Science 2
Science 3
Science 4
Bouns Questions
Bouns Questions
100
  • Cellular functions produce waste that must be managed to maintain a stable internal balance. How are waste products handled by a cell? • A. Wastes are broken down in the cytoplasm. • B. Wastes are recycled as an energy source. • C. Wastes are released through the cell membrane. • D. Wastes are stored inside vacuoles.

Cells handle waste products primarily by releasing them through the cell membrane via a process called exocytosis.

100
  • Sovaleric acid has a smell like sweaty socks. When alcohol is added to the acid and the mixture is
    heated, no change is visible, but a new odor of sweet apples fills the room. Which of the following is the
    best explanation for this observation?
    A. A chemical change has taken place, and no new substance was produced.
    B. A physical change has taken place, and a new substance was produced.
    C. A chemical change has taken place, and a new substance was produced.
    D. A physical change has taken place, and no new substance was produced.

The correct answer is C. A chemical change has taken place, and a new substance was produced.

100
  • llnesses are caused by infections agents such as bacteria, viruses, and fungi. Which statement best
    compares bacteria and fungi?
    A. Both bacteria and fungi rely on living organisms to reproduce and survive.
    B. Bacteria are living organisms, whereas fungi are not.
    C. Bacteria and fungi always cause infectious diseases.
    D. Most bacteria and fungi are harmless and may be beneficial to other living things.

The statement that best compares bacteria and fungi is D. Most bacteria and fungi are harmless and may be beneficial to other living things.

100
  1. A recipe calls for 32 cup of flour for every batch of cookies. If you want to make 221 batches, how many cups of flour do you need?

    • Answer: 132 cups
100

What is the process by which plants convert light energy into chemical energy (glucose)?


  • Answer: Photosynthesis
200
  • Cell structures must work together to make certain the cell functions properly. The
    cell membrane and cell wall are two such structures. What role do these structures have
    in maintaining cellular homeostasis?
    • A. The cell wall produces energy by making sugar and the cell membrane breaks down
    sugar to release energy.
    • B. The cell wall stores nutrients and the cell membrane stores water.
    • C. The cell wall provides support and the cell membrane selects which materials enter
    or leave a cell.
    • D. The cell wall stores oxygen and the cell membrane stores carbon dioxide.

The correct answer is C. The cell wall provides support and the cell membrane selects which materials enter or leave a cell.

200
  • Jean’s mother lights a candle and places it on his birthday cake. As everyone sings Happy Birthday,
    the wick burns, the wax melts, the candle changes shape, and the air around the candle heats up. Which
    of the following is not an example of a physical change?
    A. The wax melting.
    B. The candle changing shape.
    C. The air around the candle heating up.
    D. The wick burning.

The answer is D. The wick burning.

200
  • Malaria parasites infect the red blood cells of 500 million hosts each year. HIV, the virus that causes
    AIDS, has been reported to infect 50,000 people each year. Which statement best differentiates the
    pathogens, parasites and viruses?
    A. Although both rely on human cells, viruses are able to survive and reproduce outside of cells.
    B. Although both rely on other living organisms to survive, parasites feed on their host organisms.
    C. Although both are living organisms, viruses break down deal plants and animals for nutrition.
    D. Although both are living organisms, parasites depend on the cells of organisms to reproduce.

The statement that best differentiates parasites and viruses is B. Although both rely on other living organisms to survive, parasites feed on their host organisms.

200

Solve for x: 3x−7=14


  • Answer: x=7
200

Name the three states of matter.


  • Answer: Solid, liquid, and gas
300

Malaria parasites infect the red blood cells of 500 million hosts each year. HIV, the virus that causes
AIDS, has been reported to infect 50,000 people each year. Which statement best differentiates the
pathogens, parasites and viruses?
A. Although both rely on human cells, viruses are able to survive and reproduce outside of cells.
B. Although both rely on other living organisms to survive, parasites feed on their host organisms.
C. Although both are living organisms, viruses break down deal plants and animals for nutrition.
D. Although both are living organisms, parasites depend on the cells of organisms to reproduce.

The statement that best differentiates parasites and viruses is B. Although both rely on other living organisms to survive, parasites feed on their host organisms.

300
  • A student places a liquid in a jar and seals it. The liquid is then heated which turns it into a gas. What
    happens to the mass of the jar and everything inside it after it was heated?
    A. The mass stayed the same.
    B. The mass increased.
    C. The mass decreased.
    D. It depends on whether a chemical reaction occurred.

The correct answer is A. The mass stayed the same.

300
  • Throughout history, science has change based on new information. Pluto is no longer
    considered a planet because scientist discovered that it has not cleared it's orbit of other objects.
    Which of the following is NOT an example of science changing based on new discoveries or
    technology?
    A. Archaea was added to the domains of classification after prokaryotes were found near hot
    volcanic vents.
    B. Chromosomes separate during mitosis and meiosis to provide genetic information to offspring.
    C. Evolutions changes when new fossil evidence is dug up.
    D. The contribution, "organisms are made of cells" was added to the cell theory after the invention
    of the microscope

The option that is NOT an example of science changing based on new discoveries or technology is B. Chromosomes separate during mitosis and meiosis to provide genetic information to offspring.

300
  1. A store is having a 20% off sale on all items. If a video game originally costs $45, what is the sale price?


  • Answer: $36
300

What is the force that pulls objects towards each other?


  • Answer: Gravity
400

Throughout history, science has change based on new information. Pluto is no longer
considered a planet because scientist discovered that it has not cleared it's orbit of other objects.
Which of the following is NOT an example of science changing based on new discoveries or
technology?
A. Archaea was added to the domains of classification after prokaryotes were found near hot volcanic vents. B. Chromosomes separate during mitosis and meiosis to provide genetic information to offspring.
C. Evolutions changes when new fossil evidence is dug up.
D. The contribution, "organisms are made of cells" was added to the cell theory after the invention of the microscope

The statement that is NOT an example of science changing based on new discoveries or technology is B. Chromosomes separate during mitosis and meiosis to provide genetic information to offspring.

400
  • The human body is comprised of many simple and complex structures that are essential for our
    survival. Which sequence of terms is in the correct order from most complex to simplest?
    A. Organ Systems → Organs → Tissues → Cells
    B. Cells → Tissues → Organ Systems → Organs
    C. Organ Systems → Organisms → Cells → Tissues
    D. Cells → Organs → Tissues → Cells

The correct sequence from most complex to simplest is A. Organ Systems → Organs → Tissues → Cells.

400
  • The cell theory has historically been a basis for the scientific study of cells. However, in recent
    history a modern cell theory has been developed. Which of the following explains why additions
    to the theory would be allowed.
    A. Several scientists confirmed the additions and documented their support.
    B. A scientist described what he observe through a new microscope on a television show.
    C. Cells are always changing so the theory must change too.
    D. Illustrations of cells were produced and published.

The correct answer is A. Several scientists confirmed the additions and documented their support.

400

What is the area of a triangle with a base of 10 cm and a height of 8 cm?


  • Answer: 40cm2
400

What are the basic building blocks of all living things?


  • Answer: Cells
500
  • A group of students is investigating how temperature affects the rate of rust formation on iron nails.
    They place identical iron nails in three beakers filled with the same amount of saltwater and maintain
    them at different temperatures: 5°C, 25°C, 40°C and 60°C. After two weeks, they observe and record the
    amount of rust on each nail. Which conclusion best explains their likely results?
    A. The reaction will be fastest at 5°C and slowest at 60°C because lower temperatures allow iron to react
    more efficiently with oxygen.
    B. The nail at 60°C will rust the most because higher temperatures increase the reaction rate between
    iron, oxygen, and water.
    C. The nail at 25°C will rust the most because rust forms best at room temperature, regardless of other
    conditions.
    D. Temperature has no effect on rust formation, so all nails will rust at the same rate

The nail at 60∘raised to the composed with power will rust the most because higher temperatures increase the reaction rate between iron, oxygen, and water. 

500
  • Every cell in our body needs oxygen and nutrients to produce energy. When we inhale, oxygen is
    taken into and transported to various parts of the body. Cells use oxygen to break down the nutrients
    from food to release energy. During this process waste products are produced. Which statement BEST
    describes the organ systems working together during this process?
    A. The immune system take in and provides oxygen to the respiratory system, which then delivers the
    oxygen to the excretory system where it is used to break down food for energy.
    B. The musculoskeletal system takes in and provides oxygen to the circulatory system, which then
    delivers the oxygen to the reproductive system that uses it to break down food for energy.
    C. The respiratory system take in and provides oxygen to the circulatory system, which then delivers the
    oxygen to cells that use it to break down food for energy.
    D. The reproductive system takes in a provides oxygen to the nervous system, which then delivers the
    oxygen to the digestive system that uses it to break down food for energy.

The best answer is C. The respiratory system takes in and provides oxygen to the circulatory system, which then delivers the oxygen to cells that use it to break down food for energy.

500
  • Scientific knowledge results from the interaction of scientists who are investigating natural
    phenomena. Which of these best describe how a scientific explanation becomes widely accepted?
    A. A hypothesis is tested repeatedly and the results of the tests are debated.
    B. A hypothesis is debated by the scientific community.
    C. A hypothesis is tested repeatedly and the results are confirmed with evidence and debated by
    the scientific community.
    D. A hypothesis is tested repeatedly and the results are partially supported by the scientific
    evidence.

The best description of how a scientific explanation becomes widely accepted is C. A hypothesis is tested repeatedly and the results are confirmed with evidence and debated by the scientific community.

500

The ratio of apples to oranges in a fruit basket is 3:4. If there are 12 apples, how many oranges are there?


  • Answer: 16 oranges
500

Describe the difference between a food chain and a food web.


  • Answer: A food chain shows a single pathway of energy transfer in an ecosystem, while a food web shows the interconnected network of multiple food chains.
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