8th grade Final Exam Review Part 1

Which of these waves CANNOT travel through the vacuum of space?

• radio wave

• sound wave

• light wave

• x-ray

When two or more substances combine, but each keeps its own properties, the new combination is called a(an)

• compound

• element

• mixture

• homogenous substance

Gamma rays have the shortest wavelength and the ______________ frequency.

• lowest

• highest

• random

• undetermined

Tags

NGSS.HS-PS4-1

When light enters a pair of glasses, it ______________ when it hits the glass.

• reflects

• diffracts

• refracts

• absorbs

Tags

NGSS.MS-PS4-2

An echo is when a sound wave __________.

• reflects

• refracts

• diffracts

• absorbs

Tags

NGSS.MS-PS4-2

Which state of matter has the LEAST kinetic energy?

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS3-1

Which is an example of electrical energy being converted or changed into light energy?

• glowstick

• the sun

• a solar panel

• a light bulb

How many protons, neutrons, and electrons does the element beryllium have? It has an atomic number of 4 and an atomic mass of 9.

• 4 protons, 4 electrons, 9 neutrons

• 4 protons, 9 electrons, 4 neutrons

• 4 protons, 5 electrons, 5 neutrons

• 4 protons, 4 electrons, 5 neutrons

Tags

NGSS.MS-PS1-1

Which is an example of a chemical reaction?

• water boiling

• ice melting

• lighting a match

• water vaporizing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which set of magnets correctly illustrates the repulsion of like poles?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3