GRADE 8 JEOPARY FINALS

MATTER

100

Question: Two or more atoms chemically combined form a ______

MOLECULE

200

Question: The smallest particle of an element that retains the chemical properties of that element is an ______.

ATOM

300

Question: The state of matter with no definite shape or volume, filling any container it occupies.

GAS

400

Question: The amount of space occupied by a substance.

VOLUME

500

Question: The amount of matter in a substance.

MASS

CHANGES

100

Question: The process by which water vapor in the atmosphere turns into snow crystals.

DEPOSITION

200

Question: A change that alters the form or appearance of a substance but does not change its chemical composition.

PHYSICAL CHANGE

300

Question: The change of state which occurres when water vapor comes into contact with a cold window, and turns into liquid water.

CONDENSATION

400

Question: The change of state from a gas directly to a solid, such as the formation of frost

DEPOSITION

500

Question: The process where a liquid transforms into a gas throughout its volume, often requiring heat and occurring at or above the boiling point.

EVAPORATION/BOILING

SCIENTISTS

100

Question: This scientist proposed the concept of "atomos," suggesting that matter is made of indivisible particles.

Answer: Leucippus and Democritus

200

 Question: He is known for his atomic theory, which included postulates such as atoms of the same element being identical and atoms combining in whole-number ratios.

JOHN DALTON

300

Question: Through his gold foil experiment, he discovered the nucleus and proposed that atoms have a dense, positively charged center.

ERNEST RUTHERFORD

400

Question: He discovered the neutron, a neutral particle located in the nucleus of an atom.

JAMES CHADWICK

500

Question: This scientist is known for developing the quantum mechanical model of the atom, which describes electrons as existing in probability clouds.

Erwin Schrödinger

ELEMENTS

100

Question: The element that has 1 proton is ______.

HYDROGEN

200

Question: The number of protons in an atom, which determines the element's identity, is called the ______.

ATOMIC NUMBER

300

Question: If an atom has 15 protons and 16 neutrons, what is its mass number?

31

400

Question: An atom has a mass number of 23 and 12 neutrons. What is its atomic number?

11

500

Question: If you know the atomic number and mass number of an atom, how do you calculate the number of neutrons?

Mass number minus atomic number

GENERAL

100

Question: The process of separating a liquid from a solid by passing the mixture through a filter.

FILTRATION

200

Question: A mixture where the components are not uniformly distributed and can be visually distinguished.

Heterogeneous mixture

300

Question: A pure substance that cannot be broken down into simpler substances by chemical means.

ELEMENT

400

Question: The simplest unit of a substance, that is made of two or more atoms, which retains all the properties of that substance. Answer: Molecule

MOLECULE

500

Question: In a saltwater solution, the substance that gets dissolved in the water is called the __________.

SOLUTE