Chemistry - Chapter 1

Chemistry is defined as the study of:

• only physical changes in matter

• the composition, structure, properties, processes, and energy changes of matter

• only chemical reactions in laboratories

• mathematical equations and formulas

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-3

Which branch of chemistry focuses on the study of properties and changes of matter and their relation to energy?

• Physical chemistry

• Inorganic chemistry

• Biochemistry

• Analytical chemistry

Tags

NGSS.HS-PS1-1

What is the primary difference between basic research and applied research?

• Basic research requires more funding

• Applied research is only done in universities

• Basic research aims to increase knowledge, while applied research solves specific problems

• Applied research takes longer to complete

Which of the following is NOT a branch of chemistry?

• Organic chemistry

• Meteorological chemistry

• Physical chemistry

• Theoretical chemistry

Matter is best defined as:

• anything that has color

• anything that has mass and occupies space

• anything that can be seen

• anything that can change state

What is the smallest unit of an element that maintains its chemical identity?

• A compound

• A molecule

• An atom

• A mixture

In a heterogeneous mixture:

• all components are evenly distributed

• components are not uniformly distributed throughout

Which characteristic is true of pure substances?

• They can be separated by physical means

• They have varying compositions

• They have fixed composition and properties

• They always exist as elements

Water's composition of 11.2% hydrogen and 88.8% oxygen by mass is an example of:

• a. a heterogeneous mixture

• b. an extensive property

• c. a fixed composition of a pure substance

• d. a variable composition

Tags

NGSS.HS-ESS2-5

Extensive properties are those that:

• depend on the amount of matter present

• are independent of the amount of matter

• only apply to elements

• only apply to compounds