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2023 8th Grade Living Environment Interim Assessment

Last updated about 1 year ago
29 questions
Note from the author:
1. Ensure all tabs on your Chromebook are closed before beginning your assessment.
2. You will be given 70 minutes to complete your 8th Grade Living Environment Interim Assessment.
3. Please read all questions carefully and make sure to check your work before submitting.
1. Ensure all tabs on your Chromebook are closed before beginning your assessment.
2. You will be given 70 minutes to complete your 8th Grade Living Environment Interim Assessment.
3. Please read all questions carefully and make sure to check your work before submitting.
Required
1

Base your answers to question 1 on the diagram below and on your knowledge of biology.

The diagram illustrates the movement of molecules across an artificial membrane in a U-shaped glass tube. A 1% starch solution was poured into the left side of the tube, and distilled water was placed in the right side of the tube.


Explain why the liquid level on the left side changed over the 20-minute period.

Required
1

Two biological processes that occur in certain organelles are represented in the diagrams below.


Which statement is correct regarding the types of organisms able to carry out these processes?

Required
1

Most of the reactions by which energy from carbohydrates is released for use by the cell take place within the:

Required
1

The diagram shows how ATP is used by some cell structures to perform various functions.


Which cell structure is represented by B ?

Required
1

Base your answers to question 5 on the information and graph below and on your knowledge of biology. The graph below shows changes in dissolved oxygen in a pond in the summertime over a 24-hour period.


What is the most likely reason for the variation in the dissolved oxygen levels in the pond over the 24-hour period?

Required
1

The diagram represents a sugar cube being dropped into an undisturbed beaker of water at room temperature. One sugar molecule is labeled.


Which diagram below represents the distribution of sugar molecules in the water a day later?

Required
1

As blood glucose levels increase, hormones are released to return glucose levels to normal. This is an example of:

Required
1

An enzyme that rapidly breaks down a protein molecule in the stomach may break down that same protein much more slowly in the small intestine or mouth because:

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1

Which statement describes a failure of homeostasis in humans?

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1

The diagram below represents two processes that occur in some living organisms.


X most likely represents:

Required
1

Which biological process is represented in the diagram below?

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1

The diagram below shows specialized plant cells that control openings called stomates.


The proper function of these cells is vital to the survival of the plant because they regulate the:

Required
1

The diagram below represents a portion of a cell membrane.


The arrow indicates that the cell membrane is carrying out the process of:

Answer all questions in this part.

Directions: For each statement or question, choose the word or expression that, of those given, best completes the statement or answers the question.

Base your answers to questions on the information below and on your knowledge of biology.

A student set up an experiment to test the effect of the number of seedlings planted in one pot on the rate of growth. All conditions in the experiment were the same, except for the number of plants in each pot. The results are shown in the graph at the left.
Required
1

According to the graph, which statement is true concerning the growth of the plants?

Required
1

The dependent variable for this experiment was:

Ulcers: Mystery Solved

Stomach ulcers are painful sores that develop in the stomach. Doctors once thought that ulcers were caused by stress. In the 1980s, a pair of physicians, Barry J. Marshall and J. Robin Warren, questioned the cause of ulcers. They found the bacterium Helicobacter pylori in the ulcer tissue of their patients. Even though they repeatedly presented their findings to colleagues, they were ignored until Marshall performed an astonishing experiment: He drank broth containing the bacteria and made himself sick with an ulcer! He then cured himself by taking an antibiotic.
The results were published in 1985, but it took another 10 years for doctors to regularly use antibiotics to treat ulcers. Marshall and Warren received a Nobel Prize in 2005 for this discovery.
Required
1

Which choice represents a possible hypothesis for Marshall’s experiment?

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1

The work of Marshall and Warren shows that:

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1

The structural formulas shown below represent parts of two different complex carbohydrate molecules composed of glucose subunits. Molecules 1 and 2 differ in their overall structure.


Due to the differences in structure, each of these molecules most likely:

Required
1

To capture their prey, spiders have fangs, which pierce the body wall of insects and inject venom. Spider venoms usually contain specific proteins that attack the cell membranes of the prey. The membranes and most of the contents of the insect’s body turn into a liquid that the spider then ingests for food.


These specific venom proteins are most likely:

Base your answers to question 20 on the passage and graph below and on your knowledge of biology.

Atmospheric Carbon Dioxide
Records from polar ice cores show that the natural range of atmospheric carbon dioxide (CO2) over the past 800,000 years was 170 to 300 parts per million (ppm) by volume. In the early 20th century, scientists began to suspect that CO2 in the atmosphere might be increasing beyond this range due to human activities, but there were no clear measurements of this trend. In 1958, Charles David Keeling began measuring atmospheric CO2 at the Mauna Loa observatory on the big island of Hawaii.



Required
1
Record the approximate concentration of carbon dioxide at the start of the study and describe how it compares to the concentration in 2015.

_______ ppm CO2
Required
1

A red blood cell placed in distilled water will swell and burst due to the diffusion of:

Required
2

*Complete question 22 on the separate piece of paper provided*
Make sure to show your work.

Required
1

Base your answer to the following question on the diagram below and your knowledge of biology.

The diagram illustrates what happens when a particular solution is added to a wet-mount slide containing red onion cells being observed using a compound light microscope.


Identify a process that caused the change in the cells:

Required
1

Sometimes a hypothesis is not supported. Yet, scientists consider the findings valuable. State one reason scientists would value an experiment that does not support the initial hypothesis.

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1
The sequence below represents different organizational levels within the human body, from the simplest to more complex. Complete the sequence by correctly filling in the missing levels.

organelles → _______ → tissues → _______ → organ systems → organism
Required
1

Research has shown that treadmill training increases the number of certain energy-releasing structures in the brain cells of rats.

The cellular structures referred to in this study are most likely:

Required
1

Cyanide is a poison that limits the ability of an animal cell to manufacture ATP. In a cell containing a small amount of cyanide, which process would be least affected?

Required
1

The diagram below represents a cell in the human body.


Which statement concerning the structures within this cell is accurate?

Base your answer to question 28 on the information below and on your knowledge of biology.

Bird Flu
Researchers are not sure when the H7N9 virus, referred to as bird flu, hit the China poultry markets. In February of 2012, the virus was found to have spread from birds to humans. All cases resulted from direct contact with infected poultry. The bird flu can cause severe respiratory illness in humans. Since flu viruses constantly mutate, it would be difficult to develop a vaccine ahead of time. Scientists are worried that the virus could spread easily among people, causing a worldwide outbreak of the disease.
Required
1

Based on the information, one danger of the new Bird Flu H7N9 strain is that it: