Biology
This type of organism makes its own food using sunlight.
What is a producer?
This is the substance that gets dissolved when cordial powder is mixed with water
What is the solute?
This is the regular rise and fall of the ocean’s water level.
What is a tide?
A ramp is this type of simple machine.
What is an inclined plane?
This variable is deliberately changed during an investigation.
What is the independent variable?
In the food chain algae → mosquito larva → fish → pelican,
this organism is the primary consumer.
What is the mosquito larva?
This is the substance that dissolves a solute to form a solution.
What is the solvent?
This object’s gravity has the greatest effect on Earth’s tides.
What is the Moon?
This part of a lever is the fixed point around which the lever turns.
What is the fulcrum?
This variable is measured or observed during an investigation.
What is the dependent variable?
Fungi and bacteria perform this important role by breaking down dead organisms.
What is decomposition?
Crushing a sugar cube into smaller pieces makes it dissolve faster because it increases this.
What is its surface area?
These tides occur when the Sun, Earth and Moon form a right-angle arrangement.
What are neap tides?
Scissors belong to this class of lever because the fulcrum is between the effort and the load.
What is a first-class lever?
These variables are kept the same to make an investigation fair
What are controlled variables?
In a food-chain arrow, this is transferred from one organism to another.
What is energy?
A student wants salt to dissolve more quickly. Name two actions the student could take.
What are stirring the mixture and heating the water?
These Moon phases produce spring tides because the Sun, Earth and Moon are aligned.
What are the new Moon and full Moon?
Moving the fulcrum closer to the load causes this change in the effort needed to lift the load.
What is a decrease in effort?
A graph must include labels on both axes and one of these at the top.
What is a title?
In a food web, insects are eaten by frogs and small birds. If the insect population decreases greatly, this will probably happen to the frog and small-bird populations.
What is a decrease in both populations?
A drink still has undissolved powder at the bottom after a long period of stirring. This suggests the solution has reached this point.
What is the saturation point?
A beach reaches high tide at 8:00 am. This is the approximate time the next low tide will occur.
What is 2:00 pm?
A machine lifts an 80 N load using an effort force of 20 N. This is its mechanical advantage.
What is 4?
This type of graph uses points connected by lines to show how results change.
What is a line graph?