Physical Science

Question 1

1 Energy is measured in:
a) Volts
b) Watts
c) Joules and Newtons
d) Grams

Answer 1

Answer: c) Joules and Newtons (Easy)

Question 2

2 Compasses work by:
a) Measuring pressure
b) Reacting to magnetic fields
c) Detecting temperature
d) Using sound waves

Answer 2

Answer: b) Reacting to magnetic fields (Easy)

Question 3

3 Mass is a measure of:
a) Weight
b) How fast something moves
c) How much matter an object contains
d) The size of an object

Answer 3

Answer: c) How much matter an object contains (Easy)

Question 4

4 Which of the following is not a state of matter?
a) Liquid
b) Gas
c) Solid
d) Ether

Answer 4

Answer: d) Ether (Easy)

Question 5

5 A chemical reaction:
a) Creates energy
b) Rearranges an element’s molecular structure
c) Destroys atoms
d) Changes mass

Answer 5

Answer: b) Rearranges an element’s molecular structure (Easy)

Question 6

6 Which state of matter has mass but no definite shape?
a) Solid
b) Liquid
c) Gas
d) Plasma

Answer 6

Answer: b) Liquid (Has volume but no shape) (Easy)

Question 7

7 Which of the following is not a form of energy?
a) Heat
b) Plastic
c) Light
d) Sound

Answer 7

Answer: b) Plastic (Easy)

Question 8

8 What term describes the amount of matter in an object?
a) Mass
b) Weight
c) Volume
d) Density

Answer 8

Answer: a) Mass (Easy)

Question 9

9 Which of the following is a chemical change?
a) Boiling water
b) Dissolving sugar
c) Rusting iron
d) Melting ice

Answer 9

Answer: c) Rusting iron (Easy)

Question 10

10 What light phenomenon causes rainbows?
a) Reflection
b) Refraction
c) Diffusion
d) Dispersion

Answer 10

Answer: b) Refraction (Easy)

Question 11

11 An element’s atomic number indicates its number of:
a) Neutrons
b) Electrons
c) Protons
d) Atoms

Answer 11

Answer: c) Protons (Med)

Question 12

12 The electromagnetic spectrum measures:
a) Mass
b) Energy
c) Radiation
d) Electricity

Answer 12

Answer: c) Radiation (Med)

Question 13

13 Compounds are elements that have:
a) Different masses
b) Combined in equal masses
c) Joined together in specific ratios
d) Similar colors

Answer 13

Answer: c) Joined together in specific ratios (Med)

Question 14

14 Which of the following is not true of gases?
a) They have no definite volume
b) They expand to fill a container
c) They have mass
d) They are compressible

Answer 14

Answer: a) They have no definite volume (Med)

Question 15

15 The unit of frequency is:
a) Joule
b) Newton
c) Watt
d) Hertz

Answer 15

Answer: d) Hertz (Med)

Question 16

16 What is the SI unit of work?
a) Newton
b) Joule
c) Watt
d) Pascal

Answer 16

Answer: b) Joule (Med)

Question 17

17 Why do two magnets pull together when a north pole and south pole are close?
a) Like poles attract
b) Opposites attract
c) Magnetic fields cancel
d) Gravity pulls them

Answer 17

Answer: b) Opposites attract (Med)

Question 18

18 What is the primary process by which heat is transferred in solids?
a) Radiation
b) Conduction
c) Convection
d) Emission

Answer 18

Answer: b) Conduction (Med)

heat or electricity is directly transmitted through a substance

Question 19

19 What happens when a solid gains enough heat energy?
a) It evaporates
b) It melts into a liquid
c) It condenses
d) It freezes

Answer 19

Answer: b) It melts into a liquid (Med)

Question 20

20 What is thermal equilibrium?
a) A hot object reaches maximum temperature
b) Two objects are the same temperature and no heat flows
c) One object freezes another
d) Heat flows forever

Answer 20

Answer: b) Two objects are the same temperature and no heat flows (Med)

Question 21

21 Which determines an element’s atomic number?
a) Electrons
b) Neutrons
c) Protons
d) Isotopes

Answer 21

Answer: c) Protons (Med)

Question 22

22 What element has an atomic number of 1?
a) Oxygen
b) Helium
c) Carbon
d) Hydrogen

Answer 22

Answer: d) Hydrogen (Med)

Question 23

23 Which of Newton’s laws says that every action has an equal or opposite reaction?
a) First law
b) Second law
c) Third law
d) Law of gravitation

Answer 23

Answer: c) Third law (Med)

Question 24

24 What happens to a moving object when an unbalanced force acts on it?
a) It stops
b) It moves in a circle
c) It changes speed, direction, or both
d) Nothing happens

Answer 24

Answer: c) It changes speed, direction, or both (Med)

Question 25

25 Inertia is: a) Movement caused by force b) Tendency to speed up c) An object’s resistance to change in motion d) Friction

Answer 25

Answer: c) An object’s resistance to change in motion (Med)

Question 26

26 What does the subscript in a chemical formula indicate? a) Number of molecules b) Number of atoms of an element c) Number of bonds d) Mass

Answer 26

Answer: b) Number of atoms of an element (Med)

Question 27

27 What determines the state of matter in its usual condition? a) Volume b) Temperature only c) Kinetic energy d) Atomic number

Answer 27

Answer: c) Kinetic energy (Med)

Question 28

28 When water is heated from a liquid to gas: a) Molecules shrink b) Molecules slow down c) Molecules move more quickly and spread out d) Nothing changes

Answer 28

Answer: c) Molecules move more quickly and spread out (Med)

Question 29

29 What is the pH of pure water? a) 7 b) 1 c) 14 d) 10

Answer 29

Answer: a) 7 (Med)

Question 30

30 When does water stay at a constant temperature during heating? a) When it’s cold b) When it boils c) When it's frozen d) When cooling

Answer 30

Answer: b) When it boils (Med)

Question 31

31 Formula to determine force: a) F = mv b) F = ma c) F = mg d) F = m/v

Answer 31

Answer: b) F = ma (Hard)

Question 32

32 The element with the lowest atomic number is: a) Helium b) Oxygen c) Hydrogen d) Lithium

Answer 32

Answer: c) Hydrogen (Hard)

Question 33

33 What is the term for a result of a chemical reaction? a) Element b) Reactant c) Product d) Compound

Answer 33

Answer: c) Product(Hard)

Question 34

34 An object at rest: a) Will stay at rest unless acted on b) Is in motion c) Moves faster with time d) Loses mass

Answer 34

Answer: a) Will stay at rest unless acted on (Hard)

Question 35

35 A substance with a pH of 3 is: a) A base b) Less acidic than pH 1 c) Neutral d) More acidic than pH 1

Answer 35

Answer: b) Less acidic than pH 1 (Hard)

Question 36

36 How many hydrogen atoms are in H₂Pr₅I₁₀? a) 1 b) 2 c) 5 d) 10

Answer 36

Answer: b) 2 (Hard)

Question 37

37 What is the term for a change from a solid state directly to a gas state? A. Evaporation B. Condensation C. Sublimation D. Boiling

Answer 37

Answer: C. Sublimation (Hard) | the process where a substance changes directly from a solid to a gas

Question 38

38 What type of energy is stored in the bonds of chemical compounds? A. Thermal B. Nuclear C. Chemical D. Electrical

Answer 38

Answer: C. Chemical (Hard)

Question 39

39 According to Newton's Law of Universal Gravitation, what happens to gravitational force between two objects if the distance between them is halved? A. The force is doubled B. The force is halved C. The force is quadrupled D. The force remains unchanged

Answer 39

Answer: C. The force is quadrupled (Hard)

Question 40

40 How do you read H₂O as a chemical formula? A. 2 Hydrogen atoms and 2 Oxygen atoms B. 1 Hydrogen and 2 Oxygen atoms C. 2 Hydrogen atoms and 1 Oxygen atom D. 1 Hydrogen atom and 1 Oxygen atom

Answer 40

Answer: C. 2 Hydrogen atoms and 1 Oxygen atom (Hard)

Question 41

What law defines the relationship between force, mass, and acceleration? A. Newton’s First Law of Motion B. Newton’s Second Law of Motion C. Law of Thermodynamics D. Einstein’s Theory of Relativity

Answer 41

Answer: B. Newton’s Second Law of Motion

Question 42

What type of reaction involves two or more reactants forming one product? A. Decomposition B. Displacement C. Combination D. Combustion

Answer 42

Answer: C. Combination

Question 43

What type of reaction involves two or more reactants forming one product? A. Decomposition B. Displacement C. Combination D. Combustion

Answer 43

Answer: C. Combination

Question 44

What reaction breaks down a compound into simpler substances? A. Combination B. Decomposition C. Synthesis D. Combustion

Answer 44

Answer: B. Decomposition

Question 45

What reaction typically involves carbon and oxygen and is also known as burning? A. Decomposition B. Combustion C. Combination D. Neutralization

Answer 45

Answer: B. Combustion

Question 46

Which system contains the cerebrum, medulla, spinal cord, and nerves? A. Endocrine system B. Respiratory system C. Nervous system D. Cardiovascular system

Answer 46

C. Nervous system

Question 47

Which system processes stimuli and controls reactions like pulling your hand away from a hot stove? A. Endocrine system B. Nervous system C. Muscular system D. Skeletal system

Answer 47

Answer: B. Nervous system | your body's complex communication network

Question 48

Which system includes the heart, arteries, veins, capillaries, and blood? A. Respiratory system B. Cardiovascular and circulatory systems C. Lymphatic system D. Excretory system

Answer 48

Answer: B. Cardiovascular and circulatory systems

Question 49

Which system delivers oxygen and nutrients, and removes waste from the body? A. Digestive system B. Respiratory system C. Cardiovascular and circulatory systems D. Integumentary system

Answer 49

Answer: C. Cardiovascular and circulatory systems

Question 50

Which system contains the kidneys, bladder, and urethra? A. Digestive system B. Lymphatic system C. Renal and urinary system D. Integumentary system

Answer 50

Answer: C. Renal and urinary system | filtering waste from the blood, producing urine, expelling from body

Question 51

Which system filters toxins from the blood and excretes them in urine? A. Respiratory system B. Endocrine system C. Renal and urinary system D. Digestive system

Answer 51

Answer: C. Renal and urinary system

Question 52

Which system contains the nose, nasal cavity, trachea, and lungs? A. Respiratory system B. Cardiovascular system C. Muscular system D. Nervous system

Answer 52

Answer: A. Respiratory system

Question 53

Which system inhales oxygen, releases energy, and exhales carbon dioxide? A. Digestive system B. Respiratory system C. Renal system D. Lymphatic system

Answer 53

Answer: B. Respiratory system

Question 54

Which system includes the mouth, esophagus, stomach, and intestines? A. Endocrine system B. Respiratory system C. Digestive and excretory system D. Nervous system

Answer 54

Answer: C. Digestive and excretory system

Question 55

Which system breaks down food and eliminates waste? A. Respiratory system B. Renal system C. Digestive and excretory system D. Immune system

Answer 55

Answer: C. Digestive and excretory system

Question 56

Which system includes smooth, cardiac, and skeletal muscles? A. Skeletal system B. Muscular system C. Nervous system D. Integumentary system

Answer 56

Answer: B. Muscular system

Question 57

Which system allows bodily movement and organ contraction? A. Skeletal system B. Nervous system C. Muscular system D. Circulatory system

Answer 57

Answer: C. Muscular system

Question 58

Which system contains bones, joints, tendons, and cartilage? A. Endocrine system B. Skeletal system C. Muscular system D. Nervous system

Answer 58

Answer: B. Skeletal system | provides the body with its framework and support.

Question 59

Which system supports body structure and movement? A. Muscular system B. Skeletal system C. Digestive system D. Lymphatic system

Answer 59

Answer: B. Skeletal system

Question 60

Which system includes the thyroid, pituitary, adrenal, and pineal glands? A. Lymphatic system B. Endocrine system C. Digestive system D. Circulatory system

Answer 60

Answer: B. Endocrine system

Question 61

Which system communicates via hormones? A. Nervous system B. Respiratory system C. Endocrine system D. Muscular system

Answer 61

Answer: C. Endocrine system

Question 62

Which system contains lymph nodes, spleen, tonsils, and lymph? A. Endocrine system B. Lymphatic and immune system C. Muscular system D. Respiratory system

Answer 62

Answer: B. Lymphatic and immune system

Question 63

Which system includes the skin, hair, nails, and sweat glands? A. Integumentary and exocrine system B. Lymphatic system C. Nervous system D. Endocrine system

Answer 63

Answer: A. Integumentary and exocrine system

Question 63

Which system helps remove toxins and fight infection? A. Respiratory system B. Digestive system C. Lymphatic and immune system D. Skeletal system

Answer 63

C. Lymphatic and immune system

Question 64

Which system includes the skin, hair, nails, and exocrine glands such as sweat glands? A. Nervous system B. Integumentary and exocrine system C. Lymphatic and immune system D. Endocrine system

Answer 64

Answer: B. Integumentary and exocrine system

Question 65

Which system enables and controls the production of offspring? A. Endocrine system B. Muscular system C. Digestive system D. Reproductive system

Answer 65

Answer: D. Reproductive system

Question 66

Which system enables and controls the production of offspring? A. Urinary system B. Endocrine system C. Muscular system D. Reproductive system

Answer 66

Answer: D. Reproductive system