The movement of energy within an ecosystem (what eats what)
100
What is the periodic table used for?
It is a way to organise all of the elements into an easy to read format. The elements are grouped according to a range of properties.
100
What are the three particles found inside an atom?
The three sub-atomic particles are protons, neutrons and electrons.
100
What is an ecosystem?
A group of living things interacting with each other and their non-living surroundings.
100
What does the term 'radioisotope' mean?
Unstable atoms which emit particles or electromagnetic waves from their nucleus and undergo nuclear decay.
200
What do we call the plant a the start of the food which is able to produce energy from sunlight?
A producer.
200
Where would you find the non-metals on the periodic table?
On the right side.
200
What does the term anion mean?
An atom which has gained electrons and now has a positive charge.
200
What is the difference between a biotic and an abiotic factor?
Biotic factors are living while abiotic factors are not.
200
What are two possible negative effects of radiation?
Radiation burns, radiation sickness, cell mutation (which can cause cancer or impact upon future children).
300
What is a first order consumer?
A herbivore which eats a producer. It is in the second position in the food web.
300
Describe where Group 1 can be found on the periodic table.
The column on the left hand side.
300
If an atom had 8 electrons in total, how many electrons would it have in its outer shell?
6 as there would be two in the first shell and then the remaining 6 would be in the outer shell.
300
Explain the terms 'predator' and 'prey.'
Predators hunt other animals for food. The animal which is being hunted is called the prey.
300
Name two positive uses for radiation.
X-rays, cancer treatment, sterilisation of medical and food preparation equipment and finding minerals, oil, gas and water.
400
How is matter recycled in a food web?
Organisms called decomposers break down dead bodies and wastes ready for the producers to reuse. These are things like bacteria and fungi.
400
What does the atomic number tell us about an atom?
The number of protons it has. This will also match the number of electrons the atom has.
400
If an atom lost 3 electrons, what charge would it have?
3+
400
Explain the term 'parasitism.'
A relationship between two organisms where one organism benefits while the other organism is harmed.
400
What caused the 2011 nuclear disaster in Japan?
A combination of an earthquake and tsunamis which wiped out the cooling to the nuclear reactors.
500
What would happen if a species in a food web suddenly started dying from a disease?
It affects all other organisms in the food web. Some will have less food to eat and will start to eat more of other organisms while others will start to overpopulate because they are no longer being hunted.
500
Why are the elements in group 8 referred to as the 'noble gases?'
They are a group of elements who all have full outer electron shells and therefore wont react with other atoms.
500
Why is a solution containing ions able to conduct electricity?
The ions spread out and float around in the water. They are able to carry a charge through the solution.
500
Define the term 'adaptation' and give an example.
An adaptation is a special feature that an animal has to allow them to cope with their environment. These can be structural (a specific body part that helps them), behavioural or functional (a special way that their body works).
E.g. giraffes have long necks to help them reach the food high up in trees.
500
If a radioisotope has a half life of 4 days, what does this mean?
The time it takes for half of the isotopes to decay. If we started with 20, there would be 10 after four days and then after another four days there would only be five...