2nd 3wk Assessment

A student heats a beaker of water on a hot plate. After several minutes, bubbles begin to form as the water boils.

What happens to the kinetic energy of the water molecules as the temperature increases?

• It decreases because the water molecules slow down.

• It stays the same because water molecules always move at the same speed.

• It increases because the water molecules move faster.

• It disappears when the water turns to steam.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A student compares the particles in three different models.

Model A shows tightly packed particles vibrating in place, Model B shows particles close together but sliding past one another, and Model C shows particles far apart and moving freely.

Which statement BEST describes the states of matter represented?

• Model A is a liquid, Model B is a gas, Model C is a solid.

• Model A is a solid, Model B is a liquid, Model C is a gas.

• Model A is a gas, Model B is a solid, Model C is a liquid.

• Model A is a solid, Model B is a gas, Model C is a liquid.

Tags

NGSS.MS-PS1-1

A student places equal volumes of ice, liquid water, and water vapor in three containers.

Which statement BEST compares their shape, volume, and particle motion?

• Solids and liquids take the shape of their container, gases do not.

• Solids have definite shape and volume, liquids have definite volume but no shape, gases have neither.

• Liquids have definite shape and volume, solids have definite volume only, gases have definite shape only.

• Solids, liquids, and gases all have definite volume, but only solids have definite shape.

A student compares two unknown elements.

-Element X is shiny, conducts electricity, and can be hammered into thin sheets.

-Element Y is brittle, dull, and does not conduct electricity.

• Element X is a nonmetal, and Element Y is a metal.

• Element X is a metalloid, and Element Y is a metal.

• Element X is a metal, and Element Y is a nonmetal.

• Element X is a rare earth element, and Element Y is a metalloid.

A class is testing samples of four elements.

One element has properties of both metals and nonmetals: it is somewhat shiny, brittle, and a semiconductor of electricity.

Which type of element are they most likely testing?

• metal

• nonmetal

• metalloid

• rare earth element

A scientist compares silicon, gold, and sulfur:

-Gold is shiny, bends without breaking, and conducts electricity.

-Silicon is shiny but brittle and conducts electricity poorly.

-Sulfur is dull, brittle, and does not conduct electricity.

Which statement BEST explains the differences in classification based on physical properties?

• Gold is a metal, silicon is a metalloid, and sulfur is a nonmetal

• Gold is a nonmetal, silicon is a metal, sulfur is a metalloid

• Gold and silicon are metals, sulfur is a nonmetal

• Gold is a metalloid, silicon is a metal, sulfur is a rare earth element

Which statement correctly categorizes the elements?

• Element 1 is a metal, like silver and Element 2 is a nonmetal, like sulfur.

• Element 1 is a nonmetal, like sulfur and Element 2 is a metal, like silver.

• Element 2 is a metal, like silver and Element 1 is a metal like iron.

• Element 2 is a nonmetal, like oxygen and Element 1 is a nonmetal, like sulfur.

Which is NOT a property of metals?

• Brittle

• Conductivity

• Ductility

• Luster

What are two properties that make a metal a good choice to use as a wire in

electronics?

• conductivity, malleability

• ductility, conductivity

• luster, malleability

• malleability, high ductility

Tags

NGSS.MS-ETS1-1

A student examines two samples:

-Sample A contains only distilled water.

-Sample B contains sugar dissolved in water.

Which statement BEST describes the difference between these two samples?

• Sample A is a homogeneous mixture, Sample B is a pure substance

• Sample A is a pure substance, Sample B is a homogeneous mixture

• Sample A is a heterogeneous mixture, Sample B is a pure substance

• Sample A is a solution, Sample B is a heterogeneous mixture