Explore chemical structure and properties: soapmaking

Explore chemical structure and properties: soapmaking

Assessment

Passage

Created by

Explore Teacher

Science

7th Grade

Hard

NGSS
MS-PS1-2, MS-PS1-4, MS-PS1-5

+1

14 questions

Show all answers

1.

MULTIPLE SELECT

45 sec • 1 pt

Which of the following statements are true? Select all that apply.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

2.

MULTIPLE SELECT

45 sec • 1 pt

Which of the following statements are true? Select all that apply.

Tags

NGSS.MS-PS1-4

3.

MULTIPLE SELECT

45 sec • 1 pt

Another characteristic property of a substance is its solubility in water. A substance's water solubility describes how well the substance will dissolve in water at a given temperature. Like other characteristic properties, water solubility is determined by a substance's chemical structure.

Some substances, such as sugar and table salt, have chemical structures that make them highly soluble in water. Other substances, such as dirt and oil, have chemical structures that make them insoluble, or poorly soluble, in water.

Complete the sentence using the options below in the correct order!

Coconut oil is __________ in water so coconut oil ______________ in water.

4.

MULTIPLE CHOICE

30 sec • 1 pt

Media Image

The following passage describes how Sam makes soap from coconut oil. Select the part of the passage that describes the chemical change that occurs during saponification.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5.

MULTIPLE CHOICE

30 sec • 1 pt

Complete the sentence.

At 82°F the coconut oil soap is a __________.

Tags

NGSS.MS-PS1-4

6.

MULTIPLE CHOICE

30 sec • 1 pt

Complete the sentence.

The melting point of coconut soap is ____________ than the melting point of coconut oil.

7.

MULTIPLE CHOICE

30 sec • 1 pt

Complete the sentence.

The attractions between molecules of coconut oil soap must be ___________ than attractions between molecules of coconut oil.

8.

MULTIPLE CHOICE

30 sec • 1 pt

The density of coconut oil is 0.9 grams per milliliter, and the density of coconut oil soap is 1.1 grams per cubic centimeter. Even though the densities of coconut oil soap and coconut oil have different units, they can be compared directly. This is because a cubic centimeter and a milliliter have the same volume. So, a solid with a density of 1 gram per cubic centimeter and a liquid with a density of 1 gram per milliliter are equally dense.

Which substance is more dense?

9.

MULTIPLE SELECT

45 sec • 1 pt

Media Image

Read the passage and then answer the question below.

Sam washes her hands with coconut oil soap and running water. As the water dissolves the soap, a lather forms and the soap bar gets smaller.

Which 2 words or statements complete the sentence?

Coconut oil soap ___________ in water. So coconut oil soap is __________.

Tags

NGSS.MS-PS1-2

10.

MULTIPLE CHOICE

30 sec • 1 pt

Why is soap good at cleaning?

Choose the best answer. Make sure you read the passage before attempting to answer this question!

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