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Science 7A > Lesson Tests > Flashcards

Lesson Tests Flashcards

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1
Q

Which of these questions could be answered using scientific investigation?

a) Do dogs make better pets than cats?
b) Why does a helium balloon float into the sky when it is released?
c) What amusement park has the roller coaster that is the most fun to ride?
d) Which book about space exploration is the best?

A

b) Why does a helium balloon float into the sky when it is released?

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2
Q

Which of these activities could be part of a scientific investigation?

a) reading parts of a play aloud
b) recording the outdoor temperature
c) discussing current events
d) learning the rules of a new game

A

b) recording the outdoor temperature

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3
Q

Which statement best describes science?

a) a list of facts that all scientists agree are true
b) a complete explanation of everything that happens in the universe
c) a systematic study of natural events and conditions
d) a collection of knowledge about Earth

A

c) a systematic study of natural events and conditions

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4
Q

Which phrase is the definition of a scientific theory?

a) an accepted description
b) an untested idea
c) an educated guess
d) a well-supported explanation

A

d) a well-supported explanation

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5
Q

Medical students use a three-dimensional reproduction of a human skeleton to learn about bones. Which of the following describes this learning tool?

a) a mathematical model
b) an X-ray model
c) a physical model
d) a computer model

A

c) a physical model

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6
Q

Although a scientific theory is well-supported and widely accepted, what might cause it to change?

a) public opinion
b) new evidence
c) a scientific law
d) individual claims

A

b) new evidence

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7
Q

Which characteristic is part of a good scientific experiment?

a) Results can be reproduced
b) Results are based on an undisclosed process or procedure
c) Results are not reviewed by peers
d) Results are based on a small sample size

A

a) Results can be reproduced

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8
Q

Which observations can you make about a base using the senses alone?

a) conducts an electrical current when dissolved in water
b) feels slippery to the touch
c) has a pH greater than that of pure water
d) has a density greater than that of pure water

A

b) feels slippery to the touch

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9
Q

Which statement is a hypothesis?

a) Sample X has a greater mass
b) There are more than 100 elements in the periodic table
c) We have found that bean seeds sprout faster than corn seeds
d) I think that bean seeds that receive 10mL of water a day will sprout faster than bean seeds that receive 5mL a day.

A

d) I think that bean seeds that receive 10mL of water a day will sprout faster than bean seeds that receive 5mL a day.

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10
Q

In which of the following is a mechanic acting most like a scientist?

a) a mechanic makes an educated guess about why a car is not working and then tests the educated guess
b) a mechanic uses a machine to lift a car in order to work underneath
c) a mechanic interacts with the public
d) a mechanic decides which type of oil would be best for a car

A

a) a mechanic makes an educated guess about why a car is not working and then tests the educated guess

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11
Q

What is one way that science has directly affected our ease of travel?

a) invention of the airplane
b) vaccine development
c) discovery of planets
d) discovery of the structure of the atom

A

a) invention of the airplane

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12
Q

Alexander Fleming was a Scottish scientist who discovered the antibiotic penicillin in 1928. In which area did Fleming’s discovery have an impact?

a) engineering
b) astronomy
c) treatment of diseases
d) conservation practices

A

c) treatment of diseases

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13
Q

Which of these structures is found in prokaryotic cells?

a) chloroplasts
b) ribosomes
c) mitochondria

A

b) ribosomes

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14
Q

Which structure releases energy from food molecules for the cell to use?

a) chlorophyll
b) cytoplasm
c) mitochondria

A

c) mitochondria

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15
Q

What is the name of the barrier that allows certain substances, such as oxygen, into or out of a cell?

a) cell membrane
b) cell wall
c) vacuole

A

a) cell membrane

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16
Q

What are the levels of organization in multicellular organisms?

a) cells; tissue; organ; organ system
b) DNA; nucleus; cells; membrane
c) cytoplasm; organelle; organ system; organism

A

a) cells; tissue; organ; organ system

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17
Q

What is the smallest functioning unit of life?

a) organelle
b) cell
c) RNA

A

b) cell

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18
Q

Who was the first scientist to conclude that all plants are made of cells?

a) Rudolph Virchow
b) Matthias Schleiden
c) Robert Hooke

A

b) Matthias Schleiden

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19
Q

Which of these structures is found in prokaryotic cells?

a) mitochondrion
b) ribosomes
c) chloroplasts

A

b) ribosomes

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20
Q

Which of these is a type of cell division?

a) osmosis
b) exocytosis
c) meiosis

A

c) meiosis

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21
Q

Which one of these is an example of active transport?

a) diffusion
b) mitosis
c) endocytosis

A

c) endocytosis

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22
Q

Which one of these is an example of passive transport?

a) osmosis
b) exocytosis
c) mitosis

A

a) osmosis

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23
Q

What are living things that cannot make their own food called?

a) bacteria
b) producers
c) consumers

A

c) consumers

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24
Q

What is the organelle that breaks down carbohydrates to release energy?

a) chloroplast
b) nucleus
c) mitochondrion

A

c) mitochondrion

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25
Q

What is a type of anaerobic respiration that produces lactic acid that can cause muscles to burn during an intense exercise?

a) fermentation
b) carbohydrates
c) cellular respiration

A

a) fermentation

26
Q

What is the green pigment used to capture light energy in photosynthesis?

a) carbon dioxide
b) chlorophyll
c) food

A

b) chlorophyll

27
Q

What is an element needed by most cells for cellular respiration?

a) oxygen
b) carbon dioxide
c) water

A

a) oxygen

28
Q

What is the process used to change sunlight into chemical energy?

a) fermentation
b) photosynthesis
c) respiration

A

b) photosynthesis

29
Q

What animal has an internal body temperature that does not change depending on the weather outside?

a) shark
b) dog
c) snake

A

b) dog

30
Q

In the process of meiosis, what kind of cells are produced?

a) haploid
b) homologous
c) diploid
d) nuclear

A

a) haploid

31
Q

Which of the following organisms can produce offspring that are genetically identical to the parent?

a) horses
b) mosquitoes
c) ducks
d) strawberry plants

A

d) strawberry plants (asexually)

32
Q

If a sexually reproducing organism has 28 chromosomes in its body cells, how many chromosomes did it inherit from each parent?

a) 7
b) 28
c) 14
d) 16

A

c) 14

33
Q

What process does a multicellular organism use to replace its damaged body cells?

a) mitosis
b) translation
c) replication
d) meiosis

A

a) mitosis

34
Q

Which statement about a zygote that forms by fertilization is correct?

a) the zygote has half the full set of chromosomes, one-fourth from each parent
b) the zygote has half the full set of chromosomes from one parent
c) the zygote has a full set of chromosomes, half from each parent
d) the zygote has two full sets of chromosomes, one from each parent.

A

c) the zygote has a full set of chromosomes, half from each parent

35
Q

Which of the following is an advantage of asexual reproduction?

a) it is a slow process
b) the organism can increase in number quickly
c) two parents are needed
d) it introduces genetic diversity in the offspring

A

b) the organism can increase in number quickly

36
Q

Which of the following best defines heredity?

a) the joining of sex cells to form the first cell of a new organism
b) the cycle through which an organism grows from a young form to a mature form
c) the technology that enables scientists to insert genetic information from one organism into another
d) the passage of genetic instructions from one generation to the next

A

d) the passage of genetic instructions from one generation to the next

37
Q

How does a sex cell differ from a body cell?

a) a sex cell has half the amount of genetic material as a body cell
b) a sex cell has more chromosomes than body cell
c) a sex cell contains homologous chromosomes
d) a sex cell does not contain chromosoms

A

a) a sex cell has half the amount of genetic material as a body cell

38
Q

How does the endocrine system send the message to increase the heart rate?

a) It sends electrical signals through nerves to the heart
b) It sends chemical signals through axon terminals to the heart
c) It sends hormones through the bloodstream to the heart
d) it sends cells through the tissues of the body to the heart

A

c) it sends hormones through the bloodstream to the heart

39
Q

What is one role of the liver?

a) the liver is responsible for most mechanical digestion that occurs
b) the liver produces bile, which helps break down fats into small droplets
c) the liver absorbs water from digested material before it moves to the rectum
d) the liver transports food through the digestive tract through peristalsis

A

b) the liver produces bile, which helps break down fats into small droplets

40
Q

Which of the following functions is shared by both the integumentary system and the respiration system?

a) elimation of wastes
b) circulation of oxygen through the body
c) regulation of the body’s growth
d) digestion of food

A

a) elimation of wastes

41
Q

The pancreas produces enzymes that break down foods into smaller molecules. Which of the following best describes the function of these enzymes?

a) peristalsis
b) chemical digestion
c) absorption
d) mechanical digestion

A

b) chemical digestion

42
Q

Which term describes the type of digestion that occurs when saliva breaks larges molecules of food into smaller ones?

a) peristalsis
b) chemical
c) absorbing
d) physical

A

b) chemical

43
Q

Through which process does physical digestion occur in the stomach?

a) acids are released from the lining of the stomach
b) smooth muscles are contracted to squeeze food together
c) starches are converted to sugars
d) proteins are broken down into smaller particles

A

b) smooth muscles are contracted to squeeze food together

44
Q

Which statement correctly describes the interaction of two body systems?

a) the endoncrine systems transports wastes from cells to the urinary system for excretion
b) the respiratory system obtains oxygen that is delivered to cells by the circulatory system
c) the nervous system produces hormones that control the function of the reproductive system
c) the digestive system transports nutrients to the integumentary system, which excretes wastes

A

b) the respiratory system obtains oxygen that is delivered to cells by the circulatory system

45
Q

Which of the following is an important function of the skeletal system?

a) it protects the inner organs
b) it fights off infections
c) it rids the body of waste products
d) it produces testosterone and estrogen

A

a) it protects the inner organs

46
Q

Which of the following correctly matches a body part with its corresponding joint?

a) the wrist contains a fixed joint
b) the hip contains a ball-and-socket joint
c) the neck contains a hinge joint
d) the elbow contains a gliding joint

A

b) the hip contains a ball-and-socket joint

47
Q

Which term best describes how organisms maintain internal condition despite changes in the environment?

a) homeostasis
b) immunity
c) respiration
d) reproduction

A

a) homeostasis

48
Q

Which process best describes pulmonary respiration?

a) eliminating pathogens from the blood and lymph fluid
b) removing wastes from the blood stream
c) obtaining oxygen and releasing carbon dioxide
d) breaking down food into smaller nutrients

A

c) obtaining oxygen and releasing carbon dioxide

49
Q

Which of the following best describes the alveoli?

a) a passageway that leads from the mouth to the top of the trachea
b) a single tube that connects the larynx to the lungs
c) tiny sacs where oxygen and carbon dioxide are exchanged
d) two folds of tissue stretched over the airway that vibrate to produce sound

A

c) tiny sacs where oxygen and carbon dioxide are exchanged

50
Q

Zeke saw a pen he dropped on the floor, and he bent down and picked up the pen. His brain had to receive information from the eyes. Then it sent signals to his muscles so he could pick up the pen. What type of neurons sent impulses to his muscles?

a) sensory
b) dendrite
c) motor
d) axon

A

c) motor
The neurons sent impulses to his muscles, which isn’t sensory.
Dendrites and axons are parts of neurons.

51
Q

What do the cells and tissues of the endocrine system release to help maintain homeostasis in the body?

a) electrical signals
b) receptors
c) hormones
d) neurotransmitters

A

c) hormones

52
Q

The eyes receive visual signals from the environment, and this information is transmitted to the brain. Which body system does this process describe?

a) excretory system
b) integumentary system
c) nervous system
d) circulatory system

A

c) nervous system

53
Q

Allergies can sometimes be _______.

a) mild
b) serious
c) life-threatening
d) all of these

A

d) all of these

54
Q

Macrophage is a white blood cell that ________.

a) makes antibodies
b) coordinates the body’s immune response
c) destroys pathogens by engulfing and digesting them
d) causes a virus

A

c) destroys pathogens by engulfing and digesting them

55
Q

Some T cells are white blood cells that _______.

a) destroys pathogens by engulfing and digesting them
b) coordinate the body’s immune response
c) make antibodies
d) cause a virus

A

b) coordinate the body’s immune response

56
Q

B cells are white blood cells that _____.

a) destroy pathogens by engulfing and digesting them
b) cause a virus
c) coordinate the body’s immune response
d) make antibodies

A

d) make antibodies

57
Q

A disease in which the immune system attacks the body’s own cells, such as rheumatoid arthritis, is called _______.

a) an allergy
b) immune deficiency
c) cancer
d) auto-immune disease

A

d) auto-immune disease

58
Q

An organism, virus, or protein that causes a disease is called ______.

a) a pathogen
b) an enzyme
c) an antibody
d) an immuntiy

A

a) a pathogen

59
Q

What is the main function of the integumentary system?

a) regulation
b) support
c) protection
d) gas exchange

A

c) protection

The integumentary system forms a protective covering.

60
Q

A woman is preparing to have a baby through natural childbirth. How will the baby come out of her body?

a) It will exit the body through the uterus
b) It will move out of the uterus and through the vagina
c) It will exit the body through the fallopian tube
d) It willl move out of the uterus and through the ovary

A

b) It will move out of the uterus and through the vagina

61
Q

Sally visits Megan’s house to play with Megan’s new kitten. Within a few minutes, Sally’s nose is runny and she is sneezing. What is most likely causing Sally’s symptoms?

a) Sally is developing an auto-immune disease
b) Sally caught a virus from the cat
c) Sally caught a cold from Megan
d) Sally is having an allergic reaction to the cat

A

d) Sallly is having an alllergic reaction to the cat

62
Q

Which of the following steps happens earliest in the fight against an invading virus?

a) Killer T cells recognize viral antigens and destroy the infected cells
b) Viral particles are engulfed by macrophages
c) B cells divide to make cells that can make antibodies
d) Helper T cells recognize the viral antigens on macrophages

A

b) Viral particles are engulfed by macrophages

Science 7A (7 decks)

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