7.6

Which 2 elements make up the chemical compound NaCl also known as table salt?

• Sodium and Chlorine

• Sodium and Carbon

• Sodium and Nitrogen

• Sodium and Oxygen

Tags

NGSS.MS-PS1-1

Using the periodic table, which elements are present in the formula CaCO₃?

• carbon and cobalt

• calcium and cobalt

• calcium, carbon, and oxygen

• carbon, actinium, and oxygen

Tags

NGSS.MS-PS1-1

Shelby sorted different types of changes into the categories of chemical change and physical change. Which phrase describes a chemical change?

• boiling a pot of water

• tearing paper into small pieces

• fruit rotting and giving off a smell

• sugar crystalizing out of solution as water evaporates

Tags

NGSS.MS-PS1-2

Compare and contrast the substances shown in terms of their atoms and structures. Which substance is a molecule but NOT a compound?

• water

• oxygen

• glucose

• silver

Tags

NGSS.MS-PS1-1

List the steps of the scientific method

d

e

f

c

b

a

Form a hypothesis

Conduct experiment

Communicate results

Draw conclusions

Ask a question

Analyze results

Look at this ball-and-stick model of carbon dioxide. Which is a limitation of using this model to describe the molecule of carbon dioxide?

• The model makes it hard to see what carbon dioxide is made of.

• The model makes it difficult to see how many atoms are in carbon dioxide.

• The model makes it difficult to see the chemical formula of carbon dioxide.

• The model makes it hard to see what carbon dioxide looks like in interactions.

Tags

NGSS.MS-PS1-1

Samantha learned that honey is a saturated solution of glucose and fructose dissolved in water. Which describe solute(s) and solvent(s) in the honey solution?

• Fructose is the solvent and water is the solute.

• Water is the solvent and glucose is the only solute.

• Water is the solvent and glucose and fructose are the solutes.

• Fructose is the solvent and water and glucose are the solutes.

Using the diagrams as models, how can your answer choice in the previous question be explained?

• The substance has chemical bonds between atoms and only one type of atom.

• The substance has no chemical bonds between atoms and only one type of atom.

• The substance has chemical bonds between atoms and more than one type of atom.

• The substance has no chemical bonds between atoms and more than one type of atom.

Tags

NGSS.MS-PS1-1

Physical and chemical changes can be identified based on various observations of changes in objects. Which observation can be done to a piece of paper and be considered a physical change.

• cut in half

• soaked in water

• painted from white to red

• set on fire and burned

Physical and chemical changes can be identified based on various observations of changes in objects. Which observation can be done to a piece of paper and be considered a chemical change?

• painted from red to white

• interacts with acid and turns yellow

• set on fire and burned

• soaked in water

Tags

NGSS.MS-PS1-2