Y8 Synoptic Revision Flashcards
Name 5 Food Groups
Carbohydrates, Fats, Proteins, Minerals, Vitamins
Which organ system breaks down food and absorbs it into the blood?
Digestive System
Name 3 organs in the digestive that food passes through
Mouth, Oesophagus, Stomach, Small Intestine, Large intestine
Name 2 organs that are part of the digestive system that food does not pass through
Pancreas, Liver, Gall Bladder
Describe what role enzymes play in digestion
They break down large molecules such as starch into smaller molecules so that they can be absorbed into the bloodstream.
Why is protein important in a healthy diet?
Proteins are used for growth and repair
Arteries carry blood __________ from the heart
Away
Veins carry blood __________ the heart
Towards
The body system that delivers oxygen and glucose to your cells is called the …………………………. system
Circulatory
What is the word equation for aerobic respiration?
Glucose+Oxygen —> Carbon dioxide+ Water + ‘Energy’
What substance, produced during anaerobic respiration can cause cramp?
Lactic acid
Put these organs into the order in which air passes through them during breathing in: Alveoli, Nose, Bronchi, Trachea, Bronchioles
Nose, Trachea, Bronchi, Bronchioles, Alveoli
Name 3 harmful substances in cigarette smoke.
Tar, Nicotine, Carbon monoxide
The male sex cell (gamete) is called ……………
Sperm
The female sex cell (gamete) is called ………………
Egg or Ovum
When the nucleus of a sperm cell joins with the nucleus of an egg cell this is called……………………
Fertilisation
After fertilisation the fertilized egg divides to become a ball of cells called the ………………………….
Embryo
The organ that attaches the foetus to the uterus lining is called ………………………..
The placenta
An average human pregnancy lasts………..
9 months
The 3 states of matter are…….
Solids, Liquids & Gases
What is the name given to the way that heat travels through solids (especially metals)?
Conduction
Which method of heat transfer involves a hot liquid or gas becoming less dense and rising?
Convection
Materials which do not allow heat energy to travel through them easily are called …………………………..
Thermal insulators
What is an element?
An element is a substance that only contains one type of atom.
What is the difference between a mixture and a compound?
In a compound the different types of atom are chemically joined, whereas in a mixture they are not.
Air is an example of a
Mixture
Sodium Chloride is an example of a
Compound
The _________________ lists all the elements in order of atomic number
Periodic Table
Sand and water are best separated by which method?
Filtering
Salt can be obtained from sea water by which method?
Evaporation
Pure water can be obtained from sea water by which process?
Distillation
Coloured dyes can best be separated using which process?
Chromatography
An acid has a pH that is
Lower than 7
An alkali has a pH that is
Higher than 7
An object that produces light is called …………..
Luminous
An object that does not allow light to pass through it is called …………
Opaque
An object which allows light through so that a clear image can be seen is called ………….
Transparent
An object which allows some light through it such as tissue paper is called ……….
Translucent
Angle of incidence =
Angle of reflection
When light bends when it enters a denser material this is called ……….
Refraction
White light ………..
Is a mixture of colours
The order of the colours in the spectrum is …….
Red, Orange, Yellow, Green, Blue, Indigo, Violet
A red object appears red because it ……
Reflects red light but absorbs all the other colours
The three primary colours for light are …….
Red, Green and Blue
A green filter only lets …………….. light to pass through
Green
A red shirt will appear what colour in green light?
Black
Which travels faster, light or sound?
Light travels about a million times faster than sound
The part of the eye that detects light and sends an electrical signal to the brain is the ………
Retina
What is the closest value to the speed of sound in air? 30m/s, 300m/s, or 3,000m/s
300m/s
The range of human hearing is from about 20Hz to about what higher frequency? 200Hz, 2,000Hz, or 20,000Hz
20,000Hz
What are very high frequency sounds that humans cannot hear called?
Ultrasound
A device that turns sound energy into electrical energy is called a …………..
Microphone
An object which turns electrical energy into sound is called a …………..
Speaker
The part of the ear that first converts sound into vibrations is the …………
Ear drum
Which part of the ear turns vibrations into an electrical signal?
Cochlea
A high pitched sound as a ……………… Wavelength
Short
A low pitched sound has a ……………. frequency
Low
In an experiment results are usually repeated to increase ………
Reliability
