Science 9 (Abeka) quarter exam

What law states that temperature and pressure are directly related when volume is constant?

Amontons's law

What is the density of an object with mass 27 g and volume 9.0 cm³?

3.0 g/cm³

How many significant digits are in 0.02063?

Four

What is the attractive force between unlike molecules?

Adhesion

What device measures altitude?

Altimeter

What is the average speed of a person who walks 28 km in 7.0 h?

4.0 km/h

What is the ratio of input distance to output distance?

IMA (ideal mechanical advantage)

What law states that force = mass × acceleration?

Second law of motion

What is the rate of doing work?

Power

What is the product of an object's mass and velocity?

Momentum

What causes an object to travel in a curved path instead of straight?

Centripetal force

What principle states buoyant force equals weight of displaced fluid?

Archimedes' principle

What is the SI unit of pressure?

Pascal

Who discovered the laws of motion and gravitation?

Sir Isaac Newton

What fluid friction slows an object moving through a fluid?

Drag

What force is perpendicular to fluid flow and caused by motion through a fluid?

Lift

What valid inference says that if the consequent is false, the antecedent must be false?

Denying the consequent

What is the ability for scientists to reach the same conclusion through repeated experiments?

Reproducibility

What is the amount of gravitational pull on an object?

Weight

What fallacy uses a word with two meanings in one argument?

Equivocation

What is 2702 in scientific notation?

2.702 × 10³

What is force per unit area?

Pressure

What factor is changed to test a hypothesis?

Independent variable

In engineering design, what is a required characteristic for a design to function?

Criteria

What is the upward force exerted by a fluid on an object?

Buoyancy

What is a conclusion based on reasoning from evidence?

Inference

What force is required to accelerate a 2000‑kg truck at 10 m/s²?

20,000 N

What law states that if pressure is constant, volume and temperature are directly proportional?

Charles's law

What is the science of shaping objects to reduce drag?

Streamlining

What measurement system was designed by French scientists to be simpler than FPS?

Metric system (SI)

What class of lever has input force between fulcrum and output?

Third‑class lever

What condition describes a submarine fully underwater but not sinking?

Neutral buoyancy

What is the falling velocity where air resistance equals weight?

Terminal velocity

What scalar quantity is distance traveled per unit time?

Speed

What is the formula for Newton's second law?

F = m × a

What is the formula for efficiency of a machine?

Efficiency = work output ÷ work input

What is the formula for density of an object?

Density = mass ÷ volume

What phenomenon causes a spinning cylinder or ball to create lift?

Magnus effect

What is the multiplication of input force under real conditions called?

Actual mechanical advantage (AMA)

What is any change in velocity called?

Acceleration

What is a tentative explanation for a scientific process?

Hypothesis

What is the amount of matter in an object?

Mass

What is the SI unit of work?

Joule

What state of matter has molecules that move freely but stay attracted?

Liquid

What is the ability of a gas to be compressed?

Compressibility

What is the phenomenon of liquid rising or falling in a thin tube?

Capillarity

What device measures pressure using an airtight metal box?

Aneroid barometer

What happens to an object immersed in water?

It appears to lose weight

What is the term for closeness to actual value?

Accuracy

What is Charles's law formula?

V₁/T₁ = V₂/T₂

What is Pascal's principle formula?

F₁/A₁ = F₂/A₂

What is Boyle's law formula?

P₁V₁ = P₂V₂

What is Amontons's law formula?

P₁/T₁ = P₂/T₂

Why does spilled water bead on a table?

Water coheres to itself and pulls back

Why does a shaken soda fizz or explode?

Pressure builds from gas inside the container

What are two controlled variables in the cat toy experiment?

His bedroom and the time of day

Why did the foam airplane suddenly fall?

It exceeded its critical angle of attack; lift stopped

What is the output force of a hydraulic press with small piston 2.0 cm², large piston 16 cm², and input force 4.0 N?

32 N

What is the new volume of a gas at 116.8 kPa if its volume was 4.0 L at 102.2 kPa?

3.5 L

P1 x V1= P2 x V2

What is the efficiency if work output is 630 J and input is 700 J?

90%

efficiency = Wo/Wi. 630/700

What is the car acceleration if velocity changes from 20 to 60 m/s in 10 s?

4.0 m/s²

60-20/10. Final velocity - initial velocity over time.