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WorksheetsPhysical Science
Total questions: 23
Worksheet time: 23mins
Name
Class
Date
1.
Which of the following is evidence that an electrical current produces a magnetic field?
a)
Iron filings reveal magnetic field lines around an electrical wire.
b)
A magnet moved through a coil of electrical wire produces a current.
c)
Electrical wires have a positive (+) and negative (-) poles just as a bar magnet does.
d)
The magnetic field lines run east and west in a bar magnet, but they run north and south in a coil of wire.
2.
How does the mass of a jigsaw puzzle compare when the pieces are together or separated?
a)
The mass is greater when the pieces are together.
b)
The mass is greater when the pieces are separated.
c)
The mass is the same whether the pieces are together or separated.
d)
The mass of each piece is proportional to the total, so the mass of the complete puzzle can be calculated.
3.
Which of the following is NOT a physical change that happens when water changes state?
a)
water boils
b)
water freezes
c)
ice sinks
d)
ice melts
4.
What kind of change occurs when gaseous nitrogen becomes very cold and changes to a liquid?
a)
physical
b)
chemical
c)
both chemical and physical
d)
neither chemical not physical
5.
Of these categories of materials, which would NOT make a good insulator?
a)
plastics
b)
metals
c)
rubber tubing
d)
cotton cloth
6.
Which of the following demonstrates static electricity?
a)
You know you should never put your fingers into an electrical outlet. You could get shocked.
b)
You bend a paper clip back and forth until it breaks. The broken ends feel hot.
c)
You brush your hair on a cold, dry day. Your hair springs away from your head in all different directions.
d)
You use a charger to charge batteries for a digital camera.
7.
A scientist burns a known mass of liquid fuel with a known mass of oxygen inside a sealed container. The liquid fuel disappears, but the mass of the container does not change. Which of the following BEST explains the result?
a)
A chemical change formed products of less mass.
b)
A chemical reaction formed gaseous products.
c)
A physical change vaporized the fuel.
d)
A physical change turned the fuel and the oxygen into a new compound.
8.
You weigh 1 ounce of cheese on a kitchen scale. You grate the cheese and put it on your salad. Predict the weight of the cheese after grating, assuming you don't leave any on your knife, grater, or cutting board.
a)
The weight of the grated cheese will be 1 ounce.
b)
The weight of the grated cheese will be greater than 1 ounce.
c)
The weight of the grated cheese will be less than 1 ounce.
d)
The weight of the grated cheese cannot be predicted, because a physical change has occured.
9.
Water is a compound H20. What are its smallest parts in water vapor?
a)
molecules of H20
b)
atoms of H and atoms of O
c)
drops of liquid water, H20
d)
charged elements of hydrogen and oxygen
10.
What would you expect to find inside an electromagnet?
a)
a permanent magnet
b)
a coil of wire
c)
two bar magnets
d)
a device that uses electricity
11.
Which of the following requires the strongest microscope to be seen?
a)
compound
b)
molecule
c)
atom
d)
element
12.
A breeze makes a forest fire burn faster. Why?
a)
Air is both flammable and combustible.
b)
Air causes a physical change in the wood of the burning trees.
c)
More gases become involved, so several additional chemical changes occur.
d)
More oxygen is supplied to the chemical reaction.
13.
Which of the following is the BEST choice for conducting electricity through a circuit?
a)
pencil lead (graphite)
b)
plastic cord
c)
copper wire
d)
wool yarn
14.
Which of the following actions will NOT help you separate a mixture?
a)
heating
b)
filtering
c)
cutting
d)
evaporating
15.
What will happen to a glass of ice water left on a counter on a hot summer day?
a)
The temperature of the water will fall, causing it to freeze.
b)
More ice will form as the temperature of the water falls.
c)
The ice will melt as the temperature of the water rises.
d)
The ice will prevent the temperature of the water from changing.
16.
Which of the following is NOT an example of static electricity?
a)
Papers coming out of a photocopier sticking together.
b)
A photocopier has a light that moves across a glass plate.
c)
The toner in a photocopier sticks to charged spots on the paper.
d)
You get a shock when you walk across a carpet and then touch a photocopier.
17.
What is the biggest difference between water particles in liquid water and water particles in solid ice?
a)
The particles have different chemical compositions.
b)
The particles are closer together in ice.
c)
The water particles move faster in ice.
d)
The particles carry an opposite electrical charge in ice than in water.
18.
You break a china cup. You put its pieces back together again with glue. Predict the mass of the repaired cup.
a)
It will be less than the mass of the unbroken cup.
b)
It will be greater than the mass of the unbroken cup because of the glue.
c)
It will equal the mass of the unbroken cup.
d)
The two masses cannot be compared because the physical change has occurred.
19.
What kind of material should you choose if you want to stop the flow of an electrical current?
a)
enchancer
b)
inhibitor
c)
conductor
d)
insulator
20.
If an increase or decrease in temperature is large enough, it can cause
a)
a loss of mass
b)
an electrostatic discharge
c)
a transfer of electrons
d)
a change of state
21.
Rubber is to insulator as
a)
copper is to conductor
b)
plastic is to conductor
c)
steel is to cotton
d)
cotton is to plastic
22.
Which of the following is NOT a chemical change?
a)
cookie dough bakes
b)
toast burns
c)
bread is cut
d)
popcorn pops
23.
To make a chocolate cake, a baker mixes 250 grams of flour, 50 grams of cocoa powder, and 100 grams of sugar. What is the mass of the dry ingredients of the cake?
a)
100 grams
b)
200 grams
c)
300 grams
d)
400 grams
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