Final Exam Diagnostic Quiz PS

Nature of Science: Which of the following best describes the difference between an observation and an inference?

• Observations are always true; inferences might be false.

• Observations are what you detect with your senses; inferences are interpretations of observations.

• Observations require instruments; inferences can be made without tools.

• Observations are made in labs; inferences are made in the field.

Motion: A car travels at a constant speed of 60 km/h for 30 minutes, then at 80 km/h for another 30 minutes. What is the car's average speed for the entire trip?

• 70 km/h

• 68.6 km/h

• 140 km/h

• 60 km/h

Forces: A 5 kg object is acted upon by a net force of 15 N. What is the object's acceleration?

• 3 m/s²

• 0.33 m/s²

• 75 m/s²

• 20 m/s²

Tags

NGSS.MS-PS2-2

Work & Energy: A 2 kg object is lifted 5 meters off the ground. How much gravitational potential energy does it gain? (g = 9.8 m/s²)

• 10 J

• 49 J

• 98 J

• 7.8 J

Heat & Temperature: Which statement correctly describes heat and temperature?

• Heat and temperature are the same physical quantity.

• Heat is the total thermal energy of a system; temperature is the average kinetic energy of its particles.

• Temperature is the total thermal energy of a system; heat is the average kinetic energy of its particles.

• Heat is measured in degrees; temperature is measured in joules.

Waves: Which type of wave requires a medium to travel through?

• Radio waves

• Light waves

• Sound waves

• X-rays

Atoms & Matter: Which subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Photon

Periodic Table: Elements in the same column (group) of the periodic table have similar:

• Atomic mass

• Number of neutrons

• Chemical properties

• Nuclear stability

Chemical Reactions: In the chemical equation 2H₂ + O₂ → 2H₂O, what does the coefficient '2' before H₂O indicate?

• Two hydrogen atoms are needed

• Two water molecules are produced

• Two oxygen molecules are required

• Water has two hydrogen atoms per molecule

Tags

NGSS.MS-PS1-5

Forces & Motion: An object is moving at a constant velocity. Which statement is true?

• The object must have a non-zero acceleration.

• The net force on the object is zero.

• The object must eventually slow down.

• The object cannot change direction.

Tags

NGSS.MS-PS2-2