Worksheets9th Grade- 2nd Semester Test Review
Total questions: 20
Worksheet time: 10mins
Which of the barbells in Figure 6-1A has the most inertia?
The 10-kg barbell
The 20-kg barbell
The 30-kg barbell
They all have the same inertia
Ch. 6: A 20-kg dog on ice skates is accelerating at 2 m/s2. What is the net force on the dog? (F=ma)
2 N
10 N
22 N
40 N
Ch. 7: What provides most of Earth’s energy for living things and technology?
Oil and gas
The Sun
Gravity
Mars
Ch. 7: Which type of energy does a stretched spring contain?
Radiant energy
Electrical energy
Chemical energy
Elastic energy
Ch. 8 & 9: Which of the following improves the efficiency of a machine?
Reducing friction
Adding more energy
Running it faster
Increasing friction
Ch. 8 & 9: Which of the following levers has the largest mechanical advantage?
Lever A
Lever B
Lever C
All three levers have the same mechanical advantage
Ch. 8 & 9: In the picture of the crowbar, which letter shows the fulcrum?
A
B
C
None of these are a fulcrum
Ch. 10: Physical properties used to indicate temperature changes include all of the following EXCEPT:
color changes of liquid crystals
volume changes of fluids and solids
changes in electrical resistance
odor changes in solids
Ch. 10: List the phases of water in order, from the phase with the slowest molecular movement to the phase with the fastest molecular movement.
Gas-Liquid-Solid
Liquid-Solid-Gas
Solid-Liquid-Gas
Gas-Solid-Liquid
Ch. 11 & 12: When you put ice in a drink to cool it:
coldness is transferred from the ice to the warmer drink.
heat is transferred from the warmer drink to the cooler ice.
heat from the ice is lost to the warmer liquid around it.
the ice cracks and releases cold air molecules that cool off the drink.
Ch. 11 & 12: The type of heat transfer called convection happens as a result of:
electromagnetic waves.
the direct contact of particles in a substance.
the actual motion of a fluid in the form of currents.
All of the above
Ch. 11 & 12: Matter that flows when force is applied is:
gas only.
liquid only.
solid only.
fluid.
Ch. 13: What substance in our atmosphere has been significantly reduced by the process of photosynthesis?
Hydrogen
Oxygen
Carbon dioxide
Glucose
Ch. 13: A hot air balloon will rise in air because:
the volume of air inside the balloon is less than the volume of air outside the balloon
the mass of the air inside the balloon is less than the mass of the air outside the balloon
the density of air inside the balloon is less than the density of air outside the balloon.
the temperature of the air rises as the balloon gets closer to the Sun
Ch. 14 & 15: Protons and neutrons in the nucleus are held together by:
gravity.
electromagnetic force.
the strong nuclear force.
the weak force.
Ch. 14 & 15: Characteristics of non-metals include all of the following EXCEPT:
ductile.
brittle.
poor conductors.
dull.
Ch. 14 & 15: The second row of the periodic table has 8 elements because:
there are 8 protons in the nucleus of oxygen.
the second energy level can hold 8 electrons.
the first row has 7 elements and the third row has 9 elements.
8 is 2 × 2 × 2.
Ch. 16: Groups of atoms held together by covalent bonds are called:
molecules.
elements.
mixtures.
alloys.
Ch. 16: The Mg atom becomes the ion, Mg2+, when it:
gains 2 electrons.
loses 2 electrons.
gains 2 protons.
loses 2 protons.
Ch. 16: ____ are energy-rich compounds, such as starch, glucose, and sucrose.
Proteins
Acids
Carbohydrates
Water molecules
