Flashcards in End of year exams Deck (121):
What is the formula for water
What is the chemical formula for carbon dioxide
What is the chemical formula for Hydrochloric acid
What is the chemical formula for methane
What is the chemical formula for Sulphuric acid
What is the chemical formula for Iron sulphide
What elements are present in water
Hydrogen and oxygen
What elements are present in carbon dioxide
Carbon and oxygen
What elements are present in hydrochloric acid
Hydrogen and chlorine
What elements are present in methane
Carbon and hydrogen
What elements are present in sulphuric acid
Hydrogen, sulphur and oxygen
What elements are present in iron sulphide
Iron and sulphur
What is a molecule?
A molecule is made up of atoms of the same element joined together
What is a chemical formula?
A chemical formula shows which elements are present in a substance. It also tells you the number of atoms present in each element.
What is an element?
An element is a substance that is only made up of 1 type of atom
What is an atom?
An atom is the smallest part of an element that can exist
What is the trachea
It has rings of cartilage to keep it open
What does the ribcage do?
The bones protect the lung behind it
What does the heart do?
It is a muscle so it it is able to pump blood around the body
What does the lung do?
It circulates blood into the blood stream
What does the bronchus do?
The air travels to go into the blood
What does the bronchiole do?
It is a small tube for air to travel in
What does the alveolus do?
It diffuses oxygen into the blood
What is the correct word for theskull
The bone in between the ribcage
The highest bone in the arm
The small bones protecting the spine
The 2 lowest bones in the arm
Ulna and radius
The highest bone in your leg
The knee cap
What bone is where the shin is
The bone underneath the shin
What does cartilage do?
It reduces fraction and acts as a shock absorber
What does synovial fluid do?
It lubricates the joint
What is a joint?
It is a place where 2 or more bones meet
What is a ligament
It joins bone to bone stabilising the joint
2 types of joints are
Moveable or fixed
What does a cell membrane do?
It controls what comes in and out of a cell it's like a barrier
What does a nucleus do?
It controls everything in the cell
What does the cytoplasm?
It is a soft substance where the chemical reactions take place.
What is the mitochondria?
It is where respiration happens which is one of the most important things
What is respiration?
It is where energy is transfered
What does the cell wall do?
It provides support it's made of a tough fibre named cellulose, which makes it rigid
What does the vacuole do?
This contains cell-sap,which keeps the cell firm
What does the chloroplast do?
This is where photosynthesis takes place which traps energy transferred from the sun
What is a unicellular organism?
It's a loving thing that is only made up of 1 cell.
Give 2 examples of unicellular organisms
Euglena, amoeba or bacteria.
What is diffusion?
When particles from an area of high concentration move to an are of low concentration
What is friction?
It is a force between 2 surfaces that are in contact
What are balanced forces?
When 2 forces acting on an object are equal in size but act in different directions we say that they are balanced
What are unbalanced forces?
When 2 forces acting on an object are not equal in size, we say that they are unbalanced forces
What is a wave?
It is an oscillation or or vibration that transfers energy
What is refraction?
It's when light gets passed from 1 medium into a more dense substance which makes the direction change and make it look very different
What is dispersion?
It is the splitting of light
What type of wave is a sound wave?
What must sound waves pass through to be heard?
A medium (solid, liquid or gas)
The higher the amplitude the higher the...
The greater the frequency the higher the...
The pitch of a sound depends on the...
Frequency is measured in..
What is the audible human ear range?
What is anything above 20,000Hz called for humans?
What are echoes?
They are reflections of sound waves
What can they be reflected off.
What surfaces are good at reflecting sounds
Hard or smooth
What surfaces are good at absorbing sounds?
Soft or rough
What is the method for using echoes to calculate distances?
Total travelled distance by sound= speed of sound(in m/s) x Time taken to hear echo
Distance to object = Total distance travelled by sound divide by 2
The amount of focus the microscope uses
What is a specialised cell?
It is a cell that is made to do a certain job
What is a resolution?
To attempt to fix something whether it be in the organism or anywhere else
What is a microscope?
It is a piece of equipment you use to get a closer look on anything especially cells you can look further if you turn up the focus wheel
What is an organism?
There are many working cells inside a organism and there are many in our body
What are red blood cell adaptions.
The red blood cells transfer oxygen to get rid of carbon dioxide, it gets transported to the lungs for us to exhale
What are nerve cell adaptions?
It sends out many mini signals to other parts of the organism to help them function
What are root hair cell adaptions?
They speed up osmosis because they have a large surface area.
What are egg cell adaptions?
It is supposed to be fertilised by a sperm cell and it has a special egg membrane to make sure it is only fertilised by 1 sperm
What is binary fission?
This is where 1 cell splits into 2 cells to reproduce bacteria
What medium is oxygen?
What medium is perfume?
What medium is orange juice?
What medium is wood?
What medium is helium?
What medium is ice?