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WorksheetsS5P1/2/3- Physical Science Part B
Total questions: 26
Worksheet time: 22mins
Name
Class
Date
1.
Which of the following is a physical change?
a)
An air compressor squeezes air into a small space.
b)
An electric heater gets so hot that it burns out.
c)
A generator burns gasoline and produces electricity.
d)
A lawnmower stops when its blade is clogged with grass.
2.
Ms. Langford made a salad in a bowl. The total mass was 250 grams. The lettuce was 75 grams, tomatoes 30 grams, carrots 20 grams, and onions 15 grams. What was the mass of the bowl?
a)
110 grams
b)
140 grams
c)
250 grams
d)
390 grams
3.
Which of the following BEST demonstrates static electricity?
a)
A wet object that touches a railroad track on a very cold day will freeze in place on the track.
b)
As a train draws nearer to a listener, its sound seems to rise in pitch.
c)
The brakes of a train squeal as the train comes into the station.
d)
A passenger feels a shock when he hands his ticket to the conductor on a train.
4.
How can you find the mass of air inside an air-filled balloon?
a)
Find the mass of the air-filled balloon. Replace the air with helium and find the new mass. Subtract to find the difference.
b)
Add air to the balloon until it bursts. Then find the mass and volume of the stretched balloon.
c)
Find the mass of the balloon. Multiply that mass by the density of the air.
d)
Find the mass of the balloon with the air in it. Let out the air and find the mass of the empty balloon. Subtract to find the difference.
5.
The drops of water that form on the outside of a cold glass on a hot day are an example of
a)
a chemical change.
b)
a physical change.
c)
both a chemical and a physical change.
d)
neither a chemical nor a physical change.
6.
You observe a puddle of water after a rain storm. What happens to the tiny particles of water as the puddle evaporates?
a)
They move more slowly.
b)
They move farther apart.
c)
They move closer together.
d)
They get smaller.
7.
What causes the blinking lights of fireflies on a hot summer day?
a)
physical change
b)
chemical change
c)
both physical and chemical change
d)
neither physical nor chemical change
8.
In which of the following ways are an electromagnet and a bar magnet alike?
a)
They both carry a current.
b)
They attract each other.
c)
They both generate electricity.
d)
Both have magnetic fields.
9.
Plastic is a good insulator. What's the BEST place to use it in an electrical current?
a)
around wires, to keep electricity from leaving the wire
b)
in switches, to turn electricity on and off
c)
in bulbs, to make the brightest possible light
d)
in batteries, to make them last longer
10.
Which of the following masses could NOT be cut from a single, 100-gram mass?
a)
four pieces with masses of 25 grams each
b)
three pieces with masses of 30 grams each
c)
three pieces with masses of 10, 20, and 70 grams
d)
four pieces with masses of 20, 30, 40, and 50 grams
11.
Which of the following is NOT evidence of a chemical change?
a)
release of heat energy
b)
gain or loss of mass
c)
change in volume
d)
color change
12.
A farmer scrapes rust off a corroded pipe. Is this a physical change?
a)
No, because the pipe will rust again after a while.
b)
No, because cleaning the pipe changes its chemical composition.
c)
Yes, because the rust and iron are separated.
d)
Yes, because the rust is a compound of iron and oxygen.
13.
Among these pairs of materials, which are both conductors?
a)
copper and rubber
b)
plastic and aluminum
c)
copper and aluminum
d)
aluminum and cardboard
14.
A magician mixes two colorless liquids. The mixture turns bright pink. What kind of change has the magician performed?
a)
physical
b)
chemical
c)
flammable
d)
combustible
15.
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 a physical change has occurred.
16.
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 in ice are vibrating in place.
c)
The particles move faster in ice.
d)
The particles carry an opposite electrical charge in ice than in water.
17.
You cut a 600-gram mass into five equal pieces. What is the mass of each piece?
a)
120 grams
b)
600 grams
c)
3,000 grams
d)
575 grams
18.
What kind of magnet carries a current?
a)
permanent magnet
b)
electromagnet
c)
bar magnet
d)
horseshoe magnet
19.
You set wet steel wool in the air to cause a chemical reaction. Which are you MOST likely to see after the reaction?
a)
The steel wool evaporates.
b)
The steel wool explodes.
c)
The steel wool gets colder and becomes harder.
d)
The steel wool turns reddish and becomes brittle.
20.
Why can you hold an electric toothbrush without getting shocked?
a)
The toothbrush uses only a little electric current.
b)
The plastic case is an insulator.
c)
Your hands are poor conductors of electricity.
d)
You don't keep the toothbrush running long enough for a static charge to build up.
21.
A child uses 55 interlocking plastic blocks to build a model rocket. Each block has a mass of 12 grams. What is the mass of the rocket?
a)
43 grams
b)
67 grams
c)
550 grams
d)
660 grams
22.
When placed side by side, two balloons stay where they are placed. They do not move any closer together. They do not move any farther apart. What is the BEST explanation?
a)
They have the same charge.
b)
They have mixed charges.
c)
They are uncharged.
d)
They have opposite charges.
23.
When hydrogen and oxygen gas react, they explode and form water. What kind of change is that?
a)
physical
b)
chemical
c)
both physical and chemical
d)
neither physical nor chemical
24.
On a hot summer day, Jose leaves an air-conditioned building and goes outside. His glasses fog up. Why?
a)
A chemical change releases water vapor from his glasses because of the heat.
b)
A physical change causes the formation of water vapor in the air.
c)
A physical change causes water vapor to change to liquid water on his cold glasses.
d)
The warming of his glasses causes a chemical reaction with the water vapor in the air.
25.
Look at how the two balloons repel each other. What is the BEST explanation?
a)
They have opposite charges.
b)
They have mixed charges.
c)
They are uncharged.
d)
They have to same charge.
26.
A student takes the mass of a whole orange. He cuts up the orange and measure its mass again. What is TRUE of the orange's mass before and after it was cut up?
a)
It was greater when it was whole.
b)
It is greater when it is in pieces.
c)
It is the same whole or cut up.
d)
It is less when it is a whole.
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