30 Questions
What is the purpose of a device in a circuit?
It prevents large flow of current through a circuit
What is the SI unit for electric current?
ampere
What is true about angiosperms?
They are vascular plants bearing flowers
What is true about diffusion?
It is the process of particles moving from higher to lower concentration
What is true about natural gas?
It is a non-renewable energy resource
What happens when you add a light bulb to a series circuit?
Total resistance increases
What is the source of energy used to produce electricity in hydroelectric power stations?
Water
What happens to the resistance in a parallel circuit when more resistors are added?
It decreases
How does the current flowing through each branch in a parallel circuit compare to the current flowing out from the source?
It is less than
How are animals classified?
As vertebrates and invertebrates
What is the characteristic of the class of invertebrates that includes arthropods?
Segmented body
What is an example of an arthropod?
Crab
What is the primary reason why solids cannot diffuse?
Because of the rigid arrangement of particles
Why do gases generally have lower densities than liquids?
Because gas particles are farther apart
What happens when a liquid is cooled?
It becomes a solid
What is the element represented by the symbol 16S?
Sulfur
What is the atomic number of the element Sulfur?
16
How many protons and electrons are present in a neutral atom of Sulfur?
16 protons, 16 electrons
What is the function of component X in the electric circuit?
To provide a path for the flow of electrons
Which direction do electrons flow in a circuit?
From negative to positive terminal
Why may component X be useful in the electrical circuit?
To provide a path for the flow of electrons
What can be concluded from the ammeter readings in a series circuit?
The current is the same at each point
What is the function of component Y in the electric circuit?
To convert electrical energy to light energy
What is wrong with the ammeter in the electric circuit?
It is connected in parallel to the circuit
What is an advantage of using wind to generate electricity?
It produces no noise
What is a disadvantage of using a wind generator to charge a battery?
It is expensive to maintain
What is a disadvantage of using solar energy to generate electricity?
It is expensive to install
What are two disadvantages of burning fossil fuels?
They produce pollution and contribute to climate change
What is the main difference between renewable and non-renewable energy resources?
Renewable resources are sustainable, non-renewable resources are not
What is ethanol, and where does it come from?
Ethanol is a renewable energy source and comes from plants
This quiz covers questions from 7th class science curriculum, including topics on hydroelectric power, electricity circuits, and zoology classification.
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