Physical Science Final

Sound is caused by ____________________.

• radio waves

• electromagnetic waves

• stationary objects

• vibrations

___________________ occurs when an object causes a wave to change direction and bend around it. (example: Ocean waves going around a reef.)

• refraction

• reflection

• diffraction

• bouncing

Waves in which the particles of the medium move back and forth at right angles to the direction the wave is traveling are __________ waves.

• sound

• compressional

• transverse

• shock

The size of the gravitational force between two objects depends on their ____.

• speed and direction

• masses and distance between

• frictional forces

• inertia

Tags

NGSS.MS-PS2-4

How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?

• 8

• 6

• 2

• 4

Matter with no definite volume and no definite shape is a ____.

• liquid

• solid

• gas

• plasma

Tags

NGSS.MS-PS1-4

Which of the following is the equation for Newton’s second law of motion?

• Force = mass / acceleration

• Work = force X distance

• Power = work / time

• force = mass X acceleration

Tags

NGSS.MS-PS2-2

According to Newton’s 1st law, a moving object that is not acted on by an unbalanced force will

• eventually come to a stop.

• accelerate.

• remain in motion.

• change its momentum.

On a distance vs time graph a curve tells us?

• change in speed

• constant direction

• constant speed

• constant displacement

Which one is NOT a part of Newton's 1st Law?

• An object in motion remain in motion.

• An object at rest will remain at rest.

• An unbalanced force will change an objects motion.

• An object will never stop not matter what