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University of Success School > BYJUS SCIENCE GRADE 6 > Flashcards

BYJUS SCIENCE GRADE 6 Flashcards

1
Q

The amount of matter in an object is known as?

A

Mass

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2
Q

The amount of space occupied by matter is known as?

A

Volume

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3
Q

The matter that expands to fill any container it is put into is known as?

A

Gas

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4
Q

The matter that flows and takes the shape of a container is known as?

A

Liquid

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5
Q

The matter that has a shape of its own is known as?

A

Solid

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6
Q

The nervous system is made up of ?

A

Brain

Spinal cord

Nerves

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7
Q

The control centre of the nervous system is the?

A

Brain

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8
Q

In animals the air is inhaled and exhaled through the?

A

Nose

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9
Q

Another name for wind pipe is the?

A

Trachea

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10
Q

The _______ directs the air into the lungs?

A

Trachea

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11
Q

The large organs that expand like balloons as they are filled with air i

are the?

A

Lungs

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12
Q

The digestion process begins in the ______ where food is chewed and mixed with saliva

A

Mouth

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13
Q

The _______ connects the mouth with the stomach

A

Esophagus

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14
Q

The _______contains an acid that breaks down the food?

A

Stomach

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15
Q

The ______ is a long tube where nutrients from the digested food pass into the blood?

A

Small intestine

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16
Q

The ________ mixes water with undigested food and makes it into waste

A

Large intestine

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17
Q

Name this great ape?

A

Orangutan

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18
Q

Name this wild animal

A

African wild dog

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19
Q

Name this great ape?

A

Chimpanzee

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20
Q

Name this animal?

A

Giant Panda

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21
Q

Name an instrument which can measure thinngs as small as 0.1 mm

A

Vernier Callipers

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22
Q

Name the perfect instrument to measure paper

A

Vernier Callipers

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23
Q

Is the earth itself a giant magnet

A

Yes

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24
Q

What is non contact force

A

Forces that do not require physical contact to act upon an object.

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25
Q

Give an example of a non contact force

A

Magnetic force

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26
Q

Are non metals usually non magnetic

A

Yes

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27
Q

Name a non metal that is magnetic

A

Liquid oxygen

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28
Q

Does silver jewellery get attracted to a magnet

A

No.
Even though silver (Ag) is a metal

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29
Q

What are magnets usually made up of

A

Iron Nickel and cobalt

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30
Q

Does your breakfast cereal have a magnetic material

A

Yes.
It contains Iron

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31
Q

Are all stainless steel magnetic

A

No

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32
Q

Name a stainless steel that is non magnetic

A

Austenitic

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33
Q

The naturally occuring magnet is called a

A

Lodestone

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34
Q

Name the farmer who accidentallay discovered the magnet

A

Magnes

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35
Q

Every magnet has how many poles

A

Two.
The North pole and the south pole

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36
Q

Is the magnetic North pole and the geographical north pole the same

A

No

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37
Q

The magnetic north pole points to which geographical pole

A

South pole

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38
Q

How can a magnet loose its magnetic property

A

By hammering it or heating it in a flame

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39
Q

What are meglev trains

A

Magnetically levitated trains

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40
Q

Why do Meglev trains travel very fast

A

Because they float above the tract and are not slowed by friction

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41
Q

What guides the migrating birds in their travels

A

The earths magnetic field

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42
Q

Does the magnetic poles of the earth flip directions

A

Yes.
The last time it flipped was 780000 years back

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43
Q

An object that emits light is called a

A

Luminous object

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44
Q

Why do plants appear green

A

Because they reflect green light and absorb all the other colours for photosynthesis

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45
Q

If you put a plant under green light, will it survive

A

Probably No

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46
Q

Red hot bodies give out light. Do cold bodies also give out light

A

Yes

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47
Q

Give examples of cold objects that give out light

A

Television screens
Laptop screens
Mobile screens

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48
Q

Lightning seen on earth is how hot as compared to the surface of the sun

A

5 times hotter

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49
Q

How do we see Non luminous objects

A

Non luminous objects reflect or bounce light into our eyes

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50
Q

Does light always travel in a straight line

A

Yes

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51
Q

Does light require a medium to travel

A

No

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52
Q

The largest source of light in the ocean is

A

Bioluminescence.
90% of all creatures who live 1500 feet below sea level are luminous

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53
Q

When is a body said to be stationary

A

When the sum of all the forces acting on it is Zero

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54
Q

What can a Force do to a body

A
  1. It can move the body
  2. It can Stop the body
  3. It can change the direction of the body
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55
Q

Which force acts on all objects nera the surface

A

Gravity

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56
Q

How can we stop a moving object.

A

By applying a force that is equal and opposite in direction

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57
Q

Heavier the object, greater is the force of Gravity acting on it.
TRUE or FALSE

A

True

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58
Q

What is Escape Velocity

A

The velocity needed for an object to escape the Earths Gravitational pull

59
Q

What is our Planets Escape Velocity

A

11.2 Km/sec

60
Q

Balanced Forces are applied to Stationary Objects.
TRUE or FALSE

A

True

61
Q

When a force is applied to a body, does the body have to me

A

No

62
Q

When you stand on a weighing machine are you measuring your mass or the force you exert on the Earth

A

Force you exert on the earth

63
Q

The force that acts between two bodies because of the roughness of the surface is called

A

Frictional Force

64
Q

Define WORK

A

In science work is said to be done when a force is exerted on an object and there is a change in position in the direction of the force

65
Q

Define MACHINE

A

A machine is a device that modifies the force applied on a body in magnitide and or direction

66
Q

What does a simple pulley do

A

It changes the direction of the force. It does not change the amount of work done

67
Q

Every machine has a LOAD :EFFORT ratio.
True or False

A

True

68
Q

The Load to Effort ratio of every machine always remains constant.
True or False

A

True

69
Q

The formula for mechanical advantage of a machine is

A

Effort

70
Q

The force applied on a machine is called

A

Load

71
Q

The force exerted by the machine is called

A

Effort

72
Q

What is efficiency of a machine

A

The ability of a machine to convert work done on it to useful work

73
Q

Is any machine 100% efficient

A

No

74
Q

Why are machines not 100% efficient

A

Because some energy is always lost

75
Q

The fixed poin on a lever is called

A

Fulcrum

76
Q

The three most important points on a lever are

A
  1. Fulcrum
  2. The point where force is applied
  3. The point where load is lifted
77
Q

The three types of levers are

A

First class, second class and thrid class levers

78
Q

What is a first class lever

A

The fulcrum lies between the load and effort

79
Q

What is a second class lever

A

The load lies between the fulcrum and the effort

80
Q

What is a third class lever

A

The effort lies between the fulcrum and the load

81
Q

Give three examples of a third class lever

A

Cricket bat
Fishing rod
Chopsticks

82
Q

What is the role of batteries and generators in an electric circuit

A

They maintain the flow of electrons in a circuit

83
Q

A spark of static electricity can be upto

A

3000 Volts

84
Q

Any material that does not obstruct the flow of electrons is known as a

A

Conductor

85
Q

The flow of electrons in a conductor is known as a

A

Current

86
Q

Is salt a bad conductor of electricity
True or false

A

False
Salt is a good conductor of electricity

87
Q

Air is a bad conductor of electricity
True or false

A

True

88
Q

Can electricity be conducted through a vaccum

A

NO

89
Q

A lightning bolt can reach upto what temperature

A

30000 Degree Celcius

90
Q

When you rub a comb on your hair what happens

A

Electrons from your hair are transferred to the comb and your negatively charged comb now attracts the positively charged pieces of paper.

91
Q

What happens when a woolen cloth is rubbed on the balloon

A

The elctrons from the baloon are transferred to the wollen cloth making the balloon positively charged

92
Q

Name the US president who first had electricity in the white house

A

Benjamin harrison the 23rd president

93
Q

What is the speed of an electron

A

80 cm/hour

94
Q

The elctricity in a copper wire travels as close to the speed of light in a vaccum
True or false

A

True

95
Q

Does water actually conduct electricity

A

NO

96
Q

What in the water makes it sometimes conduct electricity

A

The impurities in the water

97
Q

Organisms in the world are mainly classified as plants and animals. Give an exception to this rule

A

Viruses
They are neither plants or animals

98
Q

Give an unique property of the element Selenium

A

It conducts electricity when exposed to light and works as an insulator in the dark

99
Q

The measure of the amount of light that passes through an object is known as

A

Transparency

100
Q

If an object allows all the light that falls on it to pass through then that object is

A

Transparent

101
Q

If an object allows some of the light that falls on it to pass through it, this object is

A

Translucent

102
Q

If an object allows no light that falls on it to pass through, this object is

A

Opaque

103
Q

Are our eyelids thrasparent, translucent or opaque

A

Translucent

104
Q

Can an object be completely Transparent

A

Never

105
Q

When is a shadow formed

A

When light rays are blocked by an object

106
Q

Name a glass like plastic that is more transparent than glass

A

ACRYLIC

107
Q

A liquid that dissolves other substances is called a

A

Solvent

108
Q

The ability of a given substance to dissolve in a solvent is called

A

Solubility

109
Q

In the absence of food ,the body starts using ________________ to satisfy its energy needs

A

stored glucose

110
Q

The amount of energy we require depends upon ____

A

physical activites

111
Q

Activities like cycling ,running require
(average energy/high energy/low energy)

A

high energy

112
Q

When is National Food Day celebrated?

A

24th October

113
Q

Give the full form of CSPI

A

Center for Science in the Public Interest

114
Q

what is the name of stored glucose?

A

Glycogen

115
Q

name the two important sources of food

A

plants and animals

116
Q

A food chain starts with a ___________________

A

photosynthetic plant

117
Q

what are ingredients?

A

the different food items that are used to prepare a dish

118
Q

Name an ingredient that can be sourced from both plants as well as animals

A

oil example olive oil,cod liver oil

119
Q

What are inflorescent vegetables?

A

the flowers or flower buds of plants that are eaten as vegetables

120
Q

who are the producers in the food chain?

A

producers make their own food.
plants are producers

121
Q

Why is it said that carnivores obtain energy indirectly?

A

Carnivores eat other animals which feed on plants thus obtaining energy indirectly

122
Q

what is meant by staple food?

A

food that is consumed regularly by the people of a region is called the regions staple food

123
Q

what food do the north -indians consume?

A

wheat based food

124
Q

why do the south indians consume rice based food?

A

because of the ease of cultivating rice in the southern regions

125
Q

what are the requirements for the cultivation of rice?

A

A)higher rainfall
B)plain lands
C)Warm temperature

126
Q

Who invented popsicles?

A

Frank Epperson

127
Q

From which country are 70 % of the worlds spices obtained?

A

India

128
Q

name the nutrients we receive from food

A

proteins, carbohydrates, fats,,vitamins, minerals

129
Q

the energy we receive from food is measured in _________________________

A

calories

130
Q

what are nutrients ?

A

substances in food that provide the required energy to the body

131
Q

why do we need nutrients?

A

to carry out a variety of functions like
physical activities,
organ functions,,
even simple and complex brain activities

132
Q

why should fruits and vegetables be consumed in large amounts?

A

fruits and vegetables are good sources of carbohydrates ,fibre, vitamins ,minerals and water

133
Q

How can you evaluate the amount of calories in processed foods?

A

by checking its nutritional value present on the back of the box containing the food

134
Q

what happens when a person consumes more calories than what can be burnt by the body

A

the excess calories are stored as fat

135
Q

why do athletes who do lot of physical activities have to consume more calories

A

as their bodies burn calories a lot faster

136
Q

why do old people tend to consume fewer calories?

A

aa their metabolism is slow and it taes longer for their bodies to burn calories

137
Q

how are fats classified?

A

into unsaturated and saturated fats

138
Q

which fats are good for us?

A

monosaturated fats

139
Q

Name the fats that are bad for you

A

saturated fats and trans fats

140
Q

what is the function of monosaturaated fats

A

to prevent heart disease

141
Q

what are the disadvantages of saturated fats and transfats

A

likelihood of heart disease and obesity

142
Q

——————————- contains good monosaturated fats

A

avocado

143
Q

what does avocado contain?

A

vitamin C, E B6 and minerals such as iron,copper magnesium and twice as much potassium as banana

144
Q

Which are the nutrients present in desi ghee?

A

Vitamin A,D E and K

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