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WorksheetsTEKS 8.11 8th Grade
Total questions: 30
Worksheet time: 3hrs 30mins
A scientist made the drawings above to show how the root structures of a plant species changed over time.
Complete the sentece below:
Based on these drawings, the plant species MOST LIKELY lived in an area that changed from a ......
desert into a tundra
rainforest into a tundra
grassland to a desert
mountaintop into a hill
Which of the following is the LEAST affected by seasonal environmental conditions?
the number of crickets that hatch
size and number of pecans on a tree
growth height of sunflowers
length of horns on a steer
Fossils of tropical plants have been found in coal mines in the North Eastern United States. This type of plant is no longer found in this region of the US. What is the most likely cause of the disappearance of tropical plants in the Northeast?
Volcanic activity in the Northeast caused the tropical plants to die.
The area is so heavily populated that diverse plant growth is no longer found.
Air pollution and acid rain changed the pH of the soil and caused the tropical plants to die.
The climate of the area is different than it was when tropical plants were common.
Complete the passage below.
Clown fish live in the waving tentacles of sea anemones in the ocean. The sea anemone provides a safe place for the clown fish to escape predators. The sea anemone, although it has poisonous tentacles, does not bother the clown fish and is not harmed by the clown fish. This relationship between organisms can be described as (a)
According to the food web above, which organism(s) prey on suckerfish? (more than one correct answer)
beaver
muskrat
suckerfish
trout
Which two organisms are most likely to be competitors?
(more than one correct answer)
badger
chipmunk
hawk
snake
According to the food web above, how many different animals does the alligator feed on?
1
2
3
4
Bacteria and mold break down fallen leaves on the forest floor. When they do this, they release carbon dioxide into the atmosphere and nitrogen to the soil. Which of the following roles do bacteria and mold have in the environment?
consumers
producers
predators
decomposers
Which of these factors has the greatest influence on how many Koala live in an area?
the number of Eucalyptus trees available
the amount of rainfall in the spring
the height and variety of fruit trees available
the type of grass available
Many times a shark is seen with pilot fish swimming around it, eating scraps of food from the shark's meal. The shark is not harmed by the pilot fish, and the pilot fish benefits from the shark. What kind of relationship is this?
Parasitism
Mutualism
Predation
Commensalism
A company has purchased 15,000 acres of forest. The loggers harvest mature trees in order to supply lumber for new homes. According to the graph, the Spotted Owl and the Hawk populations are the most negatively affected organisms. What would be the most likely explanation of why this has occurred?
The Owl and Hawk numbers have dropped because the logging has depleted their food source.
The owl and hawk populations have dropped because of the pollution from the logging equipment.
The owl and hawk populations have dropped because the logging has removed the places they used for their nests.
The owl and hawk populations have dropped because they have been scared away by the presence of humans.
Fossils of tropical plants and animals can be found buried in limestone rock in the North Texas area. These plants and animals are no longer found in this region. What is the most likely cause of the disappearance of these tropical plants and animals?
Earthquakes and volcanoes destroyed all the tropical plants and animals.
Tropical animals ate all the tropical plants and everything died out.
Air pollution and acid rain killed off all the tropical plants and animals.
The climate in that area is different today than when tropical plants and animals lived there.
Water lilies have a unique set of traits. Like land plants, water lilies produce fragrant flowers. Like some water plants, the leaves of water lilies are held near the surface by small air-filled sacs. In order to survive as a land plant, a water lily would MOST LIKELY need to develop an adaptation to carry out which function?
providing support
obtaining energy
obtaining food
producing fruit
Over many years, winters in a particular region become increasingly colder. As a result, food becomes less available. Which of the following adaptations would BEST help an animal species survive both of these changes?
changing coat color with the season
adding a thick layer of fat under the skin
developing teeth with a broad, flat shape
becoming more sensitive to smells
Perry applies a small amount of liquid between his dog's shoulder blades each month. The liquid helps prevent insects from bothering his dog. Lately, the liquid does not keep fleas off his dog.
What is the likely cause of this change?
The fleas that survived exposure to the liquid once have produced offspring that are resistant to the liquid.
The weather conditions have changed. There are more fleas living in Perry's yard.
The liquid has changed the dog's fur over time. Now the liquid is absorbed into the fur rather than staying on the skin.
Perry gives his dog a bath after applying the liquid and the liquid is not able to work correctly.
An environment becomes warmer and drier over many years. Which adaptation is MOST LIKELY to help plants survive this change?
bright flowers
stubby roots
waxy leaves
long stems
Which of the following is the MOST likely negative effect of damming rivers to supply hydroelectric energy?
increased fossil fuel costs
loss of fish habitat
decreased use of electricity
higher levels of air pollution
The following map shows four cities along the United States coast. Recent water samples were taken at each of these locations in response to a diminishing fishing industry. Results from each water sample are listed in the data table below. Based on the results, what is a reasonable conclusion about human use of fertilizers and its impact on ocean ecosystems?
Increased fertilizer use appears to have a positive effect on marine fish species.
Increased fertilizer use appears to have a negative effect on marine fish species.
Based on the data, the harbor’s proximity to the equator has an effect on the number of marine fish.
Based on the data, there is no connection between the amount of fertilizer used by humans and the number of marine fish.
Many small island communities are dependent upon fishing in the waters around them. As humans have advanced their technology, they have gained the ability to be more successful at fishing. Recently, the communities have had a hard time catching fish, even with the great technology. Why is this occurring?
The fish have adapted to the new fishing technologies.
The fish have migrated to get away from the technology.
The fish population has decreased because of overfishing.
The fish population that remains is camouflaged to the technology.
This chart illustrates the type and number of items collected during a clean up of a beach. Based on the chart, what approximate percentage of the total items result from the action of people?
25%
50%
65%
75%
The image below displays the direction and magnitude of two different forces acting on an object. Which of the following statements accurately describe the resulting motion of the object based on the forces acting upon it?
Select TWO correct answers.
The object will move to the left
The object will remain stationary.
The object will move to the right.
The net force is 20 N.
The net force is 80 N.
In an investigation over force, mass, and acceleration, five different students lined up behind five different objects. Each student pushed their assigned object with the same amount of force as the other students. The distance traveled by each object is listed in the table below.
Based on the data displayed in the table above, which of the following conclusions can be made concerning the objects involved in the investigation?
Select TWO correct answers.
Object 3 had the greatest mass.
All of the objects were made of different material.
Object 4 had the greatest mass.
Object 4 had the least mass.
Objects 1, 3, and 5 were made of different material than Objects 2 and 4.
Complete the sentence below.
When a car suddenly stops, the objects in the back seat are thrown forward. This is explained by (a)
Jonas and his family are moving to another part of the city. As Jonas, his brother, and his Dad were driving one of the trucks filled with furniture to their new home, Jonas noticed that the truck seemed to take longer to stop now that it was heavier with the furniture. Which Newton's Law explains why this happens?
Newton's First Law
Newton's Second Law
Newton's Third Law
Newton's Laws do not explain why this happens.
How are speed and velocity different?
Speed includes direction
Speed indicates momentum
Velocity includes momentum
.
Velocity includes direction
Complete the statement below.
When it is winter in the Southern Hemisphere, the Northern Hemisphere is experiencing (a)
At which point on the diagram is the number of hours of daylight longest in North America?
Point A
Point B
Point C
Point D
Which moon phases are associated with the highest tides?
(select all correct answers)
full
first quarter
new
third quarter
waxing crescent
The alignment of the Moon and Sun has an effect on Earth’s ocean tides. What force causes this effect?
sun spots
magnetic fields
gravity
air resistance
Complete the statement below.
A large cloud of gas and dust from which a star begins is known as a (a)
