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WorksheetsQ4 MCA Physical Science Prep
Total questions: 25
Worksheet time: 6hrs 15mins
What is density?
The amount of matter in a given space
Volume times mass
A high density object is likely to contain
More particles in a small amount of space
Fewer particles in a large amount of space
Look at the picture. Which layer is more dense, honey or baby oil?
Honey
Baby oil
A solute _____ in a solvent to make a solution
dissolves
precipitates
crystallizes
A solution that contains more of a solute will have a ____ concentration.
higher
lower
Which is an example of diffusion?
How drops of food coloring spread out in a beaker of water
How pebbles sit at the bottom of a beaker of water
When a spring is compressed, it is
Pushed together
Pulled apart
When a gas is compressed into a smaller space, the pressure
Increases
Decreases
Thermal expansion happens:
When the volume of a substance goes up with temperature
When the volume of a substance goes down with temperature
What is the simplest form of a pure substance?
Element
Compound
Mixture
Which is an example of a compound?
Gallium
NaCl
stainless steel
Which food is an example of a heterogeneous mixture?
pizza
honey
Which element is an example of a nonmetal?
helium
copper
What is the product of the reaction between sodium metal and chlorine gas?
sodium chloride (table salt)
chlorodium metal
Which process is an example of a physical change?
Sublimation
Combustion
Oxidation
The products of a chemical reaction have the same mass as the sum of the reactants. This is because ____ is conserved.
Mass
Momentum
Energy
The particles of an object in the liquid state are ______ than those in the solid state.
packed tighter
more able to slip past each other
Which is an example of a chemical change?
Baking
Shredding
Freezing
Which has a higher pH, soap or vinegar?
Soap
Vinegar
Soap turns red litmus paper blue and has a pH between 9 and 10. Soap is a(n)
acid
base
How is speed calculated?
distance / time
time x distance
What goes on the x-axis of a distance-time graph?
distance
time
When the push or pull is equal but in opposite directions, the forces are balanced. Balanced forces ____.
cause motion
do not cause a change in motion
Which force DOES NOT ACT at a distance?
magnetic
friction
gravitational
Which electromagnetic waves have the highest energy?
gamma rays
radio waves
visible light
