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WorksheetsScience /Salazar 1st semester exam
Total questions: 44
Worksheet time: 22mins
3. The magnification of a sample is controlled by changing the objective lenses in which of the following types of microscopes?
A. Compound microscope
B. Dissection microscope
C. Scanning electron microscope
D. Transmission electron microscope
6. An image of a triple beam balance and object is provided.
What is the mass of the object on the triple beam balance?
A. 303.4 g
B. 370.4 g
C. 373.0 g
D. 373.4 g
7. Victoria is comparing a plant cell to an animal cell under the microscope. Which of the following characteristics do plants and animals have in common?
A. They are prokaryotic.
B. They are eukaryotic.
C. They are autotrophic.
D. They are phototropic.
8. What type of cell has membrane-bound organelles?
A. eukaryotic cells
B. prokaryotic cells
C. both prokaryotic and eukaryotic
D. neither prokaryotic and eukaryotic
9. A student finds the mass and volume of four mystery liquids.
The student knows that the density of water is 1 g/mL. Which of the four mystery liquids can be correctly identified as water?
A. W
B. X
C. Y
D. Z
10. Which of these statements is true of asexual reproduction?
A. It produces offspring genetically identical to each other and requires one parent.
B. It produces offspring genetically identical to each other and requires two parents.
C. It produces offspring genetically different from each other and requires one parent.
D. It produces offspring genetically different from each other and requires two parents.
11. Which of the following is an example of a trait a person may have because of heredity?
A. a blister on a finger
B. a scar on a forehead
C. a light skin tone
D. a pierced ear
12. Julia made the following table.
Julia's table lists several cell organelles and their functions, but she made an error. Which of the organelles listed in the table shows the wrong function?
A. mitochondria
B. vacuole
C. chloroplast
D. nucleus
13. Which type of reproduction involves two parents and results in offspring that are not genetically identical to either parent?
A. binary fission
B. spore formation
C. sexual reproduction
D. vegetative reproduction
14. The illustration below shows an example of the levels of structural organization in living things.
Which of the following choices best completes the diagram?
A. blood
B. intestines
C. a human body
D. the circulatory system
15. If this container of liquid water was frozen into ice and then, thawed back into a liquid, what would the volume be?
A. 35
B. 22
C. 20
D. 18
16. The diagram below shows a cross that is similar to one of Mendel’s pea plant crosses.
How is blue flower color inherited in the cross shown?
A. as a co-dominant trait
B. as a recessive trait
C. as a dominant trait
D. as an incompletely dominant trait
17. Which choice best defines heredity?
A. the joining of sex cells to form the first cell
of a new organism
B. the passage of genetic instructions from
one generation to the next
C. the cycle through which an organism grows
from a young form to a mature form
D. the technology that enables scientists to
insert genetic information from one
organism into another
18. A cell was observed under a microscope. A cell wall, a nucleus, and cytoplasm were visible. Which statement is best supported by these observations? The cell is from-
A. a plant, because it contains a cytoplasm.
B. a plant, because it contains a cell wall.
C. an animal, because it contains cytoplasm.
D. an animal, because it contains a cell wall.
19. What is the main function of chloroplasts in a plant cell?
A. They produce proteins and carbon dioxide.
B. They store water, oxygen, and carbon
dioxide.
C. They transform light, water, and carbon
dioxide into sugar and oxygen.
D. They protect cells from chemicals found in
the surrounding environment.
20. Humans make tools and machines like microscopes and satellites because-
A. it is their job.
B. They are inspired by other scientists.
C. They wish to prevent accidents from happening.
D. They wish to observe and do things that they could not otherwise see or do at all.
21. Density is a physical property of matter and can be used to classify substances. Density is calculated by which of the following?
A. d=v/m
B. d=m/v
C. d= W/V
D. d=m/W
22. The diagram below shows the results of one of Mendels’ experiments crossing a pea plant with round seeds and a pea plant with wrinkled seeds.
What can be determined from the results of the experiment?
A. Smooth shape and wrinkled shape are both recessive traits.
B. Smooth shape and wrinkled shape are both dominant traits.
C. Smooth shape is a dominant trait, and wrinkled shape is a recessive trait.
D. Smooth shape is a recessive trait, and wrinkled shape is a dominant trait.
23. A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. What is the density of the rock?
A. 0.5 g/mL
B. 2 g/mL
C. 14 g/mL
D. 35 g/mL
24. Isaiah has started growing tomatoes in his backyard. He will conduct a series of experiments to determine which genetic crosses will have the greatest change of producing large tomatoes. The Punnette square provided shows the result of Isaiah’s cross of tomato plants.
.
The gene for a large-size fruits (L) in a tomato plant is dominant over the gene for small-size fruits (l). In a cross between a heterozygous parent plant with a homozygous recessive parent plant, we can predict that what percentage fo the offspring will produce large fruits?
A. 100%
B. 50%
C. 75%
D. 25%
25. All of the following are types of safety equipment EXCEPT-
A. goggles
B. lab apron
C. gloves
D. hand lens
26. Students would most likely need to wear safety gloves when answering which of the following questions during a laboratory investigation?
A. Does an object’s material affect whether it floats in water or sinks?
B. How does a pulley change the position and motion of an object?
C. At what temperature does boiling water change from a liquid to a gas?
D. How does the size of a magnet affect the number of paper clips it attracts?
27. Students are placing different soil samples in front of a fan to see which kind of soil is moved most easily by wind. What piece of safety equipment would be most important during this investigation?
A. fire extinguisher
B. gloves
C. goggles
D. first aid-kit
28. Students are conducting an investigation in which they are mixing chemicals. What safety equipment should the students be using?
Use the following diagram for question 29-30.
29. Sponges reproduce by a process known as budding. This process is the formation of a new individual that is a clone of the parent. This type of reproduction is —
A. sexual
B. sporulation
C. asexual
D. binary fission
30. What would be a possible disadvantage of the type of reproduction shown in the diagram?
A. ability to reproduce in the absence of a mate
B. results in low genetic variation of the species
C. allows for more genetic variation in the offspring
D. takes less time to produce offspring
31. Sexual reproduction —
A. results in genetic variation in the offspring
B. produces offspring that are identical to the parent
C. decreases the chances of survival of the species
D. results in genetic material being donated to offspring by only one parent
32. Which of the following statements about asexual reproduction is not true?
A. Only one parent sex cell is needed.
B. The offspring are copies of the parent.
C. Most single-celled organisms reproduce this way.
D. It results in more variation
33. Some animals, such as hydras, reproduce by budding. During budding, a part of the hydra pinches off and forms an organism. Which of the following would be a characteristic of this kind of reproduction?
A. Genetic variation occurs among offspring.
B. Two parents are required to contribute genetic information.
C. Offspring take a long time to develop.
D. Offspring are genetically identical to the parent.
34. What is the organelle that contains DNA and has a role in growth, metabolism, and reproduction called?
A. cell membrane
B. cytoplasm
C. nucleus
D. prokaryote
35. What types of organisms have cells with very large vacuoles?
A. animals
B. bacteria
C. fungi
D. plants
36. What grade level are you currently in?
A. 6th grade
B. 7th grade
C. 8th grade
D. 9th grade
37. What are the names of the two 7th Grade Science Teachers at Manzano Middle School?
A. Miss Medrano/Miss Lopez
B. Mrs. J. Salazar /Mrs. J. Treviño
C. Mrs. Lopez/Ms. Salazar
D. Ms. Richardson/Ms. Whittman
38. What does DNA contain?
A. instructions for energy transfer
B. instructions for learned behaviors
C. instructions for inherited traits
D. instructions for searching for food
39. Heredity is defined as the passage of genetic instructions from one generation to the next. Which of the following is NOT an example of these genetic instructions in humans?
A. height
B. skin color
C. dimples
D. spoken language
40. Which of the following tools is necessary in a science lab for safety purposes?
A. triple beam balance
B. a metric ruler
C. a computer
D. a fire extinguisher
41. In sexual reproduction, two parent cells contribute genetic information to form offspring that are genetically different from both parents. Which of the following best describes an advantage of sexual reproduction?
A. Organisms use energy to find a mate.
B. Organisms can produce many offspring in a short amount of time.
C. Organisms have to depend on other organisms to reproduce.
D. Sexual reproduction allows for variation among organisms in a population.
42. Students were given a hot plate and a beaker of water and are asked to heat the water and measure its temperature. What other tools and safety equipment do they need for this experiment?
A. Spring scale and gloves
B. Compass and apron
C. Thermometer and goggles
D. Hand lens and goggles
43. Information from a Material Safety Data Sheet (MSDS) for hydrochloric acid is provided. Which section shown on the MSDS lists a physical property of hydrocholoric acid?
A. description
B. hazards
C. reactivity
D. flammability
44. Which type of reproduction involves two parents and results in offspring that are not genetically identical to either parent?
A. binary fission
B. spore formation
C. sexual reproduction
D. vegetative reproduction
45. Ryan notices that all of his friend’s brothers and sisters are tall. What is the most likely explanation for this characteristic?
A. They have tall parents.
B. They have identical genes.
C. They eat only healthy foods.
D. They live in the same environment.
46. Which of the following cell organelles is only found in animal cells and is responsible for waste removal?
A. ribosomes
B. lysosomes
C. chloroplasts
D. Golgi complex
47. Terrie is making a model of DNA. Which of these shapes illustrates how her model should look?
48. Which of the following structures surround cells?
A. cell wall and nucleus
B. cell membrane and cell wall
C. cytoplasm and cytoskeleton
D. cell membrane and cytoplasm
