STP

Sarah wants to know if the kind of water tadpoles live in affects how they move. She puts the tadpoles into three different tanks of water to investigate their speed. She collects the data shown in the table.

Which of the following parts of the investigation is Sarah testing?

• the kind of water

• the number of tanks

• the speed of the tadpoles

• the size of the tadpoles

Tags

NGSS.MS-LS2-1

What data is Sarah collecting?

• the kind of water

• the number of tanks

• the speed of the tadpoles

• the size of the tadpoles

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Emily determined the mass of a sealed can filled with crushed ice. The ice slowly melted in the can, and no water vapor escaped as it melted. After the ice melted, what is the best prediction about the mass of the can with water?

• The mass of the can filled with ice would have a greater mass than the can with water after the ice had melted.

• The mass of the can filled with ice would have a smaller mass than the can with water after the ice had melted.

• The mass of the can filled with ice would have the same mass as the can with water after the ice had melted.

• It is impossible to determine which can had more mass without more information about the ice and the can.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student has a pitcher of lemonade. The student claims that the pitcher of lemonade would weigh the same amount as the pitcher, water, and lemonade mix combined. The student plans an investigation to obtain evidence to support this claim. The chart shows the steps in the investigation.

Which steps in the investigation would provide evidence to support the claim?

• Steps 1 and 2

• Steps 2 and 4

• Steps 1 and 3

• Steps 2 and 3

Tags

NGSS.HS-PS1-7

Veronica weighed an empty bowl and recorded its mass. Then she placed three ice cubes in the bowl and weighed it again. After the ice melted, she recorded the mass of the bowl and the water. She put the data in a table. What conclusion should Veronica make from her observations?

• The masses of the water and the ice were both 43 grams, so the amount of matter did not change.

• The masses of the water and the ice were both 153 grams, so the amount of matter did not change.

• Some of the water spilled because the mass of liquid water should have been greater than the mass of solid ice.

• There was an error in weighing the ice because the mass of liquid water should have been less than the mass of solid ice.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student had three containers made from different materials. The student wanted to know which container would keep ice from melting the longest. He placed 50 g of ice in each container. He collected and recorded data on the amount of ice in the container every ten minutes for one hour. Use the data table to answer the questions.

Which order did the ice completely melt?

• metal, plastic, glass

• plastic, glass, metal

• metal, glass, plastic

• glass, plastic, metal

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What does STP stand for in the context of chemistry?

• Standard Temperature and Pressure

• Standard Time Protocol

• Scientific Temperature Parameter

• Standard Test Procedure

Tags

NGSS.HS-PS1-5

At STP, what is the volume occupied by one mole of an ideal gas?

• 22.4 liters

• 24.0 liters

• 20.0 liters

• 18.0 liters

Which of the following conditions define STP in chemistry?

• 0°C and 1 atm

• 25°C and 1 atm

• 0°C and 2 atm

• 25°C and 2 atm

Why is STP used in scientific experiments?

• To provide a standard reference for comparing gas volumes

• To measure the acidity of solutions

• To determine the boiling point of liquids

• To calculate the density of solids