Why must an experiment have a control group?
Explanation:
The control group provides a baseline in the experiment. The variable that is being studied in the experiment is not changed or is limited to zero in the control group.
Which of the following is not a benefit of scientific literacy?
A. being able to make personal decisions about science-related issues
B. being able to evaluate scientific information
O
c. being able to rely on opinions about science-related issues
D. being able to take part in science-related initiatives
A round red ball is an example of
Physical change
Chemical change
Physical property
Chemical property
Explain why?
Answer:
1
Explanation:
I think that because look at the earth when it spins
A round ball is an example of physical change. Thus option a is correct.
What is physical change?Physical changes are changes which affecting the form of chemical substances but not it's chemical composition. Physical change are the processes in which we can separate mixture from compound, but can't usually be used to separate compound into chemical elements or simplest compound.
Physical change takes place when mixture are can't separate by chemical changes then we separate by the help of physical change. In general a physical change is reversible using Physical means.
A physical change involves a change in physical properties. Example- physical properties including melting, freezing, sublimation etc.
Therefore, a round ball is an example of physical change. Thus, option a is correct.
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Biology
which is the best hypothesis that the experiment could test ?
Answer:
It will be the third one.
Explanation:
Which of the following resources would be considered green energy but not a renewable resource?
1.Wind
2.Solar
3.Hydropower
4.Nuclear
Answer: I think it's Nuclear, sorry if I'm wrong!
Explanation:
Analyzing Relationships Describe how environmental science helped the Trust decide that some dams should be removed.
Answer:Environmental servers build dams to keep water out of areas were animals safe.
Explanation:i just did this one and got it right!
Environmental science helped the trust decide that some dams should be removed dams reduces the complete ecological benefits that can be derived from the free-flowing rivers.
What are Dams?Dams may be defined as a type of barrier that is significantly constructed in order to hold back water and enhance its level that forms a reservoir that is utilized to generate electricity or as a water supply.
Environmental science believed that dams tend to synthesize numerous environmental impacts like alteration in wildlife patterns, destruction of wildlife habituation, interference with the natural flow of water, etc. Dams are also associated with the mechanism of ecological restoration and remarkably interfere with the natural characteristics of water and deteriorate it.
Therefore, environmental science fundamentally supports the trust decide that some dams should be removed.
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20) Do all three states of water have the same density?
Answer:
The same number of particles in a gas spread further apart than in the liquid or solid states. The same mass takes up a bigger volume . This means the gas is less dense. Density also depends on the material.
A microbiologist i under optimal is working with two genera of bacteria, A and B, to determine if cells are competent Strain minuteinti condit and DNA fragments that carry the gene for green fluorescent protein is added to each cut,e o each oulturew samples from each treatment are plated to nutrient agar and incubated, after which the plaes a ony the plates from sationary phase demonstrate fluorescent colonies. What can be concluded from the result? A. Both bacteria A and bacteria B cells are competent. B. Competence in bacteria A is constitutively expressed C. Competence in bacteria B is dependent on the phase of growth D. Neither bacteria A nor bacteria B cells are competence
Answer:
The correct option is C: "Competence in bacteria B is dependent on the phase of growth"
Explanation:
Since this set of cells produced fluorescent bacterial colonies, it means it took up the foreign strain of DNA and integrated in into its own plasmid. Since the other strain of cells was not able to present fluorescent bacterial colonies, something might have gone wrong or mishandled while preparing the competent cells.
what killed the dinosuars?
Answer:
An asteroid
Explanation:
Answer:
There are many theories but one I rely on is that the meteor crashed into the ocean and created a gigantic tsunami along with smoke that both killed the dinosaurs.
WILL MARK BRAINLIEST!!!20 POINTS!!!
Answer:
It is the third bubble, sorry I answered this super late :(
Answer:
the answer is the third bubble:)
Explanation:
Help pls help pls help pls I love biology totalLy
Answer: I think 2 no. it causes porousrock to suddenly harden
Explanation:
People are drilling for petroleum because we all use products that are made of it, like gasoline, heating oil, asphalt (for roads), and plastics. How could you personally reduce your petroleum consumption?
Answer:
Use alternatives to driving/riding in a car or motorcycle (since they consume fuels. Also, avoid purchasing products that contain plastic if you can, and use reusable bags for shopping.
Explanation:
If all your organs are components in the human body system, what body part act as the boundary?
Why do ecosystems that are part of the same biome tend to be similar?
Which types of biomolecules do you predict that you will find in a potato, orange juice, almonds, eggs, salmon and milk? Explain your prediction
Which best describes the scientific process?
A. A guess about a scientific idea
B. A type of mathematics
C. A group of scientists
D. A way to answer scientific questions
Answer:
D.
Explanation:
The scientific method is a way of doing science that helps answer questions. It also helps to obtain new knowledge.
A way to answer scientific questions is the best description of the scientific process. Hence, option D is correct.
What is the scientific method?Through testing and experimentation, the scientific method establishes facts in an unbiased manner. Making an observation, formulating a hypothesis, making a prediction, carrying out an experiment, and then evaluating the findings are the fundamental steps.
The dissemination of the findings is the last phase in the scientific approach. After collecting and examining your data, you come to a conclusion regarding your hypothesis. A conclusion summarises the key takeaways from an experiment.
The best description of the scientific process is a way to answer scientific questions. Therefore, the correct option is D.
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Which of the following is an example of pseudoscience?
A. Electromagnetism
B. Horoscopes
C. Radiometric dating
D. Biology
Assume that you found an object that looks like a dead twig. You wonder if it might be a stick insect. How could you determine if it is a living thing?
Answer:
I determine if the object is a living thing by checking to see if it responds to the environment
Could determine if it is a living being by checking if it responds to stimuli
Living beings or organisms are all complex structures that are characterized by carrying out activities such as:
feeding.development.reproduction.interaction with other organisms.respond to the environment.Some of the most common classifications of living organisms are:
animals.plants.fungi.According to the above, to know if that object is a living organism the best option would be to activate stimuli in it such as vision, touch, smell, hearing, or taste to see if it has any reaction to these stimuli.
For example, you can touch the object and if it moves it shows a response and therefore it is alive.
According to the above, the correct answer is checking if it responds to stimuli
Which of the following would not be facilitated diffusion? A. A chloride ion (Cl-) unlocks a protein channel, and passes through. B. A water molecule passes through a semi-permeable membrane. C. An amino acid exits the cell through an integral protein. D. A large glucose molecule enters the cell through a pore protein.
Answer: It should be D.
Explanation
Facilitated- requires energy- large molecules require energy to go cross the phospholipid bilayer.
Answer:
the answer is not D it is B
Explanation:
Trust
some types of aquatic frogs
bury themselves in the mud and spend the winter hibernating at the bottom of the lakes and ponds which characteristic of life does this represents
Answer:
this represents response to the environment
If an atom like aluminum becomes an ion by losing 3 electrons, what is the
charge on the ion?
1+
2+
3+
3-
Explain using C.E.R (Claim, Evidence, Reasoning) Why there are no planets other than Earth that humans can live on
Explanation:
because there has not been any signs of live and they are not suidable for humans.
If a bullet were to penetrate a lung, which three anterior thoracic body cavities would it enter, and which layer of the serous membrane would it encounter first?
Answer:
First of all is ventral: cavity that makes up the thoracic and abdominopelvic cavity ventral: cavity that makes up the thoracic and abdominopelvic cavity
Secondly it is thoracic: chest cavity
And thirdly it is pleural cavities: which consist of ths lung cavity
That is it will encounter tbe parietal layer of the serous membrane first :lines cavity
Explanation:
The organs in the body are safely guarded by the membrane, cavities and sheaths(which has different compartment). They act to protect the organs in the body like lungs.
A person who was shot with a gun, the bullet must pass the body cavities when moving to the lungs. It must first pass through the 3 cavities before it arrives at the lungs that is the ventral cavity, thoracic cavity and the pleural cavity. The serous membrane is usually found within the walls of the thoracic cavity.
Which continent is 60 n , 100 w
Answer:
Pretty sure Canada or North America
Explanation:
Which dialogue style would you see in a drama? “Where do you want to go shopping?” asked Kate. Aiden said, “Let’s go to a movie.” Javier: I can’t do my homework. I have a terrible headache.
Answer:
javier: i cant do my homework, i have a terrible headache
Explanation:
ive already done it.........
What are some political thing in Europe
Answer:
There are three types of government systems in European politics: in a presidential system, the president is the head of state and the head of government; in a semi-presidential system, the president and the prime minister share a number of competences
Explanation:
can u mark me brainiest?
What nutrients, or matter, must pass through the cytoplasm to reach the cell structures that make up a cell?
Answer:
The correct answer is - amino acid, sugars and fats molecules are major nutrients.
Explanation:
Cell nutrients come in numerous structures, including amino acids, sugars and fats. So as to provide energy to the cell and provide structures, these particles need to go over the cell membrane, which capacities as a barrier that can be pass through different means like endocytosis, diffusion, facilitated diffusion and many more.
plasma membrane is semi-permeable layer which allows specific molecules and substances to pass through the cell and make celular structure and provide energy.
Explain why parents and children don't look exactly alike by posting on the discussion board. Use the vocabulary words: chromosomes, DNA, inherited traits, and mutations in your explanation.
Answer:
Explanation:
Deoxyibonucliec acid(DNA) contains the genetic constituent of an individual for a child or an individual he inherits equal proportion of genetic make up or traits from both mother and father hence, the genetic constituent of a child is never 100% mother or 100% father but a blend of the two to give a new genetic makeup that have never existed before and cannot be entirely identical with either parents but 50% identical with each parent.
Mutation is a sudden change in genome of an organism that is heritable, mutation alters the genetic constituent making it different from the original plan hence, if mutation should occur an individual could have a look that is not identical with the parent because the physical expression is the function of the genetic make up.
Chromosome crossing over effect could also alter the make up of an individual making it different from parental gene.
Order the measurements from smallest to
largest.
Parsec
Light-year
Meters
Astronomical Unit
Gigaparsec
Megaparsec
kilometers
Question 1 (1 point)
What is the benefit of using the metric system and Si Units?
A. to measure accurately on equipment
B. there is no need to use the same system of measurements around the world
C.to convey information accurately so scientists can refer to the same quantity no
matter the location or language
D. so that all measurement systems can be used together
Answer:
The correct answer is - option c. .to convey information accurately so scientists can refer to the same quantity no matter the location or language.
Explanation:
S. I. system is stands for the international system of unit of measurement, it is standardized internationally which is used in most of the nations around the globe so use of SI system be same between different scientists and stream of science.
It is helpful in communicating scientific data accurately so scientists and researchers can refer same quantity no matter region or location and language.
Thus, the correct answer is - option C.