EOG Review Science

Which is the best estimate of the melting point of Rubidium (Rb)?

• 25* C

• 40* C

• 75* C

• 184* C

Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?

• Some of the atoms during the reaction escaped into the air.

• Some of the atoms during the reaction were destroyed.

• Some of the atoms during the reaction became heavier.

• Some of the atoms during the reaction changed to a different kind of atom.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is classified as an element?

• carbon dioxide

• iron

• vinegar

• water

Which best describes the sequence o the elements in Period 5 of the periodic table?

• highly reactive gases, relatively non reactive metals, metalloids, very nonreactive gases, nonreactive nonmetals

• highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmentals, reactive gases

• nonreactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases

• nonreactive gases, nonreactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases

Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?

• group 1

• group 2

• group 16

• group 18

Which is the best example of a chemical change?

• butter melting

• egg cooking

• paper tearing

• water evaporating

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which chemical equation best represents the Law of Conservation of Mass?

Tags

NGSS.MS-PS1-5

What is the definition of CONVECTION

• When heat transfers through waves.

• When heat transfers from objects that are touching.

• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.

• Heat traveling from the sun

Tags

NGSS.MS-ESS2-6

The smallest unit of an element that still has the properties of that element is:

• Proton

• Nonmetal

• Atomic number

• Atom

What is Natural Selection?

• The process were only plants better adapted to their environment tend to survive and produce more offspring.

• The process were only humans better adapted to their environment tend to survive and produce more offspring.

• The process were individuals better adapted to their environment tend to survive and produce more offspring.

• The process were organisms better adapted to their environment tend to survive and produce more offspring.