Case 21 (Fall 24/25) Part 1

A student performs an experiment using water and sugar cubes. The chart lists the steps in the experiment. 1. Fill two containers with 100 milliliters of room temperature water. 2. Add one 10-gram sugar cube to each container. 3. Stir the contents of one container. 4. Record the time it takes for each sugar cube to dissolve. Which question is being tested?

• Does stirring affect the amount of time it takes a sugar cube to dissolve in water?

• Does the temperature of the water affect the amount of time it takes a sugar cube to dissolve in water?

• Does the size of the sugar cube affect the amount of time it takes a sugar cube to dissolve in water?

• Does the amount of water affect the amount of time it takes a sugar cube to dissolve in water?

Two objects are held at the same height above the ground. Object 1 has a greater mass than Object 2. Which sentence explains the gravitational force acting on the two objects?

• Object 1 experiences less gravitational force than Object 2.

• Object 2 experiences less gravitational force than Object 1.

• Both objects experience the same amount of gravitational force.

• Neither object experiences gravitational force.

Tags

NGSS.MS-PS2-4

A student places a metal cup filled with 100 milliliters of water in sunlight. After 5 hours in the sunlight, the volume of the water is 77 milliliters. What causes the change in volume?

• The water increases in volume when it is heated.

• The water moves in the cup when it is heated.

• The water changes to a solid when it is heated.

• The water evaporates when it is heated.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagram shows four space objects (A-D) that are the same distance from a star. The table lists the mass of each space object. Which sentence correctly describes the gravity between the star and a space object?

• The largest gravitational force is between the star and Space Object A.

• The largest gravitational force is between the star and Space Object B.

• The least gravitational force is between the star and Space Object C.

• The least gravitational force is between the star and Space Object D.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Students are preparing to test different amounts of force on toy cars. They draw pictures of their plans with five toy cars (A-E). The arrows show the strength and direction of force that will be used on the cars. Which cars will have balanced forces applied to them?

• cars A and C

• cars B and D

• cars C and E

• cars D and E

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which two cars will move to the right when the forces are applied?

• car A

• car B

• car C

• car D

• car E

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A basketball coach makes a sports drink from a powder drink mix for the basketball players. The table lists the ingredients used to make the sports drink. Ingredients: powder drink mix (2 kg), water (22 kg), ice (1 kg). What is the weight of the sports drink made by the coach?

• 2 kilograms

• 19 kilograms

• 25 kilograms

• 30 kilograms

The table contains the properties of two materials before they are mixed and the properties of the mixture.

Which statement is true?

• The mixture has different properties even though a new material was not formed.

• A new material formed with very different properties compared to the original materials.

• The mixture contains new materials with the same properties.

• A new material was not formed when the original materials were mixed.

Tags

NGSS.MS-PS1-2

A teacher uses a beach ball as the Sun and two oranges of equal mass as space objects. The oranges are placed different distances from the beach ball. Which sentence correctly states the amount of the Sun’s gravity each space object will experience?

• Both space objects have the same mass, so they will experience the same amount of gravity.

• Both space objects are in space, so they will experience the same amount of gravity.

• Space object 1 is closer to the Sun, so it will experience a larger amount of gravity than space object 2.

• Space object 2 is farther from the Sun, so it will experience a larger amount of gravity than space object 1.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What was the mass of the sugar solution in the beaker made by Student 1?

• 25 grams

• 75 grams

• 100 grams

• 125 grams

Tags

NGSS.MS-PS1-2