1.9 Review Properties of Matter

Ava put a crayon into an empty graduated cylinder and said the crayon's volume is 35 milliliters (35 cubic centimeters).

How can you check if Ava's claim is correct?

• Believe Ava's claim without checking.

• Add water to the cylinder, then see how much the water level rises when the crayon is added to measure its volume.

• Measure the crayon's size and use that to find its volume.

• Compare the crayon to another object that has a volume of 35 milliliters.

Answer explanation

To check if the student’s claim is correct, pour water into the cylinder and see how much the water level goes up when you put the crayon in. This will show you the crayon’s volume by measuring how much water it pushes out of the way.

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Match the following

Groups:

(a) Float

,

(b) Sink

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Match the following

Groups:

(a) Low Relative Density

,

(b) High Relative Density

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• 

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Benjamin and Emma noticed that ocean water is often called saltwater because the water has salt dissolved in it. Sand on the beach does not dissolve in water. Salt and sand have the same (a)   .

• physical state.

• solubility

Answer explanation

Salt and sand both have the same physical state, which is solid. While salt dissolves in water, sand does not, but both are solids in their natural form.

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Aiden and Maya are making a salad dressing with lemon juice, vinegar, oil,

and other ingredients. The lemon juice and vinegar

combine and stay mixed. The oil does not dissolve and

forms a layer on top of the juice and vinegar.

The lemon juice and oil have the same (a)  

• solubility

• physical state

Answer explanation

The lemon juice and oil have the same physical state, as both are liquids. However, they do not mix due to differences in their properties, while lemon juice and vinegar mix well because they are both polar substances.

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Samuel, Avery, and Kai tested a light bulb with three different metals, and it lit up each time. All teams got the same result.

Which of the following is the best claim?

• The groups did not do the investigation correctly.

• The metals are conductors of electrical energy.

• The metals are not conductors of electrical energy.

• Plastic is not a conductor of electrical energy.

Answer explanation

The evidence shows that the light bulb lit up with three different metals, indicating that these metals can conduct electrical energy. Therefore, the best claim is that the metals are conductors of electrical energy.

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Match the following.

• solids

• salt and sand

• soluble

• lemon juice and oil

• liquids

• sand and oil

• not soluble

• salt and lemon juice

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Sophia and Arjun are learning about different materials in their science class. Plastic and wooden tools​ ​ (a)  

magnetic.Tools like the metal spoon and spatula ​ (b)   ​

magnetic.

• are not

• are

Answer explanation

Plastic and wooden tools are not magnetic, unlike metal utensils such as spoons and spatulas, which are magnetic. Therefore, the correct choices are 'are not' for plastic and wooden tools, and 'are' for metal utensils.

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Organize these options into the right categories.

Groups:

(a) Good Conductors of Thermal Energy

,

(b) Good Insuators of Thermal Energy

• wooden spoon

• metal whisk

• metal spoon

• plastic spatula

• plastic spoon

During a science experiment, Henry and Ava measured the amount of space that a liquid occupies in a container. What is the term for this measurement?

• Mass

• Volume

• Density

• Weight

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