Question 1: what is science?
a particular branch of scientific knowledge that we use to solve problems in the world.
Question 2: How is the scientific process used to try to establish the truth?
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The steps of the scientific method are:
1. Ask a Question
2. Do Background Research
3. Construct a Hypothesis
4. Test Your Hypothesis by Doing an Experiment
5. Analyze Your Data and Draw a Conclusion
6. Communicate Your Results
Question 2:How is the scientific process used to try to establish the truth?
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f your data does not work, try doing it again until you get the satisfied answer.
These steps allow for a correct truthful answer to be found, solving a problem.
Question 3: What is chemistry?
chemistry is the study of the properties of matter and how matter changes when it reacts with other materials and what reactions occur.
Question 4: Why study Chemistry?
Chemistry is a crucial part of the daily life of everyone, chemistry explains and creates everything on earth which is why it is a key part of all sciences.
Question 5: What is Matter?
Matter is that which has mass and occupies space, matter is what everything is made of and is the building blocks of the universe. Everything is matter and matter is everything, as long as something takes up space and has a mass it is matter.
Question 6A: What are the building blocks of matter?
objects are made from molecules, molecules consist of atoms, which in turn consist of interacting subatomic particles like protons and electrons. The building blocks of matter all start with some combination of Protons and Electrons.
Question 6B: How is Matter classified?
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in order to make sense of the tremendous amount of information that we can learn about matter, chemists have developed categories of kinds of matter in which to organize the information. If we examine a thing, and decide which category it belongs in, we are classifying it.
Question 6B How is Matter classified?
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Keep in mind that there are several different systems of categories which are not mutually exclusive. When we classify organisms in biology, for instance, we can decide that a particular animal is male and that it is a reptile.
Question 7: What are the three common states of matter, how do they compare in terms of the movement of the particles from which they are composed?
Solid, Liquid and Gas are the three common states of matter. Solid: molecules are moving very slowly and has a definite shape and volume. Liquid: molecules that move freely and a liquid has a definite shape but takes the volume of its container. Gas: molecules move extremely quick and gas takes the shape of its container and it expands to fill the entire container.
Question 8: What types of changes can matter undergo, how can they be distinguished from each other?
Matter can change into three 4 states, Liquid, gas, solid and plasma. Plasma is a state In physics and chemistry, plasma is a state of matter similar to gas in which a certain portion of the particles are ionized. For example lighting is a plasma.
Question 9: what are the most common elements in the human body and in the earth?
Hydrogen is the most abundant element in the human body while Oxygen is the most abundant element in the crust of the earth.
Question 10: How are elements named, and how are their symbols written?
Elements get their names for different reasons, For example Es or EInsteinium was named after Einstein because the element was find in the debris of the first Hydrogen bomb. The Symbol Es was given to show what element it coordinates with for example O-Oxygen or H-Hydrogen
Question 11: what was Daltons atomic theory, whats it based on, what is no longer accepted?
Dalton's Atomic Theory
1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.
Atoms can in fact be destroyed but it is on a very small scale level and only with nuclear reaction
Question 12: What was thompsons model of the atom, what was it based on?
Thompsons atom was a positively charged molecule with negatively charged electrons floating around randomly. based on the electron. Thompson used his new found knowledge to create a model of what as assumed to be the building block of matter, atoms.
Question 13: What was Rutherfords model of the atom, what was it based on?
Rutherford believed an atom had a dense positevly charged center that was surrounded by empty space with in the atom. This is based off of Rutherfords gold foil experiments.
Question 14: What are the three basic subatomic particles, how do they compare in mass and charge, how do atoms of elements differ?
Protons, Neutrons and Electrons are the three main subatomic particles. Electrons and Neutrons have similar mass while Electrons weigh much less. Protons have positive charge, Electrons have negative charge and neutrons add weight but have no charge. A atom of Oxygen is much different from and atom of Xenon or Hydrogen.
Question 15: How was the periodic table developed, why is it called the periodic table, how is it arranged?
Created by Dmitri Mendeleev the periodic table is used to organize elements. The different horizontel rows on the table are called periods thus the name the periodic table. The table is arranged by atomic number but the table also shows mass number, symbol, and many other attributes of an element.