Year 8 Science Mock Test Ecosystems
Which is the only group of organisms which can make their own food?
Plants
Fish
Meat
Trees
What is the name of the reaction which plants use to make their own food?
Aerobic Absorption
Photosynthesis
Combustion
Digestion
What are the two reactants involved in photosynthesis?
Oxygen and glucose
Carbon monoxide and carbon
Carbon dioxide and water
Carbon and hydrogen
Which chemical in plants cells absorbs light energy during photosynthesis?
Citric acid
Chloroplast
Fructose
Chlorophyll
What are the two products in photosynthesis?
Light energy and chlorophyll
Glucose and oxygen
Carbon dioxide and water
Light energy and heat
Would it be a problem if plants didn't get their correct amount of minerals?
Yes
No
What is the main problem due to mineral deficiency?
Lack of carbon dioxide
Lack of amino acids
Lack of growth
Lack of photosynthesis
What is the name for when some organisms make their own food through various chemical reactions?
Foodosynthesis
Obtaining food
Aerobic Synthesis
Chemosynthesis
Name one type of chemo-synthetic bacteria.
Sulfur bacteria
Harmful bacteria
Lead bacteria
Phosphorus bacteria
What is the role of the mitochondria in the plant cells?
Provides energy for respiration
Controls the cell's actions
Converts glucose into starch
Obtains minerals from the soil
What is respiration?
The process in which chlorophyll absorbs light
The process which plants use to make their own food
The process which organisms use to release energy from food
The process in which plants cells convert glucose to starch
What are the reactant(s) of aerobic respiration?
Nitrogen and hydrogen
Carbon dioxide and water
Glucose and energy
Glucose and oxygen
What are the product(s) of aerobic respiration?
Carbon dioxide, water and energy
Glucose and oxygen
Glucose
Energy and hydrogen
Why is this type of respiration called aerobic?
Because there is only one reactant
Because it releases energy in the form
Because it doesn't release energy in the form of oxygen
Because there is three products
What is the reactant(s) for anaerobic respiration?
Glucose
Glucose and oxygen
Nitrogen and hydrogen
Water
What is the product(s) for anaerobic respiration?
Carbon dioxide and water
Water
Glucose and energy
Lactic acid
Why is this type of respiration called anaerobic?
Because there is only one reactant
Because it doesn't release energy in the form of oxygen
Because it releases energy in the form of oxygen
Because there are three products
When does anaerobic respiration usually occur, and what is the problem with the product?
During sleep, and it can temporarily stop your brain from working
During science, and it can cause chicken to randomly appear
During exercise, and it can build up in your body and cause cramps
During asthma attacks, and it can stop the lungs from working
What is the name for the other type of anaerobic respiration which some organisms use?
Fermentation
Diaphragmation
Anaemia
Chemosynthesis
What is the reactant(s) for fermentation?
Oxygen
Hydrogen
Carbon dioxide
Glucose
What are the two products in fermentation?
Glucose and oxygen
Carbon dioxide and ethanol
Oxygen and lactic acid
Chlorophyll and light energy
What is the carbon dioxide in fermentation used for?
Used in yeast to make bread rise
Used for adding a taste in beer and wine
I have no idea
Used for converting sulfur dioxide into calcium carbonate in factories
What is the ethanol in fermentation used for?
Fermenting beer and wine
Used as a bio-fuel
Used for creating polymers
Making bread
What is the definition of the producer in food chains?
Animals that eat the consumer
The animal that eats the prey
Bacteria that decomposes dead animals
The plant in food chain- make their own food through photosynthesis
What is the definition of the consumer in food chains?
Animals that are eaten by the predator
Humans that consume food
Animals that eat the producer
The plant in the food chain
What is the definition of herbivore in food chains?
Eats other herbivores
Eats the consumers only
Gets eaten by the prey
Eats the producer only
What is the definition of carnivore in food chains?
Eats the producer only
Eats other consumers
Eats the prey
Gets eaten by the predator
What are the arrows used for in food chains?
To show what is eaten by what
To show where the top predator is
To show which direction the energy is passed on
To show the increase in energy
What is the trophic level?
The area where there is high temperature
The area where there is low temperature
The area where the animal has the least energy
A feeding step in a food chain
Where does all the energy for the food chain come from?
The Sun
The consumers
The predators
The top predator
What is a food web?
A diagram to show how producers are eaten by predators
A diagram to show how energy is passed on through food
Lots of food chains joined together
A diagram...
For example, if the population of cabbages decreases, how will it affect the population of rabbits?
The population of rabbits will stay the same
The population of rabbits will decrease
The population of rabbits will increase
Rabbits don't like cabbages
What is the definition of interdependence?
The build-up of toxins in organisms through a food chain
When a prey manages to escape from the predator
The way in which organisms depend on each other to survive, grow and reproduce
When a predator dies out
What is the definition of bio-accumulation?
The way in which organisms depend on each other to survive, to grow and to reproduce
When the amount of predators increases
When a prey manages to escape from the predator
The build-up of toxins in organisms through a food chain
What is the definition of an ecosystem?
The living and non-living parts of a specific area
The non-living part of an environment
The variety of food chains in an environment
The role of one species within an environment
What is the definition of a habitat?
The living and non-living parts of a specific area
The non-living part of an ecosystem
A group of ecosystems
The role of one species within an ecosystem
What is the definition of population?
All populations of all organisms in an ecosystem
The amount of organisms in an ecosystem
All members of one species in an ecosystem
I have no idea, sounds easy....
What is the definition of niche?
The role of one species in an ecosystem
The living and non-living parts of a specific area
All members of one species in an ecosystem
The non-living part of an ecosystem
Why are leaves perfect for photosynthesis?
Because they are lower down the plant to quickly get water and minerals
Because they are broad and flat to get lots of sunlight
Because they are in the perfect area to get lots of carbon dioxide
Because they just are...
What is the role of the stomata in the leaf?
It allows gases in and out the plant
It lets sunlight into the leaf
It connects to the stem, so it can receive water
I dunno...
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