Combined Science Flashcards
1
Q
Where is DNA Stored in the sperm head.
A
In the top of the Sperm head.
2
Q
What do Chromosomes contain?
A
a substance called DNA and are carried in molecules
3
Q
Where are Genes foundinthecell
A
Nucleus
4
Q
What is the function of a cell wall
A
keeps the shape and used for support and protection
5
Q
Function of Nucleus
A
-Holds the DNA
-controls cell.
6
Q
Function of Mitochondria
A
provides energy for the cell
7
Q
Function of Cell membrane
A
Keeps structure
Control what goes in and out
8
Q
Function of Chloroplasts
A
Where photosynthesis happen.
9
Q
Function of Cytoplasm
A
Where chemical reactions happen
10
Q
What is the organ system made up of
A
Cells -> tissues -> organs -> organ system.
11
Q
What is Diffusion
A
Where particles go from a high concertation to a low concentration
12
Q
Function of heart
A
Pumps blood around your body as it beats. Sends oxygen around the body.
13
Q
Function of Fallopian tube
A
where egg is transferred into the uterus
14
Q
Function of Ovaries
A
Produce, store egg,
15
Q
function of utuerus
A
EGG implants itself in the lining of the uterus
16
Q
Function of Cervix
A
Sperm travel through
17
Q
Function of Vagina
A
Receives the penis during intercourse
18
Q
What is the heart
A
Organ for the Circulatory system
19
Q
What does the heart muscle do
A
Contracts forcing blood out of the chambers
20
Q
The left side has bigger muscles, why?
A
So it can pump blood to the rest of the body.
21
Q
Heart have____Chambers
A
4
22
Q
muscle tissue in the heart contracts…
A
TO pUsh blood through the heart and into blood vessels
23
Q
arteries are..
A
blood vessels
24
Q
Inhalation…
A
Diaphram contracts which makes make our lungs go out and up.
25
Exhalation...
Diaphram relaxes which makes our lungs go down and in.
26
What is it called when muscles and bones in our body work together
Biomechanics
27
When muscles contract they become..
Short and fat.
28
Antagonist means..
pairs where one muscle contracts and the other relaxes
29
Where can antagonist pairs be found
In our triceps and biceps.
30
What are drugs
Something you take, it affects the way our body works.
31
Types of Recreational drugs are..
Cocaine, heroine, cannabis, ecstasy
32
Recreation drugs are taken for..
Pleasure
33
What are stimulants drugs
Drugs that affect the nervous system, they carry impulses fast
34
Types of Stimulants
Caffeine, cocaine, alcohol
35
Depressants are..
Drugs that cause the nervous system to carry nerve impulses slower
36
What's a mixture..
Mixture of two substances
37
What is countinuous
Something that can be put into half numbers
38
What is discontinuous
Something that cannot be halved numbers
39
What happens to animals that do not adapt to their environment
They will die.
40
Carbohydrates are
an energy source
41
Lipids are..
an energy source
42
Proteins are..
used for growth and repair of tissues
43
Vitamins are
helpful to prevent deficiency diseases
44
MRS GREN
Movement
Respiration
Sensitivity
Growth
Reproduction
Excruetion
Nutrion
45
Fibre helps..
avoid constipation
46
Evoultion is where..
Things change over time
47
Digestive system is responsible for..
breaking down large insolubule molecules
48
Enzymes help
chemically break down food
49
The mouth is responsible for..
breaking down food
50
The oesophagus...
transports food from the mouth to the stomach
51
In the large intestines...
water absorption happens
52
In the rectum...
faeces is stored
53
3 types of enzymes
Amylase
Protease
Lipase
54
What happens in the Gas Exchange in the lungs
Deoxygenated blood arrives at the lungs from the heart the lungs supply oxygen to the blood and then the blood goes to the heart in the pulmonary vein
55
What can you use to see information about waves
Oscilloscope
56
what is a Wavelength
Distance between a point of a wave to the same point on the next wave
57
What is the Peak or crest
Top of a wave
58
Trough
Bottom of a wave
59
Amplitude
Distance from the middle to the crest or trough of the wave
60
what is the Frequency
Number of waves that travel past a single point every second.
61
What do waves transfer
Energy
62
Longitude waves travel on?
Solids
63
Transverse waves travel through?
Liquids
64
Wave speed is calculated using the equation...
Wave speed = frequency x wavelength
65
What earthquake wave shakes the earth?
Transverse S waves
66
What do S waves stand for
Secondary
67
Distance =
speed x time
68
What does sound travel fasted through
Solids
69
Reverberation is
a repeated echo
70
What is the medium
A material that sound can travel through
71
What are infrasound's
Sound waves with a frequency below the lower limit of human audibility
72
Ultrasound uses are
Used to scan an unborn baby during pregnancy
73
What is the outer ear made of
Pinna
Ear Canal
Ear drum
74
What is the middle ear made of
Hammer
Anvil
Stirrup
75
What can translucent objects do to light
Scatter light so not all the light is transmitted
76
What happens if light is reflected from a rough surface
Diffuse scattering
77
The law of reflection states:
The angle of incidence equals the angle of reflection
78
The law of reflection states:
The angle of incidence equals the angle of reflection
79
What must light rays have
an arrow on the light ray to show the direction of the light
80
which angle is the angle of refraction
The angle measured from the normal to the ray
81
What is the cornea
Transparent outside layer of the eye
82
What is the pupil
Where light enters
83
What is the iris
A muscle that controls the size of the pupil
84
What is the lens
Able to to change the shape
85
What is the retina
Back of the eye where light is focused
86
What is the optic nerve
A nerve that connects the eye to the brain
87
Which way does light bend as it enters a new medium and slows down
Towards the normal
88
Why does light refract
As it hits a new medium, the speed changes and direction depending on the density of the material or what angle the light hits the medium
89
Which parts of the eye refracts light
Cornea and the lens
90
Why does light look white
Because its a mixture of all the colours
91
What can we use to separate white light into colours
A prism
92
What are the three primary colors of light?
Green red blue
93
Sound is a __________ wave
longitudinal
93
Sound is a __________ wave
longitudinal
94
What are amplitude measured in
Metres/Decibels
95
What is a resistor
A component which can limit the current that flows through it
96
What is a ammeter used for
to measure currents
97
Which way does conventional current flow
from the positive terminal to the negative terminal
98
which way do electrons flow in a circuit
to a positive to a negative terminal
99
What happens in condensation
gas -> liquid
100
Melting is
solid -> liquid
101
Evaporation is
liquid to gas
102
difference between evaporation and boiling
Evaporation can happen at any temperature
103
Boiling is,,
liquid to gas
104
Freezeing is
Liquid to solid
105
Diffusion is where...
Particles go from an are of high concentration to a lower concentration
106
What happens if we increase the temperature of gas in a fixed volume
Pressure will increase
107
what does a increase of temperature lead to?
higher kinetic energy
108
What does distillation do
separates 2 liquids
109
Acids is a group of...
chemicals
110
Alkalis are
a group of chemicals
111
Indicators are..
a type of chemical that will turn a different colour in acid or alkali conditions
112
Litmus paper can..
can change colors to tell you whether you have an acid or alkali
113
what is a element
a substance which contains only one kind of atom
114
Compounds are
atoms joined together
