Science Semester Exam
In the box shown above, each solid circle represents an atom of the same element. How many different types of molecules are depicted in the above transformation?(look at study guide for box) #36
2
What is the difference between a scientific theory and hypothesis?
A Scientific theory is a combination of facts that has been tested and a hypothesis is an educated guess that has not been tested but must be testable.
Most chemist focus on... A.) Applied research provide us with new technology. B.) basically search to provide us with new technology. C.) Applied research to learn more about our universe. D.) Basic research to learn more about our universe data.
A.)
Strictly speaking, when the lights are turned on an automobile... A.) more gasoline is eventually consumed B.)More gasoline is consumed only if the car engine is running C.) less gasoline is consumed
A.)
Science art and religion do not contradict one another because... A.) all three have different domains. B.) if you choose the right one, you can forget the other two. C.) if you choose religion or art, you can forget about science. D.) if you choose science you can forget about religion and art.
A.) all three different domains.
What happens during a chemical change?
Adams change partners to form a new material or substance.
What is the basic building block of life? What did those objects make?
Atoms and they make up everything
The physical properties of a compound are... A.) A blend of the physical properties of the elements from which it is made B.) uniquely different from the physical properties of the elements from which is made. C.) A result of the physical properties of the elements from which is made. D.) The same as the physical properties of the elements from which is made.
B.)
Which of these statements is a scientific hypothesis? A.) and undetectable energy source is at the center of the earth. B.) The backside of the moon has cities about the size of Chicago. C.) The universe is surrounded by a second universe, which cannot be detected. D.) Michael Jordan is the greatest basketball player of all time.
B.)
Do all objects absorb or emit energy or both?
Both
Which box represents a pure elemental material? (Look at study guide for boxes) #34
Box 1 and 3
Which box shows a pure compound? (Look at study guide for boxes) #35
Box 2
Sciences build on one another. Which sequence best illustrates this? A.) chemistry, physics, earth science, astronomy. B.) Physics, chemistry, astronomy, earth science. C.) Physics, chemistry, earth science, astronomy. D.) Earth science, chemistry, physics, astronomy.
C.)
If two protons and two neutrons are removed from oxygen the element remaining would be...
Carbon
Does the image show a physical or chemical change? (Look at study guide for image) #32
Chemical
Write the scientific name for water. H2O is INCORRECT!!!
Dihydrogen monoxide
Most of the size of an atom, the space it occupies, is in its...
Electron cloud
A compound is made of atoms from different...
Elements
Solid matter is mostly ___________ __________ because the Adams that comprise it are themselves mostly ___________ __________
Empty space
For most all atoms, compared with the atomic number, the atomic mass is...
Greater
The element copper, silver, and gold are in the same...
Group
The feature that makes a hypothesis scientific is that...
It is testable.
In the periodic table, elements that are relatively larger in size appear in there...
Left side of the table
The circles in the box is shown above represent the sub microscopic particles of material and it's three phases. From left to right these are... (look at study guide for boxes) #29
Liquid, solid, gas
What is mechanical energy?
Mechanical energy equals potential + kinetic energy
Most of the atoms in a periodic table are?
Metals
Which have been around longer, the atoms are newborn baby or those an older person? Explain.
Neither because atoms split to form new Atoms
Which type of elements are least able to combine with other elements? (Stuck up elements)
Noble gases
How many experiments does it take to show A hypothesis is false?
One
In science changing your mind when confronted with evidence that does not agree with your thinking is seen as...
Open minded, acceptable
Give an example of a chemical change and physical change.
Physical change: cutting your hair Chemical change: baking a cake
The most basic of the physical sciences is____________
Physics
What is the difference between potential and kinetic energy?
Potential: stored energy kinetic energy: energy in motion
What are the charges of the subatomic particles?
Protons (positive), Neutrons (neutral) and Electrons (negative)
What type of heat transfer does the sun used to get heat energy to earth?
Radiation
Technology is the application of_________?
Science
What is a scientific theory? Hypothesis?
Scientific theory: A vast statement that has been tested Hypothesis: an educated guess must be testable.
The difference between a cup of hot chocolate in a cup a cool chocolate has to do with the difference in molecular...
Solids
What is a scientific fact?
Something that competent observers can observe and agree to be true.
Molecules are considered microscopic, submicroscopic, or macroscopic?
Submicroscopic
How do you find an atoms atomic number given an element?
The atomic number equals the same number as protons and electrons.
For acts as white for animals during the winter?
The insulates heat (insulator)
What are columns and rows called in the periodic table?
The rows are called periods and the columns are called groups.
What does the size of an atom do as you move from left to right on the periodic table?
They get smaller
The electrons called valence electrons reside in...
an atom's outermost shell
Consider molecules of hydrogen gas in molecules of heavier oxygen gas they have the same kinetic energy. The molecules with more speed are....
hydrogen gas will be faster
Most of the mass of an atom is in its....
nucleus
What are the outermost electrons called?
valence electrons
