Worksheets8th Grade MIDTERM REVIEW
Total questions: 92
Worksheet time: 3600secs
Which of the following would be found only in the Compounds side of the Venn diagram shown above?
A. II, III
B. III, IV
C. I, VI
D. IV, V
Which property of water best describes the tendency of water molecules to attract to surfaces, such as the inside of a beaker?
A) Adhesion
B) Cohesion
C) Diffusion
D) Transpiration
The strength of an acid and base is indicated by the pH value. How does the pH of an acid compare to the pH of a base, and how does the pH value indicate strength?
A) Acids have a lower pH than bases; lower pH indicates stronger acid.
B) Acids have a higher pH than bases; higher pH indicates stronger acid.
C) Acids and bases have the same pH; pH does not indicate strength.
D) Acids have a lower pH than bases; higher pH indicates stronger acid.
Which of the following best describes how acids differ from bases? Select TWO correct answers.
A) Acids have a sour taste, while bases have a bitter taste.
B) Acids turn blue litmus paper red, while bases turn red litmus paper blue.
C) Acids feel slippery, while bases feel rough.
D) Acids have a pH greater than 7, while bases have a pH less than 7.
How many sodium atoms are produced in one sodium oxide molecule?
A) One
B) Two
C) Three
D) Four
The chemical equation H₂ + O₂ → H₂O₂ demonstrates that —
matter cannot be created or destroyed by a chemical reaction
the reactants are the same substances as the products
the number of molecules in the reactants is equal to the number of molecules in the products
the atoms on the reactants side are changed into different atoms on the products side
Which of the following descriptions best demonstrates the law of conservation of mass?
A closed system where the mass of reactants equals the mass of products.
An open system where mass is lost to the surroundings.
A system where mass is created during a chemical reaction.
A system where mass is destroyed during a chemical reaction.
How can a student determine that a chemical reaction demonstrates the law of conservation of mass?
Students can compare the products and reactants to determine if the same molecules are present before and after the reaction.
Students can compare the mass of the products and reactants to determine if the mass is the same before and after the reaction.
Students can compare the products and reactants to determine if the same number of molecules are present before and after the reaction.
Students can compare the products and reactants to determine if the same elements are present before and after the reaction.
Hydrogen decomposes quickly when exposed to light. The reaction for decomposing hydrogen peroxide is: 2H₂O₂ → 2H₂O + O₂ What is the mass of H₂O in the reaction above?
66.99 g
24.11 g
21.44 g
48.22 g
A 2000 kg truck and a 500 kg car are racing. The same amount of force is applied to each of them. Which statement below best describes the acceleration of the vehicles?
The truck will accelerate twice as fast.
The car will accelerate four times as fast.
The car will accelerate twice as fast.
The truck will accelerate four times as fast.
It takes a 7 N force to cause a 0.028 kg object to begin moving. What is the acceleration of the object as it begins to move?
250 m/s²
0.25 m/s²
25 m/s²
2.5 m/s²
A rocket booster initially applies 10,000 N of force to a 1,000.0 kg rocket causing it to accelerate at 10.0 m/s². Ten minutes later, the rocket booster is released and it falls through the atmosphere. The mass of the rocket is now 760.0 kg and its acceleration is 7.0 m/s². How much force is now being applied to the rocket?
5,320 N
7,600 N
5,000 N
7,000 N
A roller coaster containing three cars is accelerating at 10 m/s² before it comes to an abrupt stop at the end of the ride. The mass of one car is 300 kg. How much force was exerted on the roller coaster to bring it to a stop?
30 N
900 N
3000 N
9000 N
A force that will work against motion in every situation is —
the normal force
weight
gravity
friction
During a tug-of-war competition, neither team is able to gain an advantage. Which of the following explains the forces in this situation?
The forces are balanced.
The forces are overcome by air friction.
The mass of the rope cancels the forces being exerted on it.
The forces are unbalanced.
How does increasing the amplitude of a wave affect the frequency AND wavelength of the wave?
Increases both frequency and wavelength.
Decreases both frequency and wavelength.
Increases frequency but not wavelength.
Does not affect frequency or wavelength.
In the electromagnetic spectrum, amplitude, wavelength, and frequency play an important role in the behavior of electromagnetic waves. Which of the following statements best describes the relationship between amplitude, wavelength, and frequency?
Wavelength is directly proportional to the wave's frequency, while amplitude affects the amount of energy delivered by the wave.
Wavelength is inversely proportional to the wave's frequency, while amplitude affects the amount of energy delivered by the wave.
Amplitude and wavelength are directly related to each other while frequency determines the type of radiation produced.
Wavelength determines the type of radiation in the electromagnetic spectrum, while amplitude and frequency determine the energy or intensity of the radiation.
Quasars are extremely distant celestial bodies. Investigators using a special telescope determined that a certain quasar was emitting waves with a frequency of 1.41×10^9 Hz. An electromagnetic spectrum is shown. What type of wave did the investigators most likely detect using a telescope?
Radio waves
Infrared waves
Visible light
Ultraviolet waves
The temperature of a star determines the wavelength of visible light that is produced. The visible part of the electromagnetic spectrum is shown. Stars with the highest temperatures will emit most of their light at wavelengths that are near —
Red light
Orange light
Green light
Blue light
Miguel had some misconceptions about waves and frequency. Which of the statements from his notes are correct?
Only 1, 2 and 4
Only 1, 2, 3, and 5
Only 3 and 4
Only 3 and 5
How do fossil records support the theory of plate tectonics?
Similar fossils are found on the same continent at different time periods.
Similar fossils are found on various modern continents.
Different fossils are found on the same continent during the same time period.
Fossils found along coastal regions of modern continents are unique.
Scientists have found some of the same types of rock containing the same types of fossil species in Africa and Antarctica. Which explanation does this information support?
Both continents gradually increased in size over time.
Both continents were attached by glacial ice millions of years ago.
Both continents were attached but drifted away from each other over time.
Both continents were underwater millions of years ago.
Eighth graders have been studying about the theory of plate tectonics. Of the following statements, which ones would be the BEST conclusion to the lesson?
There are small amounts of movement at the plates' edges.
There is no geologic activity located at the plates' edges.
Geologic activity causes stress to build and storage of energy at the edges.
Geologic stress and stored energy is released as earthquakes at the edges.
Which of these landforms would most likely be found at a divergent boundary?
Fault line
Mid-ocean ridge
Volcanic island
Mountain
Which of these landforms is most likely to be found at a convergent boundary?
Fault line
Mid-ocean ridge
Mountain
Rift valley
In an area known as The Ring of Fire, volcanic island chains have formed in the Pacific Ocean. What most likely caused this to happen?
Convergent plate boundary
Divergent plate boundary
Transform plate boundary
Mantle hot spot
The Sun is the center of our solar system and creates a large amount of gravitational force. If this system lost the Sun, what would happen to the planets?
The planets would explode.
The planets would stop moving.
The planets would travel on a different path.
The planets would continue on their same path.
The Moon travels in an elliptical orbit that is nearly circular around the Earth. This pattern has occurred for millions of years. Which of the following best explains the cause of the Moon’s motion?
The Moon is acted upon by balanced forces, so the orbit maintains the same nearly circular shape.
The gravitational forces from the Sun and the Earth on the Moon are equal, causing the Moon to maintain its orbit.
The Moon is constantly affected by the unbalanced force of the Earth’s gravity which causes it to continue to orbit the Earth.
There was a gravitational force millions of years ago that pulled the Moon in an elliptical direction and the Moon has not since been acted upon by a force.
Many objects within our solar system remain in constant motion and maintain predictable orbital patterns. What force governs the motion and patterns of objects in our solar system?
The force of gravity keeps the Sun, asteroids, and comets orbiting in an elliptical pattern around the Earth.
The force of gravity keeps planets, asteroids, and comets orbiting in an elliptical pattern around the Sun.
The equal and opposite force between the Sun and the Earth keeps the comets and asteroids orbiting in an elliptical pattern.
The Sun moves in an elliptical pattern and the planets, comets, and asteroids follow the gravity of the Sun in an elliptical pattern.
According to the diagram, which of these types of stars has the greatest luminosity?
Hot white dwarf
Hot main sequence star
Cool super giant
Cool giant
Which of the following statements accurately describes the star at location 'A'?
The star at location 'A' is less bright than the sun and has a surface temperature above 25,000 K.
The star at location 'A' is brighter than the sun and has a surface temperature below 25,000 K.
The star at location 'A' is less bright than the sun and has a surface temperature above 11,000 K.
The star at location 'A' is brighter than the sun and has a surface temperature below 11,000 K.
Based on the above diagram, which type of stars belong to spectral class K and have the lowest luminosity?
Giants
White dwarfs
Supergiants
Main-sequence stars
Stars are gathered together in vast groups known as galaxies. The Sun is a medium-sized star belonging to a galaxy called the Milky Way. Which statements would identify the Sun's placement in the Milky Way?
The sun is located in the center of a spiral-shaped galaxy.
The sun is located off the center of an elliptical-shaped galaxy.
The sun is located on an arm of a spiral-shaped galaxy.
The sun is located on an arm of an elliptical-shaped galaxy.
Which statement best describes the location of the sun in the Milky Way galaxy?
The sun is located in the center of a spiral-shaped galaxy.
The sun is located off the center of an elliptical-shaped galaxy.
The sun is located on an arm of a spiral-shaped galaxy.
The sun is located on an arm of an elliptical-shaped galaxy.
Which statement about the sun is true?
It is the hottest star in the universe.
It is closer to Earth than any other star.
It is located in the center of the Milky Way galaxy.
It is the largest type of star known to exist.
Scientists have developed many scientific theories about the origin of the universe. The most widely accepted scientific theory is the Big Bang Theory. According to your research, which of the following provides evidence to support the Big Bang Theory?
The universe is static and unchanging.
The universe is expanding.
The universe is contracting.
The universe is shrinking.
Which statement correctly compares and explains the length of daylight at the two points?
The length of daylight is shorter at Point X than at Point Y because the Northern Hemisphere is tilted away from the sun.
The length of daylight is shorter at Point X than at Point Y because the Northern Hemisphere is tilted toward the sun.
The length of daylight is longer at Point X than at Point Y because the Northern Hemisphere is tilted away from the sun.
The length of daylight is longer at Point X than at Point Y because the Northern Hemisphere is tilted toward the sun.
Which of the following has the greatest effect on the Earth’s tides?
The Moon’s gravitational pull
The Sun’s gravitational pull
The gravitational pull of Venus
The gravitational pull of Mars
Which of the following best explains why the Earth experiences different seasons?
The gravitational pull of the Moon affects the Earth's climate, leading to seasonal changes.
The Earth's rotation speed changes, affecting the length of days and nights.
The tilt of the Earth's axis causes different parts of the Earth to receive varying amounts of sunlight throughout the year.
The Earth is closer to the Sun during summer and farther during winter.
What is the primary reason for the phases of the Moon as observed from Earth?
The Moon's surface temperature changes, affecting its brightness.
The relative positions of the Earth, Moon, and Sun change, altering the visible portion of the Moon.
The Earth's shadow falls on the Moon, causing different phases.
The Moon's own light varies in intensity.
Which of the following best describes the role of gravity in the formation of stars?
Gravity causes stars to emit light and heat.
Gravity causes stars to move in elliptical orbits around the galaxy.
Gravity prevents stars from collapsing under their own weight.
Gravity pulls together gas and dust in space to form stars.
What is the primary factor that determines the brightness of a star as observed from Earth?
The star's size.
The star's age.
The star's distance from Earth.
The star's surface temperature.
Which of the following best explains why the Earth has a magnetic field?
The rotation of the Earth causes the movement of molten iron in its outer core.
The Earth's atmosphere generates a magnetic field.
The gravitational pull of the Moon affects the Earth's core.
The Earth's magnetic field is a result of its proximity to the Sun.
What is the main reason for the occurrence of tides on Earth?
The gravitational pull of the Sun on the Earth's oceans.
The Earth's distance from the Sun.
The gravitational pull of the Moon on the Earth's oceans.
The rotation of the Earth on its axis.
Which of the following best explains why stars appear to twinkle when observed from Earth?
The stars are rotating on their axes.
The stars' brightness fluctuates over time.
The Earth's atmosphere causes the light from stars to bend.
The stars are moving rapidly in space.
What is the primary reason for the occurrence of solar eclipses?
The Earth's atmosphere refracts sunlight, creating a shadow on the Moon.
The Sun moves closer to the Earth, causing a temporary blockage of light.
The Earth passes directly between the Moon and the Sun, casting a shadow on the Moon.
The Moon passes directly between the Earth and the Sun, blocking the Sun's light.
Which of the following best describes the process of nuclear fusion in stars?
Atoms lose electrons, becoming ionized and releasing energy.
Atoms combine to form heavier elements, releasing energy.
Atoms are split into smaller parts, releasing energy.
Atoms gain electrons, becoming more stable and releasing energy.
What is the primary cause of the Earth's magnetic field?
The Earth's proximity to the Sun.
The gravitational pull of the Moon.
The rotation of the Earth and the movement of molten iron in its outer core.
The movement of tectonic plates.
Which of the following best describes the process of nuclear fission?
Atoms combine to form heavier elements, releasing energy.
Atoms gain electrons, becoming more stable and releasing energy.
Atoms are split into smaller parts, releasing energy.
Atoms lose electrons, becoming ionized and releasing energy.
What is the primary reason for the occurrence of tides on Earth?
The Earth's proximity to other planets.
The gravitational pull of the Moon on Earth's oceans.
The rotation of the Earth on its axis.
The gravitational pull of the Sun on Earth's oceans.
Which of the following best describes the process of photosynthesis in plants?
Plants convert nitrogen into glucose using sunlight.
Plants convert oxygen into carbon dioxide using sunlight.
Plants convert glucose into carbon dioxide and water using sunlight.
Plants convert carbon dioxide and water into glucose and oxygen using sunlight.
Which of the following best explains why the sky appears blue during the day?
The Earth's atmosphere absorbs all colors except blue.
The Earth's surface reflects blue light back into the atmosphere.
Blue light is scattered in all directions by the gases and particles in the Earth's atmosphere.
The Sun emits blue light more than any other color.
Which of the following best describes the process of nuclear fission?
Atoms are split into smaller parts, releasing energy.
Atoms gain electrons, becoming more stable and releasing energy.
Atoms combine to form heavier elements, releasing energy.
Atoms lose electrons, becoming ionized and releasing energy.
What is the main factor that affects the gravitational force between two objects?
The shape of the objects.
The temperature of the objects.
The color of the objects.
The distance between the objects.
Which of the following best describes the process of nuclear fission?
Atoms gain electrons, becoming more stable and releasing energy.
Atoms combine to form heavier elements, releasing energy.
Atoms lose electrons, becoming ionized and releasing energy.
Atoms are split into smaller parts, releasing energy.
Which of the following best explains why the sky appears blue during the day?
The Sun emits more blue light than any other color.
Blue light is scattered in all directions by the gases and particles in the Earth's atmosphere.
The Earth's surface reflects blue light more than other colors.
Blue light travels faster through the atmosphere than other colors.
Which of the following processes is responsible for the formation of igneous rocks?
Weathering and erosion
Cooling and solidification of magma
Compaction and cementation
Metamorphism under heat and pressure
Which of the following best describes the role of chlorophyll in photosynthesis?
Chlorophyll stores energy in the form of glucose.
Chlorophyll absorbs sunlight and converts it into chemical energy.
Chlorophyll provides structural support to plant cells.
Chlorophyll transports water and nutrients within the plant.
Which of the following best explains the phenomenon of refraction?
Light bends when it passes from one medium to another due to a change in speed.
Light is absorbed by a medium and converted into heat energy.
Light is scattered in different directions when it hits a rough surface.
Light travels in a straight line without any deviation.
Which of the following statements correctly describes the process of photosynthesis?
Plants convert glucose into carbon dioxide and water using sunlight.
Plants absorb oxygen and release carbon dioxide during the day.
Plants absorb nitrogen from the air and convert it into proteins.
Plants convert carbon dioxide and water into glucose and oxygen using sunlight.
What is the primary cause of the seasons on Earth?
The rotation of Earth on its axis.
The tilt of Earth's axis.
The gravitational pull of the Moon.
The distance of Earth from the Sun.
Which of the following best explains why the sky appears blue during the day?
Blue light is emitted by the Sun.
Blue light is reflected by the oceans.
Blue light is scattered in all directions by the atmosphere.
Blue light is absorbed by the atmosphere.
What type of tide would this arrangement of earth-moon-sun create?
new moon
***NA***
first quarter
****NOPE****
last quarter/third quarter
****NOT THIS ONE***
What Seasons is position A?
Northern Hemisphere (Summer)/ Southern Hemisphere (Winter)
Northern Hemisphere (Fall)/ Southern Hemisphere (Winter)
Northern Hemisphere (Spring)/ Southern Hemisphere (Fall)
Northern Hemisphere (Winter)/ Southern Hemisphere (Summer)
What Seasons is position B?
Northern Hemisphere (Summer)/ Southern Hemisphere (Winter)
Northern Hemisphere (Fall)/ Southern Hemisphere (Spring)
Northern Hemisphere (Spring)/ Southern Hemisphere (Fall)
Northern Hemisphere (Winter)/ Southern Hemisphere (Summer)
What Seasons is position C?
Northern Hemisphere (Summer)/ Southern Hemisphere (Winter)
Northern Hemisphere (Fall)/ Southern Hemisphere (Spring)
Northern Hemisphere (Spring)/ Southern Hemisphere (Fall)
Northern Hemisphere (Winter)/ Southern Hemisphere (Summer)
What Seasons is position D?
Northern Hemisphere (Summer)/ Southern Hemisphere (Winter)
Northern Hemisphere (Fall)/ Southern Hemisphere (Spring)
Northern Hemisphere (Spring)/ Southern Hemisphere (Fall)
Northern Hemisphere (Winter)/ Southern Hemisphere (Summer)
Which part of the Earth is receiving the most direct Sunlight?
Northern Hemisphere
Southern Hemisphere
Polar Hemisphere
MidAtlantic Hemisphere
Which part of the Earth is receiving the the least direct Sunlight?
Northern Hemisphere
Southern Hemisphere
Polar Hemisphere
MidAtlantic Hemisphere
What happens during the Summer Solstice?
Most direct sunlight
Least direct sunlight
Moderate sunlight
temperate sunlight
What happens during the Summer Solstice?
shortest day
longest day
easy day
slow day
What happens during the Winter Solstice?
shortest day
longest day
easy day
slow day
What happens during the Winter Solstice?
Most direct sunlight
Least direct sunlight
Moderate sunlight
temperate sunlight
What happens during the Autumnal/Vernal Equinoxes?
Equal day and Night
Longer Days, shorter nights
Shorter Days, longer nights
Indirect sunlight
The REVOLUTION around the Sun and the TILT on the Earth's axis cause what?
Seasons
Rain
Tidal Waves
Moon Phases.
There would be no seasons if there was no ____________.
tilt
rotation
moon
Saturn
What causes day and night and spins on it's own access?
Rotation
Revolution
Orbit
Moon Phases
What is it called when an object moves around another object, also referred to as orbiting? For Earth it's 365 days or 1 year.
Revolution
Rotation
Moon's Gravity
Lunar Phases
