Answer:
Boiling water
Explanation:
Boiling water is an example of physical change as it does not cause any change in the chemical composition of water.
What are physical changes?Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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need help with this asap!!
Answer:
which part do you need help with?
Atoms of two different elements must have o ferent
electrical charges.
numbers of neutrons.
o atomic numbers.
O energy levels.
Answer:
atomic numbers
Explanation:
In order for two atoms to be different, they have to have a different number of protons. Protons are represented by the atomic number. Thus, atoms of two DIFFERENT elements must have different atomic numbers.
I took the test and got 100%
Hope this helps!
Students in Mr. Painter's science class studied samples of pond water using a microscope. To prepare for the experiment, the students placed a drop of pond water on each microscope slide, and then covered the drop with a cover slip that was marked with a 1 mm grid. Using the microscope to view the slides, students counted how many of each type of organism they found in each 1 mm square. Finally, each student calculated the total number of each type of organisms. Their data is shown below. Which organism is the least plentiful in the pond water studied? A. amoeba B. volvox C. euglena D. paramecium
Answer:
Euglena
Explanation:
the least plentiful organism in the pond water studied. Each student found fewer euglena than any other organism.
I’m pretty sure there is 3. Can someone help me?
Answer:
D. rigidity and shape that's why in plants they stand upright for photosynthetic process.
What happens to air pressure as the altitude increases?
O It gets lower
o It gets higher
0 It stays the same
Answer:
Pressure with Height: pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.
Explanation:
help............ty.......
If a lady walks into a room wearing perfume, eventually everyone in the room will be able to smell the perfume even if they are not standing right next to her. Which of the following principles does this observation best support?
Answer:
the particles will eventually fill the space of the room, which is why people will be able to smell her perfume. this is called diffusion.
Explanation:
Answer:
A.
Atoms and molecules are always in motion.
Explanation: Study island
i need the awnsers asap!! please and thanks
Answer:
C
Explanation:
Why are cells stained?
1 point
To make the cell turgid
To nourish the cell.
To help in cell multiplication.
To highlight the cell organelles.
Answer:
To highlight the cell organelles
The basic reason that cells are stained is to enhance visualization of the cell or certain cellular components under a microscope.
The table shows the masses of different samples of liquid. Which sample has the greatest DENSITY?
A) Sample A
B) Sample B
C) Sample C
D) Sample D
Answer:
you cant see the samples
Explanation:
can someone help me??
Answer: it could be the rabbit or lizard
Explanation:
Because some lizards don’t eat meat an some do
How did the Jesuits spread the Catholic faith among the masses?
In Catholic Religion, Jesuits were the religious community called the Society of Jesus. ... They were able to win faith among people by spreading the teaching of Jesus and caring for the sufferings. Jesuits (Missionaries) also established Catholics school in many regions which focused on the teaching of Jesus
Explanation:
Answer:
In Catholic Religion, Jesuits were the religious community called the Society of Jesus. ... They were able to win faith among people by spreading the teaching of Jesus and caring for the sufferings. Jesuits (Missionaries) also established Catholics school in many regions which focused on the teaching of Jesus.
Explanation:
what's the difference between pseaudscience and science
Answer:
hope it helps..
Explanation:
Pseudoscience is differentiated from science because – although it claims to be science – pseudoscience does not adhere to accepted scientific standards, such as the scientific method, falsifiability of claims, and Mertonian norms.
which of the following is NOT a component of a virus
Answer:
what are the options
Explanation:
How are DNA tests useful to solve a more mystery? Explain in your own words.
Explanation:
forensic scientists can compare DNA found at the crime scene from blood or hair to DNA samples taken from suspects if there is no match they may be able to rule out that suspect. if there is a match police would likely want to take a closer look.
Identify the following groups by name and give the number of valence electrons in each...
1. Group 1 (1A):
2. Group 2 (2A):
3. Group 3-12:
4. Group 14 (4A):
5. Group 15 (5A):
6. Group 16 (6A):
7. Group 17 (7A):
8. Group 18 (8A):
(this is talking about the periodic table
Answer:
it's really simple, all you need to do is look at the periodic table. for example, group 1A has 1 valence electron. 2A has 2, 3A has 3, and so on.
Which term defines a small, irregularly shaped body made of rock or organic material that orbits the sun
Answer:
Meteoroids is the answer.
Explanation:
Offspring Alleles
Leg
Eye
Fur
Tail
Fire
20
Answer:
Eye
Explanation:
What is a living cell ?
Answer:
A living cell is the basic unit of structure and function in living organisms.
All plants are unicellular organisms
Answer:
All true plants are regarded as multicellular organisms since they consist of more than a single cell.
Answer:
False
Explanation:
give scientific reason:-
space debris is a major problem
Answer:
yes
Explanation:
because it would make a space as a dirty
Suppose a massive amount of salt were suddenly dumped into one region of the ocean. The movement of water would be affected by the sudden increase in salt.
Identify the changes in salinity and density.
Describe the type of ocean current that would result
Answer:no
Explanation:because salt has been taken from the ocean only
1. Which type of reaction has water in its products?
a. Hydrolysis
b. Dehydration synthesis
2. What type of reaction uses water as a reactant?
a. Hydrolysis
b. Dehydration synthesis
Answer:
1. b. Dehydration synthesis
2. a. Hydrolysis
Explanation:
Hydrolysis is the process where water is used to break chemical bonds. Dehydration synthesis is the reverse reaction, where a bond is formed resulting in the loss of water from the molecule, so a water molecule is generated as a product.
That means that dehydration synthesis produces water, and hydrolysis uses water.
Answer:
b. Dehydration synthesis gives out water as a product.
a. Hydrolysis reaction uses water as a reactant.
Explanation:
b. Dehydration synthesis can be defined as, formation of larger molecule from small reactant, followed by loss of water from the reaction.
They are also called condensation reactions.a. Explanation: Hydrolysis, it is the reaction in which compound is interacted with water which results in the degradation of that particular compound.
Hydo means water, lysis means to dissolve or breakdown.What does the measurement 45 N represent in the photograph?
Answer:
The magnitude(size) of a force
Explanation:
Apex
The measurement of 45 N represents the magnitude of force in the photograph.
What is force?Force is defined as a cause which is capable of changing the motion of an object. It causes an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as a direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object while torque produces change in rotational speed of an object.
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Sir Nurse compares the biological cell to the physical atom. Do you think this is a good comparison? What strengths does this comparison have? What weaknesses does it have?
Answer:
No
Explanation:
Cells and Atoms both have a nucleus, even though they are made of different things. They make up the main structure of the cell or atom. The weakness is that is all they have in common
Explain in simple molecular terms what would have to be done to a plant oil to transform it to a trans fat?
pe and size.
2. A metal coin has certain properties that can be
measured. Which property of a coin is different
on the moon than it is on Earth?
5.
A. mass
B. weight
C. volume
D. density
SUMMATIVE REFLECTION: What are living things made of? Set a timer for five minutes. Write small. Fill the space below with everything that you remember about biochemistry.
Answer:
All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.
Explanation:
All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.
Which of the following occurs just before the cell enters the G2 stage of
the cell cycle? *
O The nuclear membrane disintegrates.
O DNA replicates
O Centrioles form
O The nucleolus divides
Answer:
DNA replicates
Explanation:
S phase (Synthesis Phase) During this phase, the cell makes a variety of proteins that are needed for DNA replication. During S phase, which follows G1 phase, all of the chromosomes are replicated. Following replication, each chromosome now consists of two sister chromatids, the synthesis phase of interphase takes the longest because of the complexity of the genetic material being duplicated. Throughout interphase, nuclear DNA remains in a semi-condensed chromatin configuration
How do polar bear adapt to its environment?
Answer:
Polar bears have thick fur coats that help keep them keep warm in cold conditions. They have a dense layer of fur close to the skin and an outer layer of longer fur. The inner layer isulates them against the cold. ... The skin underneath their fur is black and absorbs the heat from sunlight, helping them stay warm.
Explanation:
The way polar bears adapt to their environment is because of their thick warm coat.