Category 1 Science

The temperature at which a substance changes from liquid to gas (for water this is 100 degrees Celsius, 212 degrees Fahrenheit)

• boiling point

• melting point

• evaporation

• condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A mixture of beads was placed in a container, as shown below. The beads are of various sizes, and each one is made of plastic, glass or steel. The mixture would be easy to separate because all the beads....

• are less dense than water

• are solids

• have the same mass

• are attracted to magnets

Students prepare a solution of instant tea and place 30 mL of the solution in a Petri dish. Which answer choice best explains what happens to the solution when it is placed in a dry, warm location for 3 days?

• The solution will evaporate and the Petri dish will be empty.

• The solution will not change.

• The water will  evaporate and the instant tea will remain in the Petri dish.

• The water will condensate and the instant tea will remain in the Petri dish.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

How would you separate a mixture of sand and salt? 

• Mix them with water and let the water evaporate

• Mix them with water, pour the mixture through a sieve, then let the water evaporate

• Heat the sand and salt mixture for 5 minutes, then let it cool

• I would not do any of these because none of these options would work

A student observed liquid wax dripping down the side of a burning candle. After putting out the candle’s flame, the student left the room. Several hours later the student observed that there was no longer any liquid on the side of the candle. Which statement explains what most likely happened to the liquid wax?

• The heat given off by the flame caused the candle wax to evaporate.

• The liquid wax changed back into a solid as it cooled.

• The liquid wax condensed and was absorbed by the candle.

• None of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Liquid water can be changed to a gas by which of the following?

• freezing 

• boiling

• melting       

Tags

NGSS.MS-PS1-4

The diagram shows a view of a ball from above a table. The ball is rolling across the table. A student lightly taps the rolling ball in the direction shown in the picture. In which direction does the ball most likely move after the student taps the ball? (3.6B)

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Four students stand facing a box. The diagram below shows an overhead view of the box. The numbered circles represent the positions of the students. What do the students need to do to slide the box to the northeast? (3.6B)

• Students 1 and 2 push, and Students 3 and 4 pull.

• Students 1 and 4 push, and Students 2 and 3 pull.

• Students 2 and 3 push, and Students 1 and 4 pull.

• Students 3 and 4 push, and Students 1 and 2 pull.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Two students are playing on a swing set. Student 1 is leaning back and extending her legs as she moves upward. Student 2 is sitting on the swing with his feet on the ground. Which statement describes how position and work are related in this picture? (3.6B)

• Both students are doing work even if only one student is changing position.

• Student 1 is changing position because work is being done on the swing.

• Work done by Earth's gravity prevents Student 2 from changing position.

• Work is being done on both students by the swings because one swing is changing position.

Tags

NGSS.MS-PS2-4

What is the process by which plants make their own food using sunlight?

• Photosynthesis

• Respiration

• Transpiration

• Fermentation

Tags

NGSS.MS-LS1-6