Which tool can be used to compare the mass of a large rock to the mass of two wooden blocks?

• Graduated cylinder

• Thermometer

• Spring scale

• Pan balance

Why would the student shake the salad dressing well before using it? Select TWO correct answers.

• Vinegar and oil have different densities.

• Oil and vinegar have the same density.

• Vinegar and oil both contain water.

• Vinegar and oil are both liquids.

• Oil and water have different densities.

A hand lens refracts light. When light rays shine on the lens, most of the light rays —

• disappear

• bend

• will bounce

• are blocked

Tags

NGSS.MS-PS4-2

A student drew this model to show what happens when sugar dissolves in water. Black circles represent particles of sugar. White circles represent particles of water. What change would make the model more accurate?

• Show the black circles and white circles evenly mixed.

• Remove all the white circles.

• Move all the black circles to the bottom row.

• Show the black circles clumped together in the middle.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

For a science experiment, a class used a penny, vinegar, and water. They made and recorded several observations. If the students made a second round of observations on Day 2, which one would least likely change from Day 1?

• Mass of penny

• Temperature of lab water

• Room temperature of vinegar

• Volume of vinegar

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Look at the picture. A student sets up an investigation to see how the number of books affects how far the car rolls after going down the ramp. When the toy car is released, it rolls down the ramp. Which force is responsible for causing the car to roll down the ramp?

• Friction

• Magnetism

• Gravity

• Contact force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Students test the effects of forces that act from a distance, causing objects to move. They discover that two forces have this effect on objects. These forces are –

• friction and gravity

• gravity and magnetism

• magnetism and friction

• gravity and density

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-4

NGSS.MS-PS2-5

This student has built a periscope using a tube and two mirrors. This periscope works because of —

• reflection only

• refraction only

• neither reflection nor refraction

• a combination of reflection and refraction

Tags

NGSS.MS-PS4-2

A lab investigation called for the following items to be mixed together. Which ingredients in the image will dissolve in water? Select TWO correct answers.

• Lemon Peel

• Mint

• Lemon Juice

• Sugar

Tags

NGSS.MS-PS1-2

Eric stirs two tablespoons of sugar with one cup of warm water in a glass until the sugar is no longer visible. He calls the resulting liquid Substance J. Next, he stirs together two tablespoons of sugar with two tablespoons of cinnamon until thoroughly mixed. He calls this substance, Substance K. Which describes how Substance J differs from Substance K?

• One is a solution, and the other is a mixture.

• One is a mixture, and the other is a compound.

• One is an element, and the other is a solution.

• One is a compound, and the other is an element.