BYJUS SCIENCE GRADE 6 Flashcards
1
Q
The amount of matter in an object is known as?
A
Mass
2
Q
The amount of space occupied by matter is known as?
A
Volume
3
Q
The matter that expands to fill any container it is put into is known as?
A
Gas
4
Q
The matter that flows and takes the shape of a container is known as?
A
Liquid
5
Q
The matter that has a shape of its own is known as?
A
Solid
6
Q
The nervous system is made up of ?
A
Brain
Spinal cord
Nerves
7
Q
The control centre of the nervous system is the?
A
Brain
8
Q
In animals the air is inhaled and exhaled through the?
A
Nose
9
Q
Another name for wind pipe is the?
A
Trachea
10
Q
The _______ directs the air into the lungs?
A
Trachea
11
Q
The large organs that expand like balloons as they are filled with air i
are the?
A
Lungs
12
Q
The digestion process begins in the ______ where food is chewed and mixed with saliva
A
Mouth
13
Q
The _______ connects the mouth with the stomach
A
Esophagus
14
Q
The _______contains an acid that breaks down the food?
A
Stomach
15
Q
The ______ is a long tube where nutrients from the digested food pass into the blood?
A
Small intestine
16
Q
The ________ mixes water with undigested food and makes it into waste
A
Large intestine
17
Q
Name this great ape?
A
Orangutan
18
Q
Name this wild animal
A
African wild dog
19
Q
Name this great ape?
A
Chimpanzee
20
Q
Name this animal?
A
Giant Panda
21
Q
Name an instrument which can measure thinngs as small as 0.1 mm
A
Vernier Callipers
22
Q
Name the perfect instrument to measure paper
A
Vernier Callipers
23
Q
Is the earth itself a giant magnet
A
Yes
24
Q
What is non contact force
A
Forces that do not require physical contact to act upon an object.
25
Give an example of a non contact force
Magnetic force
26
Are non metals usually non magnetic
Yes
27
Name a non metal that is magnetic
Liquid oxygen
28
Does silver jewellery get attracted to a magnet
No.
Even though silver (Ag) is a metal
29
What are magnets usually made up of
Iron Nickel and cobalt
30
Does your breakfast cereal have a magnetic material
Yes.
It contains Iron
31
Are all stainless steel magnetic
No
32
Name a stainless steel that is non magnetic
Austenitic
33
The naturally occuring magnet is called a
Lodestone
34
Name the farmer who accidentallay discovered the magnet
Magnes
35
Every magnet has how many poles
Two.
The North pole and the south pole
36
Is the magnetic North pole and the geographical north pole the same
No
37
The magnetic north pole points to which geographical pole
South pole
38
How can a magnet loose its magnetic property
By hammering it or heating it in a flame
39
What are meglev trains
Magnetically levitated trains
40
Why do Meglev trains travel very fast
Because they float above the tract and are not slowed by friction
41
What guides the migrating birds in their travels
The earths magnetic field
42
Does the magnetic poles of the earth flip directions
Yes.
The last time it flipped was 780000 years back
43
An object that emits light is called a
Luminous object
44
Why do plants appear green
Because they reflect green light and absorb all the other colours for photosynthesis
45
If you put a plant under green light, will it survive
Probably No
46
Red hot bodies give out light. Do cold bodies also give out light
Yes
47
Give examples of cold objects that give out light
Television screens
Laptop screens
Mobile screens
48
Lightning seen on earth is how hot as compared to the surface of the sun
5 times hotter
49
How do we see Non luminous objects
Non luminous objects reflect or bounce light into our eyes
50
Does light always travel in a straight line
Yes
51
Does light require a medium to travel
No
52
The largest source of light in the ocean is
Bioluminescence.
90% of all creatures who live 1500 feet below sea level are luminous
53
When is a body said to be stationary
When the sum of all the forces acting on it is Zero
54
What can a Force do to a body
1. It can move the body
2. It can Stop the body
3. It can change the direction of the body
55
Which force acts on all objects nera the surface
Gravity
56
How can we stop a moving object.
By applying a force that is equal and opposite in direction
57
Heavier the object, greater is the force of Gravity acting on it.
TRUE or FALSE
True
58
What is Escape Velocity
The velocity needed for an object to escape the Earths Gravitational pull
59
What is our Planets Escape Velocity
11.2 Km/sec
60
Balanced Forces are applied to Stationary Objects.
TRUE or FALSE
True
61
When a force is applied to a body, does the body have to me
No
62
When you stand on a weighing machine are you measuring your mass or the force you exert on the Earth
Force you exert on the earth
63
The force that acts between two bodies because of the roughness of the surface is called
Frictional Force
64
Define WORK
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
Define MACHINE
A machine is a device that modifies the force applied on a body in magnitide and or direction
66
What does a simple pulley do
It changes the direction of the force. It does not change the amount of work done
67
Every machine has a LOAD :EFFORT ratio.
True or False
True
68
The Load to Effort ratio of every machine always remains constant.
True or False
True
69
The formula for mechanical advantage of a machine is
Load
----------
Effort
70
The force applied on a machine is called
Load
71
The force exerted by the machine is called
Effort
72
What is efficiency of a machine
The ability of a machine to convert work done on it to useful work
73
Is any machine 100% efficient
No
74
Why are machines not 100% efficient
Because some energy is always lost
75
The fixed poin on a lever is called
Fulcrum
76
The three most important points on a lever are
1. Fulcrum
2. The point where force is applied
3. The point where load is lifted
77
The three types of levers are
First class, second class and thrid class levers
78
What is a first class lever
The fulcrum lies between the load and effort
79
What is a second class lever
The load lies between the fulcrum and the effort
80
What is a third class lever
The effort lies between the fulcrum and the load
81
Give three examples of a third class lever
Cricket bat
Fishing rod
Chopsticks
82
What is the role of batteries and generators in an electric circuit
They maintain the flow of electrons in a circuit
83
A spark of static electricity can be upto
3000 Volts
84
Any material that does not obstruct the flow of electrons is known as a
Conductor
85
The flow of electrons in a conductor is known as a
Current
86
Is salt a bad conductor of electricity
True or false
False
Salt is a good conductor of electricity
87
Air is a bad conductor of electricity
True or false
True
88
Can electricity be conducted through a vaccum
NO
89
A lightning bolt can reach upto what temperature
30000 Degree Celcius
90
When you rub a comb on your hair what happens
Electrons from your hair are transferred to the comb and your negatively charged comb now attracts the positively charged pieces of paper.
91
What happens when a woolen cloth is rubbed on the balloon
The elctrons from the baloon are transferred to the wollen cloth making the balloon positively charged
92
Name the US president who first had electricity in the white house
Benjamin harrison the 23rd president
93
What is the speed of an electron
80 cm/hour
94
The elctricity in a copper wire travels as close to the speed of light in a vaccum
True or false
True
95
Does water actually conduct electricity
NO
96
What in the water makes it sometimes conduct electricity
The impurities in the water
97
Organisms in the world are mainly classified as plants and animals. Give an exception to this rule
Viruses
They are neither plants or animals
98
Give an unique property of the element Selenium
It conducts electricity when exposed to light and works as an insulator in the dark
99
The measure of the amount of light that passes through an object is known as
Transparency
100
If an object allows all the light that falls on it to pass through then that object is
Transparent
101
If an object allows some of the light that falls on it to pass through it, this object is
Translucent
102
If an object allows no light that falls on it to pass through, this object is
Opaque
103
Are our eyelids thrasparent, translucent or opaque
Translucent
104
Can an object be completely Transparent
Never
105
When is a shadow formed
When light rays are blocked by an object
106
Name a glass like plastic that is more transparent than glass
ACRYLIC
107
A liquid that dissolves other substances is called a
Solvent
108
The ability of a given substance to dissolve in a solvent is called
Solubility
109
In the absence of food ,the body starts using ________________ to satisfy its energy needs
stored glucose
110
The amount of energy we require depends upon ____
physical activites
111
Activities like cycling ,running require
(average energy/high energy/low energy)
high energy
112
When is National Food Day celebrated?
24th October
113
Give the full form of CSPI
Center for Science in the Public Interest
114
what is the name of stored glucose?
Glycogen
115
name the two important sources of food
plants and animals
116
A food chain starts with a ___________________
photosynthetic plant
117
what are ingredients?
the different food items that are used to prepare a dish
118
Name an ingredient that can be sourced from both plants as well as animals
oil example olive oil,cod liver oil
119
What are inflorescent vegetables?
the flowers or flower buds of plants that are eaten as vegetables
120
who are the producers in the food chain?
producers make their own food.
plants are producers
121
Why is it said that carnivores obtain energy indirectly?
Carnivores eat other animals which feed on plants thus obtaining energy indirectly
122
what is meant by staple food?
food that is consumed regularly by the people of a region is called the regions staple food
123
what food do the north -indians consume?
wheat based food
124
why do the south indians consume rice based food?
because of the ease of cultivating rice in the southern regions
125
what are the requirements for the cultivation of rice?
A)higher rainfall
B)plain lands
C)Warm temperature
126
Who invented popsicles?
Frank Epperson
127
From which country are 70 % of the worlds spices obtained?
India
128
name the nutrients we receive from food
proteins, carbohydrates, fats,,vitamins, minerals
129
the energy we receive from food is measured in _________________________
calories
130
what are nutrients ?
substances in food that provide the required energy to the body
131
why do we need nutrients?
to carry out a variety of functions like
physical activities,
organ functions,,
even simple and complex brain activities
132
why should fruits and vegetables be consumed in large amounts?
fruits and vegetables are good sources of carbohydrates ,fibre, vitamins ,minerals and water
133
How can you evaluate the amount of calories in processed foods?
by checking its nutritional value present on the back of the box containing the food
134
what happens when a person consumes more calories than what can be burnt by the body
the excess calories are stored as fat
135
why do athletes who do lot of physical activities have to consume more calories
as their bodies burn calories a lot faster
136
why do old people tend to consume fewer calories?
aa their metabolism is slow and it taes longer for their bodies to burn calories
137
how are fats classified?
into unsaturated and saturated fats
138
which fats are good for us?
monosaturated fats
139
Name the fats that are bad for you
saturated fats and trans fats
140
what is the function of monosaturaated fats
to prevent heart disease
141
what are the disadvantages of saturated fats and transfats
likelihood of heart disease and obesity
142
------------------------------- contains good monosaturated fats
avocado
143
what does avocado contain?
vitamin C, E B6 and minerals such as iron,copper magnesium and twice as much potassium as banana
144
Which are the nutrients present in desi ghee?
Vitamin A,D E and K
