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Unit 1 - Lesson 1: Matter and its Characteristics
Unit 1 - Lesson 1: Matter and its Characteristics
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1
The colour property is a distinguishing factor between..........
table salt and flour.
oxygen and carbon dioxide.
iron and gold.
oxygen and nitrogen.
2
The property of electric conduction is a distinguishing factor between..........
iron and wood.
wood and plastic.
iron and copper.
no correct answer.
3
The taste property is a distinguishing factor between..........
silver and gold.
wood and plastic.
oxygen and nitrogen.
milk and honey.
4
The smell property is a distinguishing factor between...........
wood and plastic.
silver and iron.
iron and copper.
vinegar and perfume.
5
The density of a substance is a........... property.
physical
biological
no correct answer
chemical
6
Density of matter =.............
Mass + Volume
Mass x Volume
Mass ÷ Volume
Volume ÷ Mass
7
The volume of liquid is calculated from the relation..........
mass × density
mass + density
density ÷ mass
mass ÷ density
8
Density of red copper is 8.8 gm/cm³ means
the mass of 10 cm³ of red copper equals 8.8 gm.
the mass of the volume unit of red copper equals 0.8 gm.
the mass of the volume unit of red copper does not equal 8.8 gm.
the mass of the volume unit of red copper equals 8,8 gm.
9
The mass of water in gm is always....... its volume in cm³ (knowing that the density of water is 1 gm/cm³).
more than
less than
double
equal to
10
The density of a substance whose mass is 15 gm and occupies 30 cm³ is........... the density of water.
no correct answer
equal to
more than
less than
11
Equal masses of different substances have........... volumes.
similar
different
constant
equal
12
........... is from the substances that float on water surface.
Iron
Aluminum
Cork
Copper
13
When a substance sinks in water, this means that its density is......... the density of water.
more than
equal to
no correct answer
less than
14
A piece of metal, whose mass is 25 gm and its volume is 10 cm? When it is placed in water it will......... (water density I gm/cm³).
suspend.
sink.
dissolve.
float.
15
The mass of a piece of rock whose density is 2.8 gm/cm³ is 28 gm, so the density of 280 gm of it is......... gm/cm³
280
28
2.8
28.5
16
The density of petroleum oil is.......... that of water.
more than
equal to
no correct answer
less than
17
The balloons that are filled with helium gas in celebrations, rise up in air. because..........
density of helium is less than that of air.
no correct answer.
density of helium equals that of air.
density of helium is more than that of air.
18
............ gas is used in filling balloons of celebrations.
Nitrogen
Oxygen
Hydrogen
Neon
19
Heating coils are made up of.......... alloy.
chrome-copper
iron-copper
nickel-chrome
nickel-iron
20
.......... Used for fast cooking
Hearing coil
Electric wires
Electric screwdrivers
Pressure pans
21
Separation of components of petroleum oil depends on the difference in their............
melting points.
boiling points.
densities.
all of them.
22
All of the following substances conduct electricity except..........
iron.
wood.
aluminum.
copper.
23
Metals are characterized by their.........
all of the previous answers.
conductivity of electricity.
high melting point.
conductivity of heat.
24
All of the following substances are bad conductors of heat except...........
No correct answer
plastic.
iron.
wood.
25
All of the following solutions conduct electricity except.......... solution.
salt
sugary
acidic
alkaline
26
Among elements which has a great difficulty to react with oxygen of air is............
chromium.
aluminum.
potassium.
sodium.
27
The metal used to cover other substances which rapidly rust is..........
iron.
silver.
lead.
copper.
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