Full Review (1st Semester)

Scientists believe that the universe is expanding because of a phenomena known as —

• black holes

• red shift

• blue shift

• radioactivity

Tags

NGSS.HS-ESS1-2

This model shows the composition and arrangement of atoms of a material in a beaker. What is the correct classification of the material shown in this model?

• compound

• element

• homogeneous mixture

• heterogeneous mixture

Tags

NGSS.MS-PS1-1

A student makes a model of the Milky Way. The student’s model shows an elliptical galaxy with an X in the center. The student explains that the X marks the location of Earth’s solar system within the Milky Way. Is the student’s model correct AND why?

• The student’s model is correct. It does not need to be changed.

• The student’s model is incorrect. It should show a spiral galaxy with the X on a spiral arm

• The student’s model is incorrect. It should show a spiral galaxy with the X in the center of the nuclear bulge.

• The student’s model shows the correct galaxy type, but the X should be moved closer to the edge of the galaxy.

Tags

NGSS.MS-ESS1-2

Wavelength, frequency, and amplitude are three measures that describe a wave. How are the wavelength and the frequency of a wave related to one another?

• As wavelength increases, frequency decreases.

• As wavelength increases, frequency increases.

• Wavelength is the frequency divided by the amplitude.

• Wavelength is the frequency multiplied by the amplitude.

Which statement describes the next stage in the life cycle of the Sun?

• The Sun will become a protostar.

• The Sun will evolve into a red giant.

• The Sun will explode in a supernova.

• The Sun will evolve into a red supergiant.

A 1.5 kg metal block is pushed with a net force of 3.0 N. What is the acceleration of the block?

• 0.50 m/s²

• 2.00 m/s²

• 3.33 m/s²

• 4.50 m/s²

Tags

NGSS.MS-PS2-2

Droplets of water remain on the lower side of this leaf, even though gravity pulls the water downward. What keeps the drops of water from falling to the ground?

• adhesion among water molecules in the droplet

• adhesion between water molecules and molecules of the leaf

• cohesion between water molecules and molecules of the leaf

• surface tension of the water droplet

A student used a pH meter to find the pH of some common household materials and recorded the observations in a table. How many of the common household materials listed are acids?

• two

• three

• four

• five

Tags

NGSS.MS-PS1-2

Pure water has a pH value equal to 7. What will happen to a sample of water if an acid is mixed with it?

• The water will become acidic, and its pH will decrease.

• The water will become basic, and its pH will decrease.

• The water will become acidic, and its pH will increase.

• The water will remain neutral, but its pH will decrease.

The chemical equation for photosynthesis shows that the products are sugar and oxygen gas. What atoms make up the sugar that is a product of this reaction, and which classification of matter is it?

• 6 carbon, 12 helium, 6 oxygen; sugar is an element

• 6 carbon, 12 hydrogen, 18 oxygen; sugar is a mixture

• 6 carbon, 12 hydrogen, 6 oxygen; sugar is a compound

• 6 carbon, 12 oxygen, 6 water; sugar is a mixture

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

NGSS.MS-PS1-1