Unit 2 Post Assessment Remediation (PAR)

Which process represents a chemical change?

• Iodine sublimes.

• Water evaporates.

• An ice cube melts.

• A candle burns in air.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which substance can not be broken down by a chemical change?

• ammonia

• ethanol

• krypton

• water

Which statement describes a mixture of sand and water at room temperature?

• It is heterogeneous, and its components are in the same phase.

• It is heterogeneous, and its components are in different phases.

• It is homogeneous, and its components are in the same phase.

• It is homogeneous, and its components are in different phases.

Which type of matter is represented by the particle diagram?

• an element

• a compound

• a homogeneous mixture

• a heterogeneous mixture

Tags

NGSS.MS-PS1-1

Which two particle diagrams each represent a sample of one substance?

• I and II

• I and III

• II and III

• II and IV

Tags

NGSS.MS-PS1-1

Which particle diagram represents a mixture of an element and a compound?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Given the diagram of a laboratory apparatus, this apparatus is used for which process?

• filtration

• distillation

• chromatography

• electrolysis

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A student is filtering a mixture of sand and salt water into a beaker. What will be found in the beaker after the filtration is completed?

• sand, only

• salt, only

• sand and salt

• salt and water

Which form of energy is converted to thermal energy when propane burns in air?

• chemical

• electrical

• mechanical

• nuclear

Tags

NGSS.MS-PS1-6

NGSS.MS-PS3-4

Which form of energy is transferred when an ice cube at 0°C is placed in a beaker of water at 50°C?

• chemical

• electrical

• nuclear

• thermal

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5