S9INTEGRATED SCIENCE 9Units 01–04 Cumulative Benchmark
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Units 01–04 Cumulative Chapter Test

Directions

Complete all 60 objective questions and four constructed responses. Show calculations and reasoning. Do not use personal or family medical or genetic information.

Interactive Test

Objective Answer Sheet

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Objective Questions

1. Which question is directly testable with measurements?
  1. Why is nature beautiful?
  2. How does paper-helicopter rotor length affect mean fall time when paper type and drop height are controlled?
  3. Which scientific subject is most important?
  4. Should everyone enjoy laboratory work?
2. A student changes water temperature and measures how far dye spreads in 60 seconds. What is the independent variable?
  1. Distance spread
  2. Elapsed time
  3. Water temperature
  4. Amount of dye spread
3. In an investigation of ramp height and toy-car travel distance, which factor should be controlled?
  1. The toy car used in every trial
  2. The measured travel distance
  3. The selected ramp height
  4. The calculated mean distance
4. Why are repeated trials useful?
  1. They guarantee the hypothesis is correct.
  2. They remove the need to report individual values.
  3. They make every measurement accurate.
  4. They reveal variation and improve confidence in an estimate such as the mean.
5. Measurements of 9.8 cm, 9.8 cm, 9.9 cm, and 9.8 cm are best described as:
  1. Known to be accurate
  2. Highly precise
  3. Both inaccurate and imprecise
  4. Impossible to evaluate in any way
6. Which statement is an operational definition of seedling growth?
  1. Growth means becoming healthier.
  2. Growth is whatever the observer notices.
  3. Growth is the change in stem height, in centimeters, from Day 1 to Day 14.
  4. Growth is an increase that occurs naturally.
7. What is the mean of 1.4 s, 1.5 s, 1.5 s, 1.6 s, and 1.5 s?
  1. 1.5 s
  2. 1.4 s
  3. 1.6 s
  4. 7.5 s
8. What is the range of 2.1 cm, 2.3 cm, 2.2 cm, 2.5 cm, and 2.4 cm?
  1. 0.2 cm
  2. 0.3 cm
  3. 2.3 cm
  4. 0.4 cm
9. Which graph is generally most suitable for showing the relationship between two continuous numerical variables?
  1. Pie chart
  2. Scatter plot
  3. Pictogram
  4. Single-category bar
10. One result is far from all repeated measurements. What is the best first response?
  1. Delete it without mentioning it.
  2. Change it to equal the mean.
  3. Check the method and equipment, repeat if possible, and document the result.
  4. Assume the entire investigation failed.
11. An observational study finds that longer sleep is associated with higher test scores. Which conclusion is justified?
  1. Sleep duration and test score were associated in the observed sample.
  2. Longer sleep caused every score difference.
  3. Test scores caused students to sleep longer.
  4. No other variable could be involved.
12. Which statement is reasoning in a claim-evidence-reasoning explanation?
  1. The mean fall time was 1.8 seconds.
  2. Longer rotors had a greater mean fall time.
  3. Five trials were completed at each rotor length.
  4. Longer rotors can increase air resistance, so the longer measured fall times support the claim.
13. A graph axis begins at 95 and displays values from 96 to 100. What should a reader do?
  1. Assume the graph is fraudulent.
  2. Read the scale carefully because visual differences may appear exaggerated.
  3. Replace every value with zero.
  4. Ignore the labels and compare bar heights only.
14. Which feature most strengthens a causal experiment?
  1. Using the most colorful graph
  2. Collecting opinions instead of measurements
  3. Deliberately changing one factor while controlling alternative explanations
  4. Removing all unexpected data
15. A planned method creates a risk that cannot be reasonably controlled with available equipment. What should the investigator do?
  1. Revise or replace the method before beginning.
  2. Proceed if the investigation is interesting.
  3. Hide the risk from participants.
  4. Complete only one trial.
16. Which statement is part of modern cell theory?
  1. Every cell contains a membrane-bound nucleus.
  2. Viruses are complete cells.
  3. All living organisms are made of one or more cells.
  4. Cells arise only from nonliving matter.
17. Which pair is present in all known cells?
  1. Nucleus and chloroplasts
  2. Plasma membrane and ribosomes
  3. Cell wall and mitochondria
  4. Vacuole and Golgi apparatus
18. Which feature distinguishes a typical eukaryotic cell from a typical prokaryotic cell?
  1. A plasma membrane
  2. Ribosomes
  3. DNA
  4. DNA enclosed within a membrane-bound nucleus
19. Which organelle modifies, sorts, and packages many proteins in a eukaryotic cell?
  1. Golgi apparatus
  2. Ribosome
  3. Cell wall
  4. Nucleoid
20. Which statement about photosynthetic plant cells is correct?
  1. They contain chloroplasts but never mitochondria.
  2. They respire only in darkness.
  3. They commonly contain both chloroplasts and mitochondria.
  4. Every plant cell contains chloroplasts.
21. An image is 25 mm long and the specimen is 0.05 mm long. What is the magnification?
  1. x50
  2. x500
  3. x1,250
  4. x5,000
22. What is 0.075 mm expressed in micrometers?
  1. 75 micrometers
  2. 7.5 micrometers
  3. 750 micrometers
  4. 0.075 micrometers
23. What does selectively permeable mean?
  1. The membrane blocks every substance.
  2. The membrane allows only water to cross.
  3. Every substance crosses at the same rate.
  4. Some substances cross more readily than others.
24. Diffusion is best described as:
  1. Movement against a concentration gradient using cellular energy
  2. Net movement of water only through a membrane
  3. Net movement of particles from higher to lower concentration due to random motion
  4. Bulk movement caused only by gravity
25. A plant cell is placed in a solution more dilute than its cell contents. What is the expected net water movement?
  1. Out of the cell
  2. Into the cell
  3. No molecular movement
  4. Only into the nucleus
26. Which process can move mineral ions into a root cell against their concentration gradient?
  1. Active transport
  2. Osmosis
  3. Simple diffusion only
  4. Cytokinesis
27. What is the surface-area-to-volume ratio of a cube with side length 3 cm?
  1. 6:1
  2. 3:1
  3. 1:1
  4. 2:1
28. Why is a high surface-area-to-volume ratio often advantageous for a cell?
  1. It prevents all water movement.
  2. It eliminates the need for energy.
  3. It provides more exchange surface relative to the material that must be supplied.
  4. It guarantees the cell can grow without limit.
29. Which sequence shows increasing biological organization?
  1. Organ to tissue to cell to organ system
  2. Cell to tissue to organ to organ system
  3. Tissue to cell to organ system to organ
  4. Cell to organ system to tissue to organ
30. Which statement correctly compares photosynthesis and cellular respiration?
  1. Photosynthesis stores energy in organic molecules; respiration releases usable chemical energy from organic molecules.
  2. Only animals perform cellular respiration.
  3. Photosynthesis releases all energy as heat.
  4. The two processes use identical reactants and products in the same direction.
31. Homeostasis is best described as:
  1. Keeping every internal value perfectly constant
  2. Preventing all environmental change
  3. Controlling only body temperature
  4. Maintaining internal conditions within functional ranges despite change
32. Which sequence correctly represents a basic feedback pathway?
  1. Effector to stimulus to response to receptor to coordinator
  2. Stimulus to receptor to coordinator to effector to response
  3. Coordinator to response to stimulus to receptor to effector
  4. Response to effector to coordinator to receptor to stimulus
33. In negative feedback, the response generally:
  1. Opposes the initial change
  2. Amplifies the change without an endpoint
  3. Stops all molecular motion
  4. Creates a new chromosome
34. Which process is commonly modeled as positive feedback?
  1. Blood-glucose regulation
  2. Thermoregulation
  3. Blood clotting at a damaged vessel
  4. Water balance through ADH
35. Which route carries blood from the right ventricle to the left atrium?
  1. Aorta to body capillaries to vena cava
  2. Pulmonary artery to lung capillaries to pulmonary veins
  3. Pulmonary vein to lung capillaries to pulmonary artery
  4. Vena cava to body capillaries to aorta
36. Which statement correctly defines arteries and veins?
  1. Arteries always carry oxygenated blood.
  2. Veins always carry deoxygenated blood.
  3. Arteries have no muscle and veins have thick muscle.
  4. Arteries carry blood away from the heart; veins carry blood toward the heart.
37. Which alveolar feature most directly supports rapid gas exchange?
  1. Large surface area and thin exchange surfaces
  2. A thick dry wall
  3. A small blood supply
  4. Long diffusion distance
38. How do breathing and cellular respiration differ?
  1. They are two names for the same process.
  2. Breathing releases energy from glucose inside mitochondria.
  3. Breathing moves air; cellular respiration transfers chemical energy in cells.
  4. Cellular respiration occurs only in lungs.
39. Heart rate rises from 64 beats per minute to 96 beats per minute. What is the percent increase?
  1. 32%
  2. 50%
  3. 64%
  4. 150%
40. Chemical digestion mainly:
  1. Moves food through the esophagus
  2. Stores nutrients in the stomach
  3. Removes metabolic wastes through kidneys
  4. Breaks large insoluble molecules into smaller soluble molecules
41. Which organ produces bile?
  1. Liver
  2. Pancreas
  3. Small intestine
  4. Kidney
42. During dehydration, increased ADH generally causes:
  1. Less water reabsorption and more urine
  2. No change in kidney function
  3. More water reabsorption and lower urine volume
  4. Glucose release from the liver
43. Which response helps increase heat loss when body temperature rises?
  1. Shivering and reduced skin blood flow
  2. Sweating and increased skin blood flow
  3. Increased insulation and muscle contraction
  4. Reduced evaporation
44. Which statement correctly compares insulin and glucagon?
  1. Both always raise blood glucose.
  2. Both are nervous impulses.
  3. Neither acts on target cells.
  4. They have opposing regulatory effects on blood glucose.
45. Which comparison is accurate?
  1. Nervous signals are often rapid and targeted; endocrine signals often begin more slowly and last longer.
  2. Endocrine signals travel only through neurons.
  3. Nervous signals require hormones in the blood.
  4. Every cell responds to every hormone.
46. Which statement correctly relates a gene to DNA?
  1. A gene is a complete cell.
  2. A gene is a whole chromosome set.
  3. A gene is a DNA region involved in a functional product or regulation.
  4. A gene is an environmental condition.
47. An allele is:
  1. A variant form of a gene
  2. A stage of mitosis
  3. A whole genome
  4. A type of organelle
48. During which phase is DNA copied before mitosis?
  1. G1
  2. Cytokinesis
  3. Anaphase
  4. S phase
49. Mitosis followed by cytokinesis in a typical diploid body cell usually produces:
  1. Four haploid cells
  2. Two daughter cells with the same chromosome number as the parent cell
  3. One cell with no chromosomes
  4. Two gametes with half the chromosome number
50. Cells with similar DNA can develop different functions mainly because:
  1. Each cell loses every unused chromosome.
  2. DNA changes into a different chemical in each tissue.
  3. Different sets of genes are expressed in different cells.
  4. Only nerve cells contain genes.
51. Asexual offspring are generally:
  1. Genetically very similar to one parent except for mutation and other changes
  2. Produced only through meiosis and fertilization
  3. Guaranteed to be completely identical in every trait
  4. Always less successful than sexually produced offspring
52. Why is meiosis called a reduction division?
  1. It reduces cell size only.
  2. It shortens every chromosome.
  3. It removes every mutation.
  4. It halves the chromosome number in the resulting cells.
53. Homologous chromosomes are:
  1. Identical sister chromatids joined at one centromere
  2. A pair carrying corresponding genes, one inherited through each parent
  3. Two unrelated chromosomes with different gene categories
  4. Structures found only in bacteria
54. Which process creates new combinations of existing alleles during meiosis?
  1. Cytokinesis
  2. DNA translation
  3. Crossing over
  4. Binary fission
55. Independent assortment refers to:
  1. Random orientation and separation of homologous chromosome pairs
  2. Every gene moving independently even when genes are linked
  3. DNA replication producing sister chromatids
  4. Asexual reproduction
56. What does fertilization restore in a typical diploid life cycle?
  1. A cell without DNA
  2. Four nuclei
  3. The haploid number
  4. The diploid chromosome number
57. A dominant allele is one that:
  1. Is always the most common allele
  2. Is expressed in the heterozygous phenotype under the stated model
  3. Is biologically stronger or more valuable
  4. Cannot mutate
58. For the cross Aa x Aa, what is the expected probability of genotype aa?
  1. 0%
  2. 50%
  3. 25%
  4. 75%
59. Red RR flowers crossed with white WW flowers produce pink RW offspring. This pattern is:
  1. Incomplete dominance
  2. Codominance
  3. Complete dominance
  4. Independent assortment
60. Which statement is scientifically accurate?
  1. Every mutation is harmful.
  2. Phenotype is determined by genes alone.
  3. Somatic mutations are always inherited.
  4. Mutation effects and phenotype depend on biological and environmental context.

Constructed Responses

Constructed Response 1 · Inquiry, Measurement & Evidence

A student asks: “How does paper-helicopter rotor length affect mean fall time from a fixed height?” Design a safe investigation. Identify the independent and dependent variables, at least five controlled variables, an operational definition, equipment resolution, at least five trials per condition, a raw-data table plan, the most suitable graph, anomaly handling, one safety stop condition, and the form of the final claim-evidence-reasoning explanation.

Constructed Response 2 · Cells, Scale & Transport

A microscope image of a cell is 36 mm wide at x600 magnification. Calculate the actual width in millimeters and micrometers. The image shows a membrane-bound nucleus. Explain the classification supported by that evidence and two image limitations. Then explain why a potato sample may gain mass in dilute solution and lose mass in concentrated solution, including osmosis, selective permeability, percent mass change, and two experimental limitations.

Constructed Response 3 · Body Systems & Homeostasis

A fictional student has a resting heart rate of 68 beats per minute, 102 immediately after activity, 86 after one minute, and 72 after three minutes. Calculate the absolute and percent increase. Describe recovery. Explain how respiratory and circulatory systems cooperate, how negative feedback supports recovery, and why this dataset cannot diagnose health. Identify at least four limitations.

Constructed Response 4 · Cell Division & Inheritance

In fictional moonflowers, RR is red, RW is pink, and WW is white. Two pink plants produce 160 offspring: 42 red, 80 pink, and 38 white. Construct the cross, calculate expected probabilities and counts, compare observed and expected results, explain sampling variation, connect meiosis and fertilization, explain how reduced water could change height without changing flower-color genotype, and include one privacy or ethics safeguard.