WorksheetsScience 8 Review Test
Total questions: 36
Worksheet time: 18mins
Which table above correctly labels the compounds and elements involved in this process?
Table A
Table B
Table C
None of these tables correctly label the process.
Observe the diagrams provided below. The shaded and unshaded circles represent the atoms of different elements. Which diagram(s) represents a mixture?
I only
I and III
III and IV
IV only
A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this compound is shown below. CH₃C₄H₈COCH₃ How many atoms of each element are in one molecule of 2-heptanone?
4 Carbon, 11 Hydrogen, 1 Oxygen
7 Carbon, 14 Hydrogen, 1 Oxygen
7 Carbon, 11 Hydrogen, 8 Oxygen
6 Carbon, 14 Hydrogen, 3 Oxygen
The table below shows the chemical formulas of four different substances. Which substances have the same number of carbon atoms?
A. Substances 1 and 2
B. Substances 2, 3, and 4
C. Substances 2 and 3
D. Substances 1 and 3
Which property of water will allow a paperclip to remain floating on top of the water?
A Adhesion
B Surface tension
C Cohesion
D Buoyancy
What evidence supports your answer to Part A?
Cohesion is the tendency of water molecules to stick together due to the force of attraction between them.
Adhesion is the ability of water molecules to stick to other surfaces or materials.
Surface tension is a measure of how difficult it is to break the surface of a liquid.
Buoyancy is the ability to float in water.
In science class, students place the bottom of a narrow glass tube into a container of water and observe that the water rises inside the tube against gravity. ________________________ is the property of water that is most directly related to this phenomenon.
Adhesion
Evaporation
Condensation
Sublimation
A student notices that an inflated balloon gets larger when it is warmed up by a lamp. Which best describes the mass of the balloon because of this change?
The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.
The mass of the balloon increases because the size of the balloon has increased.
The mass of the balloon decreases because the temperature inside the balloon has increased.
The mass of the balloon increases because the temperature of the balloon has increased.
Observe the chemical equation for photosynthesis. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ How many molecules of glucose are in the photosynthesis equation?
0 molecules
1 molecule
6 molecules
12 molecules
Students were given four air propelled rockets to launch into the air. The data is recorded on the table below.
Which rocket had the greatest acceleration?
Rocket 1
Rocket 2
Rocket 3
Rocket 4
Which of the following statements do NOT describe acceleration?
I and II
II only
I, III, and IV
IV only
Based on the image, what will happen to the child if the driver stops abruptly?
The child will not move.
The child will move backward.
The child will move forward.
The child will move down.
Which of Newton’s Laws of Motion supports the answer to Part A?
Newton’s 1st Law of Motion
Newton’s 2nd Law of Motion
Newton’s 3rd Law of Motion
Newton’s 4th Law of Motion
Newton’s Laws of Motion
Which of the following best describes how you can experience all three of Newton’s Laws of Motion as you ride on the bus (or in a car) to school?
You feel pushed back when the bus accelerates, stay in motion unless acted upon, and the bus moves forward when you push against the seat.
You only feel the effects of gravity while riding the bus.
You experience Newton’s Laws only when the bus is stationary.
You do not experience any of Newton’s Laws while riding the bus.
Which of the following correctly lists the frequencies of the four waves from greatest to least?
Wave 3, Wave 4, Wave 1, Wave 2
Wave 3, Wave 4, Wave 2, Wave 1
Wave 2, Wave 4, Wave 3, Wave 1
Wave 2, Wave 1, Wave 4, Wave 3
Fill in the blanks to correctly complete the statement below.
As the frequency of a transverse wave ________________, the wavelength of the same transverse wave ________________.
increases, decreases
increases, increases
decreases, increases
decreases, decreases
Which letter best represents the location of x-rays on the electromagnetic spectrum?
A. A
B. B
C. C
D. D
A scientist is researching devices that will kill harmful cells in the human body using high-energy waves. Which type of wave would be the most effective?
X-Rays would be the most effective because they have a long wavelength and a low frequency.
Gamma rays would be the most effective because they have a short wavelength and a high frequency.
Radio waves would be the most effective because they have the highest frequency.
Visible light would be the most effective because you can see what is being treated.
Which statements are true about the life cycle of stars?
I
II
III
IV
V
The climate in a region near the equator differs from a region located further away from the equator in that:
Equatorial regions are generally warmer and more humid than regions farther from the equator.
Equatorial regions experience colder temperatures than regions farther from the equator.
Regions farther from the equator have more rainfall than equatorial regions.
Equatorial regions have more distinct seasons than regions farther from the equator.
What would happen if the Earth was not tilted on its axis?
There would be no changes in wind zones or patterns.
There would be no wind on the Earth at all.
There would be many more major wind zones that occur.
There would only be one major wind zone from the equator to the poles and back.
The interactions between ocean currents and air masses help to produce major storms such as tropical cyclones, typhoons and hurricanes. Which of the following is a difference between these types of storms?
The location where they are formed.
The size of the storm.
The weather conditions required in order to form.
The amount of time they take to form.
Natural events are events that occur naturally and have large-scale effects on the environment. Which of the following is NOT an effect of natural events on climate?
Natural events, such as meteor impacts, can have an impact on global temperatures.
Natural events can release large amounts of greenhouse gases into the atmosphere.
Natural events can absorb large amounts of greenhouse gases from the atmosphere.
Natural events, such as changes in ocean currents, can cause global climate changes over time.
Humans can have a significant influence on the environment. From burning fossil fuels for electricity to new construction in cities, there are many negative impacts that occur. Which of the following is a positive influence humans can have on the environment over time?
Cutting down large areas of trees for residential homes.
Clearing areas of land in order to raise more livestock.
Moving out to rural areas to build more buildings and businesses.
Carpooling to work or school in order to save fuel.
A diagram of the carbon cycle is shown below. Which of the following could be done to remove carbon dioxide from the atmosphere and result in lower levels of greenhouse gases in the air?
Increase the amount of trees and plants in the area.
Increase the amount of organic waste is present in the soil.
Increase the amount of livestock, including horses and cattle.
Increase the amount of fossil fuels being burned at the industrial factory.
How would the flow of energy in the food web most likely be disrupted if the population of grass suddenly became diseased or burned in a wildfire?
The primary consumer populations would increase shortly after.
The primary consumer populations would decrease shortly after.
All of the populations in the food web would thrive.
All of the populations would be unaffected.
Four statements regarding certain ecosystems are listed below.
I. Overfishing has depleted the population of tuna.
II. Snakes are commonly hunted and eaten by birds of prey.
III. Caterpillars and other insects feed on grasses.
IV. Excess fertilizer runs off into a river and causes extreme algae growth and a lack of oxygen in the water.
Which statement(s) describe a disruption in the transfer of energy?
I and II
II and III
I, III, and IV
I and IV
Which statements are accurate in describing secondary succession only?
I
II
III
IV
V
Fill in the blanks to correctly complete the statement below. ______________ succession eventually leads to a growth in populations and species diversity after hundreds or thousands of years, whereas ______________ succession briefly causes populations and species diversity to decrease, but eventually the ecosystem reforms and population and species diversity increases over time.
Primary, secondary
Secondary, primary
Tertiary, primary
Secondary, tertiary
Which of the following is NOT an accurate statement about the biodiversity of an ecosystem?
Biodiversity helps to provide a healthy ecosystem with a large variety of food sources for many organisms.
Biodiversity allows ecosystems to adjust to significant natural disturbances such as droughts, floods, and wildfires.
Climate fluctuations, pollution, and habitat loss all contribute to increased biodiversity.
Ecological biodiversity includes diversity of habitats, communities, and ecosystems.
Which of the following ecosystems would have the greatest biodiversity?
Producers: Grasses, shrubs, flowers Primary Consumers: Rabbits, deer, grasshoppers Secondary Consumers: Frogs, lizards, mice Tertiary Consumers: Eagles, hawks, owls, coyotes
Producers: Grasses, leaves, shrubs, flowers Primary Consumers: Rabbits, deer, grasshoppers, other insects Secondary Consumers: Snakes, frogs, lizards, mice, raccoons Tertiary Consumers: Eagles, hawks, owls, coyotes
Producers: Grasses Primary Consumers: Rabbits, grasshoppers Secondary Consumers: Frogs, mice, raccoons Tertiary Consumers: Eagles
Producers: Grasses, leaves Primary Consumers: Deer, grasshoppers, other insects Secondary Consumers: Snakes, frogs, raccoons Tertiary Consumers: Hawks, coyotes
Based on the table, which organism is the most likely to be a plant?
A Organism 1
B Organism 2
C Organism 3
D Organism 4
What evidence supports the answer to Part A?
The presence of a nucleus and ribosomes.
The presence of a cell membrane and many vacuoles.
The presence of a nucleus and cytoplasm.
The presence of a cell wall, vacuole, and chloroplasts.
Which of the following statements correctly identifies the function of the mitochondria in an animal cell?
Mitochondria control what is able to come in and out of the cell.
Mitochondria are a rigid layer that provides support, strength, and shape for the cell.
Mitochondria produce the energy needed for the cell to carry out its functions.
Mitochondria hook amino acids together to make proteins.
Which of the following identifies only traits that are determined from the genes within chromosomes?
Hair texture
Presence of dimples
Earlobe attachment
Presence of freckles
Eye color
Speaking multiple languages
Absence of freckles
Hair color
Colorblindness
Riding a bike
Learning to read
Blood Type
Tongue rolling
Hairline shape
Playing an instrument
BReaking a bone
A chart with many different types of organism adaptations is shown below.
Hibernation
Migration
Shallow root system
Producing venom
