They
Identify the following as a physical change or a chemical change.
grinding coffee beans
What is a physical change?
Identify the following as a physical change or a chemical change.
ice crystals forming on a frosty morning
Identify the following as a physical change or a chemical change.
burning gasoline in an engine
What is chemical change?
Select True or False. Matter cannot be destroyed.
What is true?
Select True or False. The law of conservation of matter applies to physical changes but not to chemical reactions.
What is false?
Pure water, H2O, is classified as which kind of substance?
What is a compound?
A mixture that does not have a uniform appearance is a(n) _________ mixture.
What is heterogenous?
The measure of gravity acting on the matter in an object is known as .
What is weight?
The change of state that results when solids form directly from a vapor is called .
What is deposition?
Are the particles that are found in a solid iron bar moving? Explain. What happens when the iron bar is heated to its melting point?
Yes. The particles in an iron bar are moving. Solids are comprised of particles that are spaced close together, but the particles vibrate in place. As the iron bar is heated, the particles will move faster. If the iron continues to be heated to its melting point, the kinetic energy will be high enough to partially overcome the particles’ attractive forces and the iron will become a liquid.
Select True or False. Scientific models must be complete and do not change.
What is false?
Select True or False. The orderliness of our world implies that it must have a Creator.
What is true?
Physical science is the study of __________.
What is the study of nonliving matter and the atmosphere?
The SI unit for electric current is the __________.
What is ampere?
Which of the following statements describes the most workable model of matter?
A)Physical matter is a continuum of material.
B)Physical matter can be divided into smaller portions an infinite number of times.
C)Physical matter exists in the form of particles in constant motion.
D)All the above describe the current model of matter.
B)Physical matter exists in the form of particles in constant motion.
Which of the following factors into the accuracy of a measurement?
A)scientist error
B)instrument uncertainty
C)both A and B
D)neither A nor B
C) Both A and B?
Which of the following is evidence of order in nature?
A)daily, weekly, and monthly cycles
B)repeated patterns found in the properties and structure of elements
C)the seasons
D)all the above
D)all the above
The orderly, cyclical process by which we do science is called______.
What is scientific inquiry?
The study of nonliving matter and energy is called____.
What is physical science?
Explain the difference between a theory and a law.
A theory is a model that explains a phenomenon. A law describes a phenomenon and is often represented as a mathematical equation.
Give two examples of how we can use science to fulfill the Creation Mandate.
Caring for God’s creation, replicating the nature of order created by God, inventing products that meet the needs of others, redeeming creation. Other answers are possible.
Which two divisions of science are branches of physical science?
A)chemistry and physics
B)biology and chemistry
C)life science and earth science
D)physics and social science
A)chemistry and physics
Two different elements that are chemically combined form a __________, while two different elements that are only physically combined form a __________.
compound; mixture
Atoms consist of all the following except __________.
What is molecules?
How is it possible that at 101 °C, water is a gas, mercury is a liquid, and titanium is a solid?
Each of these substances has a different degree of attractive forces between its particles. Water is a gas because at 101 °C the attractive forces have been overcome by the kinetic energy of the particles. Mercury is a liquid because it has medium attractions between its particles; titanium is a solid due to its high attractive forces.