CFA/ Quiz 2 (Unit 1)

Last updated over 2 years ago

4 questions

Note from the author:

Classifying matter and the effects of thermal energy

Instructions

A teacher slowly stirs 40 grams (g) of table salt (NaCl) into a 100 milliliter (mL) beaker of water (H2O). The beaker is heated on a hot plate until it boils.

Required

Library

CFA/ Quiz 2 (Unit 1)

Last updated over 2 years ago

4 questions

Note from the author:

Classifying matter and the effects of thermal energy

Instructions

A teacher slowly stirs 40 grams (g) of table salt (NaCl) into a 100 milliliter (mL) beaker of water (H2O). The beaker is heated on a hot plate until it boils.

Required

Question 1

What type of matter are the salt (NaCl) and the water (H2O)? (select all that apply: Limit 2 )

Pure Substances

Elements

Compounds

Homogeneous Mixtures

Heterogeneous

Required

Question 2

As the teacher stirs the Table salt (NaCl) into the beaker of water, the beaker is heated on a hot plate until it boils. Describe the change in the water molecules as thermal energy is added. (Write your explanation using complete sentences.)

Required

Question 3

Select the best answer that models the resulting liquid when salt is added to the water and stirred. (Select all that apply: Limit 2)

Homogeneous Mixture

Heterogeneous Mixture

Required

Question 4

The models below show different kinds of matter. Match each model to its corresponding identity.

Draggable item		Corresponding Item
		Mixture of Elements
		Elements
		Compounds
		Mixture of elements and compounds
		Mixture of compounds

Question 1

What type of matter are the salt (NaCl) and the water (H2O)? (select all that apply: Limit 2 )

Pure Substances

Elements

Compounds

Homogeneous Mixtures

Heterogeneous

Question 2

As the teacher stirs the Table salt (NaCl) into the beaker of water, the beaker is heated on a hot plate until it boils. Describe the change in the water molecules as thermal energy is added. (Write your explanation using complete sentences.)

Question 3

Select the best answer that models the resulting liquid when salt is added to the water and stirred. (Select all that apply: Limit 2)

Homogeneous Mixture

Heterogeneous Mixture

Question 4

The models below show different kinds of matter. Match each model to its corresponding identity.

Draggable item		Corresponding Item
		Mixture of Elements
		Elements
		Compounds
		Mixture of elements and compounds
		Mixture of compounds