is due to increased vibration or kinetic energy of the solute molecules at higher temperatures.
Water is known as the "universal solvent" because it dissolves more substances than any other liquid. This is critical for all living things on the planet.
Thus, the dissolved sugar is the sugar forms a mixture with the water, option D is correct.
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PLEASE ANSWER FAST THERE IS THE PHOTO
Answer:
convergent
Explanation:
Describe what a moraine is made of and explain how this glacial feature forms.
Answer:
A moraine is a ridge. It is formed when till is deposited at the edge of a glacier. Till is the mixture of sediments that a glacier deposits directly on the surface. Till is made up of many particles of many different sizes.
Explanation:
On quizlet
Golden jackals who are no longer in a pack will trail a tiger so they can feed on what the tiger kills. What type of symbiotic relationship is this?
Answer:
Commensalism
Explanation:
Commensalism Is where one animal has the benift while the other is unharmed, in your question the tiger gets nothing out of the jackal following it but the Jakel gets a free meal. Hope this helped
