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WorksheetsEOG 8th Science Review
Total questions: 65
Worksheet time: 1hrs 19mins
If a substance is composed of one type of atom that is arranged in one particular way, how is this substance best classified
element
compound
mixture
gas
In the current model of the Periodic Table of Elements, the elements have been placed in groups or families. Why have the elements been organized in such a way?
Elements in each group have similar densities.
Elements in each group all have similar boiling points.
Elements in each group have similar physical and chemical properties.
Elements in each group have the ability to chemically react with the other elements within that group.
A science teacher mixes calcium chloride and vinegar in a test tube. He passes the test tube around for his students to feel. The students notice that the test tube is hot. The science teacher asks the students to decide if the mixing of the two chemicals involved a physical or chemical change. He also asks the students to justify their answer. Which student gave the correct response?
Student 1: The change was physical because a temperature change occurred.
Student 2. The change was chemical because a temperature change occurred.
Student 3: The change was physical because the two chemicals mixed.
Student 4: The change was chemical because the two chemicals mixed.
A scientist performed an investigation using the following substances:
Based on the investigation and the packing of sample C, which measurement would most likely be the mass of the crystal?
25 grams
71 grams
110 grams
117 grams
Which is a concern related to the production of electricity using nuclear power?
Nuclear power produces too much excess heat and causes global warming.
Nuclear power produces radioactive wastes that are difficult to eliminate.
Nuclear power is not as efficient in producing electricity as are other forms of energy.
Nuclear power plants take up too much space for the amount of electricity they produce.
The U.S.A. and other countries are often promoting the conservation of electricity and fossil fuels. Which is an advantage of these conservation efforts?
Conservation will allow electricity to be produced more cheaply.
Conservation will help scientists find more uses for nonrenewable resource.
Conservation will give scientists more time to find renewable alternatives to produce electricity.
Conservation will provide all people on Earth access to electricity.
How are estuaries connected to oceanic organisms?
Estuaries provide a nursery founds for oceanic organisms
Estuaries provide sunlight for oceanic organisms.
Estuaries provide primary food for oceanic organisms.
Estuaries provide excess dissolved oxygen for oceanic organisms.
How would excessive increases in nitrate and phosphorus concentration affect freshwater systems?
It would cause excessive algal blooms.
It would cause increased dissolved oxygen.
It would cause increased water clarity.
It would cause extremely cold water.
If your community was planning to build a new sanitary landfill, what would be the most important environmental consideration in locating the landfill?
cost of the land
location of the groundwaer
proximity to an industrial park
accessibility to a major highway
This diagram shows a cross section of land that has not been overturned and includes a fossil. What can be concluded about the age of the fossil?
It is younger than the shale.
It is older than the shale.
It is older than the sandstone.
It is younger than the sandstone.
An index fossil is found in the same sedimentary layer as another fossil. What would this reveal about the other fossil?
The relative age of the fossil.
That the two fossils are from the same species.
The fossil is older than the index fossil.
The fossil is younger than the index fossil.
How are viruses, bacteria and parasites alike?
They are unicellular and can cause disease.
They are multi-cellular and can cause disease.
They are non-living and can cause disease.
They can infect a host and cause disease.
Which is a major difference between an epidemic and a pandemic?
An epidemic is caused by toxins but a pandemic is caused by viruses.
An epidemic results in more deaths than a pandemic.
An epidemic affects fewer people than a pandemic.
An epidemic spreads father around the world than a pandemic.
Strawberries have been genetically modified to resist frost. How is this a benefit for growers in North Carolina?
a longer growing season
a pest resistant berry
a larger berry
easier harvesting
Which of the following limiting factors will most likely prevent further population growth within an ecosystem?
excess water supply
food supply to the area
transportation availability
recycling of human goods
A tick has caused a dog to be diagnosed with Lyme disease. What type of relationship would this suggest exists between the tick and the dog?
mutalistic
parasitic
commensal
adaptive
In a food web, energy flows from producer to consumers. What else flows from the producers to consumers?
soil and rock
carbon and oxygen
light and sound
chlorophyll and nitrogen
The shaded areas of this diagram represent where fossils of a land- dwelling animal were found on the continents of South America and Africa. What does this evidence suggest?
The animals swam from one continent to the other
The two continents were once connected by a land bridge.
The animals developed on the two continents at the same time.
The two continents were once joined as part of a larger continent.
Differences in the homologous structures shown below, supports the hypothesis that these organisms:
are member of the same species
live in the same environment
have similar ancestors but adapted to live in different environments
all contain the same genetic information.
Darwin observed many birds that had many different beak shapes and sizes. There were few beaks that were similar because of…
competition for the same type of food
competition for a specific concentration of oxygen in the atmosphere
the presence of an excessive number of autotrophs
the presence of a disease that attacks birds with similar beak
You notice as you run up a flight of stairs to your next class that your heart is pounding and your breathing is deeper and more rapid than when you started. After a short time setting in class, your respiration rate and heart rate seem to return to normal. You know that during exercise, your heart rate, respiration, blood pressure, and ability to hold your breath (maximum breath-holding time) change. You gather the data shown in the table below. As you exercise, why does respiration rate increase?
Your systolic blood pressure is increasing
Your diastolic blood pressure is decreasing.
You are sweating and need more water vapor.
More oxygen is needed to utilize the body's stored energy.
How do the cells of the body respond when a person, over time, has a poor diet and little exercise?
They stop reproducing.
They reduce their rate of respiration.
They stop aboorbing nutrients.
They increase their production of protein .
Which statement best describe the periodic table?
Each column forms a period
The number of electrons decreases from the left to right
The atomic mass dereases from the left to right
Elements in the same group have similar chemical properties
Which of these elements is most likely to have chemical properties similar to those of calcium (Ca)?
Magnesium (Mg)
Neon (Ne)
Potassium (K)
Zirconium (Zr)
What percentage of Earth's surface is covered with water?
30 percent
50 percent
70 percent
90 percent
Which is a possible consequence of using hydropower to produce electricity?
Dams may flood areas
Radioactive waste may be produced
air pollution may increase
more fossil fuel may be used
What is the relationship between water temperature and dissolved oxygen?
as water temperature increase, dissolved oxygen increase
water temperature has no effect on the amount of dissolves oxygen
dissolved oxygen decreases as water temperature decrease
cold water contain more dissolved oxygen than warm water
Which term best describes an outbreak of flu that affects many people in a local area?
vector
pathogen
epidemic
pandemic
Which is least likely to show two species share a common ancestor?
They have similar genetic sequences
they have similar embryo development
They have analogous body structure
They have homologous body structure
Which is best shown that two species evolved from a common ancestor?
They are found in the same part of the world
They eat the same types of food
Their embryos develop in a similar way
They have the same predators and parasites
Which term best describe the area of water that drains into a river?
watershed
aquifer
estuary
ocean
Studying biotechnology is most likely to be useful for which career?
computer scienctist
nuclear physicist
agricultural researcher
archaeologist
How do plant release energy they need to carry out their life processes?
by photosynthesis
by respiration
by mitosis
by absorption
In a chemical reaction burning natural gas starts with 8 atoms of hydrogen (H), how many atoms of hydrogen should be the product?
1 atoms of hydrogen (H)
4 atoms of hydrogen (H)
2 atoms of hydrogen (H)
8 atoms of hydrogen (H)
Which best describe an outbreak of flu worldwide?
pathogen
vector
pandemic
epidemic
Measles is a disease caused by a virus. Which is the most effective way to keep measles from spreading?
giving antiviral medicine to people who have measles
having healthy people wash hands often
giving antibiotics to people with measles
vaccinating healthy people against measles
What is Natural Selection?
The process were only plants better adapted to their environment tend to survive and produce more offspring.
The process were only humans better adapted to their environment tend to survive and produce more offspring.
The process were individuals better adapted to their environment tend to survive and produce more offspring.
The process were organisms better adapted to their environment tend to survive and produce more offspring.
Based on this information, how would the recreational lake
most likely appear?
In which kind of rock do we usually find a fossil?
sedimentary rock
igneous rock
metamorphic rock
magma rock
What is an adaptation?
a special feature that helps animals to survive and reproduce.
the animal's environment it lives in.
the way an animal hunts it's prey.
the carrying capacity of a species.
Behavioral adaptations pertain to.....
the body
outside the body
inside the body
what the animal does to survive
The number of individuals a habitat can sustain with the resources it has available
Carrying capacity
Limiting factors
Resources
Population
This is a type of mixture where one substance dissolves into another
Solution
Miscibility
Compound
Solubility
The simplest form of matter is an element, what is a compound?
Two elements mixed together in a container.
Two or more pure substances chemically combined.
A material found on the Periodic Table.
Two or more elements physically combined and mechanically separable.
Which of the following represents a compound?
H
Cu
NaCl
O3
When DNA is manipulated and moved from one source to another it is known as
genetic engineering
electrophoresis
gene therapy
GMO
