A group of students is given four small cubes of the same size and instructed to place them in a beaker of water. One cube floats to the surface of the water. Two of the cubes float in the middle of the beaker under the surface of the water. The last cube sinks to the bottom of the beaker.  Which conclusion is best supported by what the students observed?

• Two of the four cubes are soluble in water. 

• All four cubes have different masses. 

• Each cube is made of a different type of solid material. 

• One of the cubes is more dense than the other three. 

Which of these is the best conductor of electricity?

• Glass rod

• Cotton string

• Plastic tubing

• Copper penny

Scientists use the physical properties of matter to classify matter. Select the items (2) pictured that are magnetic and denser than water.

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Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-5

A group of students made a table describing the physical properties of four different objects. Which object is MOST LIKELY salt? Select the correct answer.

Which conclusion can be made about the samples based on the table?

• Sample 1 is made of plastic.

• Sample 2 is made of metal. 

• Sample 3 is attracted to magnets.  

• Sample 4 is less dense than water.

A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating?

• Solubility

• Density

• Conductivity

• Mass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

This question has two parts. First, answer Part A. Then answer Part B.

Mrs. Zelnik heated a beaker on a hot plate during a demonstration in her science class. She used protective gloves to grab the beaker filled with boiling water.

Part A- Why does Mrs. Zelnick need to use protective gloves to grab the beaker?

• The beaker creates electrical conductivity.

• The beaker stops thermal energy so heat cools down the glass.

• Due to the he beaker insulating thermal energy it gets hot.

• The beaker conducts thermal energy so it is cold.

Part B

Which statement supports the answer to Part A?

• The protective gloves make the beaker feel colder.

• The protective gloves insulate heat to protect her hands.

• The protective gloves conduct heat to protect her hands.

• The protective gloves do not have any effect on her hands.

Tags

NGSS.MS-PS3-3

Klein and LaShaun were investigating the physical properties of some substances. They grouped the substances and put them in a table. They need to complete the table with column headings . Which column headings should Klein and Lashaun use for their table?

a

c

b

Good Insulators of heat.

Soluble in water.

Same Physical State.

A student was helping his father prepare soup for dinner. His father asked him to use a wooden spoon to stir the soup as it heated. Why would the student's father ask him to use a wooden spoon? 

• The wooden spoon is able to float in the soup.

• The wooden spoon is able to sink in the soup.

• The wooden spoon is a good conductor of thermal energy.

• The wooden spoon is a good insulator of thermal energy.