Science 8: Matter

Who conceived the idea that matter was made up of tiny, indivisible atoms?

• Dalton

• Democritus

• Aristotle

• Newton

What is the basic unit of matter?

• Molecule

• Element

• Compound

• Atom

If atoms are neither created nor destroyed in chemical reactions, what does this support?

• The law of conservation of mass

• The law of constant composition

• The law of multiple proportions

• The law of definite proportions

Why does ice melt into liquid water when enough energy is supplied?

• The process is exothermic

• The process is endothermic

• The process is isotropic

• The process is anisotropic

What is the term for the process where heat is released by a substance?

• Endothermic

• Exothermic

• Isotopic

• Anisotropic

What does the space-filling model show?

• The comparative sizes of atoms and molecules

• The arrangement of electrons in an atom

• The arrangement of protons in an atom

• The arrangement of neutrons in an atom

Why is the concept of the particulate nature of matter the foundation of modern chemistry?

• It explains the behavior of matter in macroscopic form

• It explains the behavior of matter in microscopic form

• It explains the behavior of matter in both macroscopic and microscopic forms

• It does not explain the behavior of matter

If you were to create a new element, what would it be composed of?

• Different types of atoms

• Only one type of atom

• Molecules

• Compound

What are molecules?

• Aggregates of at least two atoms held together by a chemical bond in a definite arrangement

• Single atoms that are not combined with any other atoms

• Substances that contain only one type of atom

• Substances that contain different types of atoms combined in complex ratios

What happens during an endothermic phase change?

• Heat is absorbed by matter

• Heat is released by matter

• Matter remains at a constant temperature

• Matter decreases in temperature