B

A group of students were investigating how changing the steepness of an incline could affect the speed that a marble would travel through a tube. Using the information on the image, what was the marble's speed?

• 0.5 m/s

• 0.7 m/s

• 1.0 m/s

• 1.4 m/s

Tags

7.7A

Two identical balls are dropped at the exact same time. One ball is released so that it can drop straight down; it has a horizontal velocity of 0 m/s. The other ball is thrown horizontally and has an initial horizontal velocity of 10 m/s. Assume no air resistance. Select the statements that correctly describe the movement of the balls.

• The first ball will hit the ground before the second ball.

• The forces acting on both balls are balanced.

• The balls will hit the ground at the same time.

• The forces acting on the first ball are balanced, but the forces acting on the second ball are unbalanced.

• The only force acting on the balls is the force of gravity, pulling them downward.

Tags

7.7B

The workout times of three swimmers were recorded below. Which swimmer had the workout represented by the graph?

• Swimmer 1

• Swimmer 2

• Swimmer 3

• None of the above

Tags

7.7C

The graph shows the distance three BMX bikes traveled over time. Use the descriptions of the bike's motion to match them to the correct biker.

• took 10 minutes to travel 10 miles

• Biker 3

• stopped for minutes

• Biker 2

• moved at a constant speed

• Biker 1

Tags

7.7C

A person pushes a box with an unknown force and it begins to move. If the force of friction is 2N, what can you infer about the force applied by the person?

• The force applied is greater than 2N.

• The force applied is less than 2N.

• More information is needed to make an inference about the force applied.

Tags

7.7D

A family on vacation headed out in their car to do some sight-seeing. During what time interval did they travel the fastest?

• 8-10 am

• 11 am - 2 pm

• 2-3 pm

• 3-5 pm

Tags

7.7C

The graph shows the speed of a car over time. On the graph, which letters indicate times when the forces on the car were balanced?

• A, B, C

• B, E, G

• C, D, G

• A, D, F

• B, D, H

Tags

7.7D & 7.7C

Which of the following statements about the element Boron (B) is true?

• Boron is a metal.

• Boron is a non-metal.

• Boron is a metalloid.

• Boron is a noble gas.

What is the atomic number of Boron (B)?

• 3

• 4

• 5

• 6

Boron (B) is essential for the growth of which of the following?

• Animals

• Plants

• Fungi

• Bacteria

Tags

NGSS.MS-LS1-5