Midterm Exam Science Grade 8

A _____________is a quantity that can be measured.

• physical quantity

• scalar quantity

• vector quantity

• chemical quantity

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Vector quantities have magnitude ONLY.

• True

• False

Scalar quantities have magnitude ONLY.

• True

• False

Which of the following events specify a vector quantity?

• The bottle can hold 500 ml of water.

• Town A is located 30 km north-west of Town B.

• Ken heats some water from 25°C to 100°C.

• The airplane is flying at 800 km/h.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

NGSS.MS-PS2-4

A ________________ can be used to represent a vector quantity.

• parallelogram

• scaled vector diagram

• curve

• line

A girl walks from X to Y and to Z and then back to Y. The length of XZ is 50 m and Y is the midpoint of XZ. What is the total distance that she walked?

• 0 m

• 25 m

• 50 m

• 75 m

A person ran from P to Q and R and then back to P as shown in Figure 1. What is the magnitude of the distance and displacement of the person?

• distance= 0 m , displacement= 0 m

• distance= 0 m, displacement= 120 m

• distance= 120 m, displacement= 0 m

• distance= 120 m, displacement= 120 m

A dog walks the path W-X-Y-Z-X in 1740 seconds. What is the magnitude of the average velocity of the dog?

• 0.23 m/s

• 0.35 m/s

• 1.01 m/s

• 1.45 m/s

A car traveled north for 60 km before heading back south for 40 km. If the whole journey took 2 hours, which of the following is correct?

• Magnitude of Average Speed= 30 km/h

• Magnitude of Average Velocity= 50 km/h

• Magnitude of Average Speed= 10 km/h

• Magnitude of Average Velocity= 10 km/h

A _____________force is a single force that can represent the combined effect of two or more forces in magnitude and direction.

• resultant

• mixed

• buoyant

• liquid pressure

Tags

NGSS.HS-PS2-1