Matter Classification & Properties

The image shows arrangements of types of matter. There are three different types of atoms that appear in the image, represented as Atom 1, Atom 2, and Atom 3. 

Which model - 1, 2, 3, or 4 - represents a compound?

• Model 1 (top left)

• Model 2 (top right)

• Model 3 (bottom left)

• Model 4 (bottom right)

Tags

NGSS.MS-PS1-1

A student is attempting to draw a model of the alloy brass, which is a homogeneous mixture of copper and zinc. Look at the four models in the picture.

Which model most likely represents brass, a homogeneous mixture?

• 1, because it has more than one type of atom, the atoms are not chemically bonded, and the substance is uniform throughout.

• 2, because it has more than one type of atom, the atoms are chemically bonded, and the substance is not uniform throughout.

• 3, because it has more than one type of atom, the atoms are not chemically bonded, and the substance is not uniform throughout.

• 4, because it has one type of atom, the atoms are chemically bonded, and the substance is uniform throughout.

Tags

NGSS.MS-PS1-1

Mary spills a glass of water. When she places a paper towel over the liquid, she notices that the water absorbs and spreads throughout the towel automatically.

Which statement describes why this happens?

• Weak cohesion between different water molecules causes the water to be pushed along the surface of the towel.

• Strong cohesion attracts the water to the paper towel and causes the water to move along the surface of the towel.

• Weak adhesion between different water molecules causes the water to be pushed along the surface of the towel.

• Surface tension causes water to move along the surface of the paper towel.

Chet is baking a cake. He pours the water into a measuring cup. He notices that water forms droplets and sticks to the side of the measuring cup.

Which statement best explains the properties of water in this scenario?  Select 2 correct responses.

• Water molecules stick to each other and form water droplets due to cohesion.

• The water droplets stick to the sides of the measuring cup due to cohesion.

• Water molecules stick to each other and to the measuring cup due to surface tension.

• • The water droplets stick to the sides of the measuring cup due to adhesion.

Azami’s mom loves drinking tomato juice but often complains about an upset stomach. Azami thinks it is because the tomato juice is too acidic. He suggests she add something to her tomato juice to help make it more neutral. The data table shows the pH of tomato juice, milk, and lemon juice.

What two substances does Azami recommend to his mom to drink to make it more neutral?

• More tomato juice

• Milk

• Lemon juice

• Water

Miguel notices that a clear substance dripped on green plant leaves causing the leaf to turn yellow. He tests the clear substance and litmus paper reveals it is a base.

What substance might this clear substance be?

• water

• hand soap

• vinegar

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemist is studying the element sulfur (S). She looks at the location of sulfur in the periodic table to determine its physical properties.

Which describes sulfur based on its location in the periodic table? Select 3 correct answers.

• Sulfur is a poor conductor of electricity.

• • Sulfur is a good conductor of electricity.

• • Sulfur has a bright luster.

• • Sulfur does not have luster.

• • Sulfur is a nonmetal.

Which of the following properties are properties of metals? Select two answers.

• • Brittle - easily shattered

• • Good conductor of electricity

• • Malleable

• Poor conductor of heat