AZSci Review

Which of the following is NOT a state of matter?

• Solid

• Liquid

• Plasma

• Gas

Answer explanation

The correct answer is Plasma, as it is not a state of matter typically mentioned alongside Solid, Liquid, and Gas. Plasma is a distinct state but was incorrectly identified as NOT being mentioned.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens during a chemical reaction?

• Substances disappear

• Substances combine and create something new

• Substances remain unchanged

• Substances separate into smaller parts

Answer explanation

During a chemical reaction, substances combine and create something new, forming different products. This is the essence of a chemical change, distinguishing it from physical changes where substances remain unchanged.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does the conservation of mass state?

• Mass is created during reactions

• Mass is lost during reactions

• Mass isn't lost or created, it just changes form

• Mass is doubled during reactions

Answer explanation

The conservation of mass states that mass isn't lost or created during chemical reactions; it simply changes form. This means the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-5

What is Newton's third law?

• Objects stay still unless acted on

• More force equals more movement

• For every action, there's an opposite reaction

• Mass is conserved

Answer explanation

Newton's third law states that for every action, there's an opposite reaction. This means that forces always occur in pairs; when one object exerts a force on another, the second object exerts an equal and opposite force back.

Tags

NGSS.MS-PS2-1

What do waves carry?

• Mass

• Energy

• Force

• Matter

Answer explanation

Waves primarily carry energy, not mass, force, or matter. This is evident in various phenomena, such as sound waves and light waves, where energy is transmitted through the medium without transporting the medium itself.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What is the bottom part of a wave called?

• Crest

• Trough

• Wavelength

• Amplitude

Answer explanation

The bottom part of a wave is called the trough. It is the lowest point, while the crest is the highest point. Wavelength refers to the distance between two crests or troughs, and amplitude measures the height of the wave.

What is the distance between wave crests called?

• Crest

• Trough

• Wavelength

• Amplitude

Answer explanation

The distance between wave crests is called the wavelength. It measures the length of one complete wave cycle, distinguishing it from other terms like amplitude, which refers to wave height.

What does light need to travel?

• Nothing

• Air

• Water

• Solid objects

Answer explanation

Light does not require a medium to travel; it can move through a vacuum. Therefore, the correct answer is 'Nothing', as light can propagate without needing air, water, or solid objects.

Tags

NGSS.MS-PS4-2

What does sound need to travel?

• Nothing

• Air

• Light

• Solid objects

Answer explanation

Sound needs a medium to travel, and air is the most common one. It can also travel through liquids and solids, but it cannot travel through a vacuum. Therefore, the correct answer is air.

Tags

NGSS.MS-PS4-2

What is an example of a chemical reaction?

• Water freezing

• Baking soda and vinegar fizzing

• Ice melting

• Salt dissolving in water

Answer explanation

The correct choice, baking soda and vinegar fizzing, is a chemical reaction where new substances are formed, unlike the other options which are physical changes or states of matter.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5