a piece of unglazed porcelain used to test a minerals streak

a piece of unglazed porcelain used to test a minerals streak

2 months ago

Solution 1

Guest Guest #9847826
2 months ago
This piece of porcelain is called a streak plate. This method is a method of rapid qualitative isolation and was developed by Robert Koch. It was developed to obtain pure bacterial cultures.

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Question
When do scientist rely on estimates
Solution 1
scientist rely on their estimates when they cannot obtain on exact numbers 

Solution 2

Answer:

The correct answers will be- when the scientists do not not get the expected results in the form of the exact numbers.

Explanation:

Estimation is the process of approximation based on the uncertain or unexpected, unstable and incomplete data.

The process of estimation is sometimes followed by the scientists like when predicting the exact age of the Earth or the evolutionary facts of species which is impossible to predict and the data does not provide the exact numbers.

Thus, scientist relies on estimated when they do not get the expected results in the form of exact numbers.

Question
Compare and contrast critical thinking and inference
Solution 1

Critical thinking: takes a problem and tries to find a solution

Inference: interprets information by reading between the lines

Both: based off of info given to you, open ended based on your perception

Solution 2

Critical thinking: takes a problem and tries to find a solution


Inference: interprets information by reading between the lines


Both: based off of info given to you, open ended based on your perception


Explanation:

Critical thinking is examination what you already apprehend to somebody else. Reasoning is what you're thinking that you recognize thats right.Critical thinking is that the intellectually disciplined method of actively and assuredly conceptualizing, applying, analyzing, synthesizing, and/or evaluating data gathered from, or generated by, observation, experience, reflection, reasoning, or communication, reasoning is a conclusion reached on the idea of proof and reasoning.




Question
how is groundwater formed?
Solution 1
Groundwater is formed in one of several ways. It can trickle down through the sand and rock from the rain and other types of precipitation. Groundwater can also come from underground streams or rivers or even from the aquifer that is located beneath the rocks under the ground. This water has existed from the beginning of time and moves through a cycle. It evaporates, becomes rain, falls back to the Earth, and then continues into the ground.
Solution 2
Groundwater is formed when water percolates down through the soil.
Question
what type of consumers are in temperate grassland
Solution 1
Consumers in temperate grassland:

Plant:
Grasses are the dominant vegetation. Trees and large shrubs are largely absent. Seasonal drought, occasional fires and grazing by large mammals all prevent woody shrubs and trees from becoming established. A few trees such as cottonwoods, oaks and willows grow in river valleys, and a few hundred species of flowers grow among the grasses. The various species of grasses include purple needlegrass, blue grama, buffalo grass, and galleta. Flowers include asters, blazing stars, coneflowers, goldenrods, sunflowers, clovers, psoraleas, and wild indigos.

Animal:
Temperate grasslands have a low diversity of wildlife, but a high abundance of wildlife. In North America the dominant grazing animals are bisons and pronghorn. Rodents include pocket gophers and prairie dogs. Carnivores include wolves, coyotes,swift floggers, badgers and black-footed farrets. Birds include grouses, meadowlarks, quails, sparrows, hawks and owls.
Question
 Consider a bathtub filled with water, with a plug in the drain. How long would this be considered a closed system?
Solution 1
For a closed system, you need two things:
1) a conservation of mass within the boundaries of the system
2) the ability to freely exchange energy to & from the "closed" system with a surrounding external system


So, the answer is never, since your defining the "system" as the water within the bathtub, and an open bathtub is exposed to evaporation, which is not conserving mass within the defined "system".
Solution 2

Answer:

The answer is a few seconds

Explanation:

Question
If H2O is water and H2O2 is Hydrogen Peroxide. What is H2O4?
Solution 1
 I think it means hydrogen peroxide .....
Solution 2
H204- hydrogen superoxide
Question
The number of protons in one atom of an element determines the atom's ____________, and the number of electrons determines ____________ of an element.
Solution 1

Both the number of protons and the number of electrons of an atom determine

its atomic number, as in an atom ( but not in an ion ).   

Solution 2
The number of protons in one atom of an element determines the atom's electrons  and the number of electrons determines the velency of an element
Question
What happens in any chemical
change?
Solution 1


There is an exchange of electrons in a conventional reaction.  If the nuclei of atoms

are involved, I'm not quite sure, but those chemical reactions of nuclear particles

are studied in nuclear chemistry.

Question
Describe the limitations of using models to represent atoms
Solution 1


Usually, a model is a depiction of a certain entity, never the real thing.  In times

past, many, many models look great on paper but are way off!

Question
The periodic table shows that a carbon atom has six protons. This means that a carbon atom also has...
Solution 1
6 electrons because 
p = e .
thats it 

Solution 2

According to the structure of atom, carbon atom with 6 protons also has six electrons .

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

https://brainly.com/question/13654549

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