Milestone Science

Which of the following best describes the velocity of an object?

• 30 m/s

• 30 m/s east

• 30 m/s²

• 30 m

What is the difference between the velocity and speed of an object?

• Velocity is the change in distance over time, while speed is the change in velocity over time.

• Velocity has a direction associated with it, while speed has no specific direction.

• Velocity is the change in speed over time, while speed is the change in distance over time.

• Velocity has no direction associated with it, while speed has a specific direction.

The most penetrating type of radiation is the _______.

• beta particle

• gamma ray

• uranium

• alpha particle

A gas-like mixture with no definite volume or shape that is made up of positively and negatively charged particles is a ____.

• gas

• plasma

• liquid

• solid

Most matter ____ when heated. 

• expands

• contracts

• condenses

• solidifies

Tags

NGSS.MS-PS1-4

As a sample of matter is heated, its particles ____.

• are unaffected

• Move more quickly

• stop moving

• move more slowly

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In this model, which particle determines the reactivity of this atom?

• Particle W

• Particle X

• Particle Y

• Particle Z

Tags

NGSS.MS-PS1-1

An element is?

• Chemically combined

• Pure substances that can be broken down

• Pure substances that cannot be broken down into simpler substances

• One or more elements chemically combined.

Which picture(s) represents a mixture between two elements?

• A

• B

• C

• A and C

Tags

NGSS.MS-PS1-1

At higher temperatures

• particles in an object have less energy

• particles in an object move faster

• a gas contracts

• the motion of particles does not change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4