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7th Grade Science Unit 3.5 till 4.5
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How do living organisms use sensitivity?
To notice and respond to changes in their environment.
What is the role of vaccines in viral infections?
To help prevent illnesses by stimulating the immune system to recognize and fight viruses.
What is an example of energy transfer in power stations?
Chemical energy → Thermal energy → Kinetic energy → Electrical energy.
How do biologists identify organisms using keys?
By asking a series of yes/no questions based on characteristics.
What is dissipated energy?
Energy that spreads out and becomes less useful, like heat that cannot be reused.
What happens during respiration?
Food is broken down to release energy for the organism.
What is the difference between useful and wasted energy?
Useful energy is transferred in the desired form, while wasted energy dissipates as heat or sound.
What is elastic potential energy?
Energy stored when objects are stretched or compressed.
What is gravitational potential energy?
Energy stored when objects are raised against gravity.
What is chemical energy?
Energy stored in food, batteries, and fuels like coal and wood.
What are the seven characteristics of living organisms?
Feeding, respiration, growth, movement, sensitivity, excretion, and reproduction.
How do viruses replicate?
They invade living cells, use the cell's machinery to replicate, and burst out to infect more cells.
What is useful energy?
Energy transferred in the desired form, like light from a lamp.
What is thermal energy?
Heat energy transferred to colder objects.
What is kinetic energy?
Energy due to movement.
What is energy?
The capacity to do work or produce change.
What is a virus?
An extremely small structure made of a protein coat surrounding RNA.
What is variation?
Differences between individuals of the same species.
What is a specimen?
A sample.
What is the definition of species?
A group of organisms that can reproduce with others in the same species.
What is sensitivity?
The ability of an organism to notice and respond to changes.
What is RNA in a virus?
A substance containing coded instructions for making more viruses.
What is respiration?
Breaking down food to provide energy.
What does it mean to reproduce?
The ability of organisms to produce young.
What does replication mean?
Making copies of itself.
What is protein?
A chemical that is a necessary part of the cells of all living things.
What is an organism?
A living thing.
What is nutrition?
Feeding; taking in substances needed for growth or energy.
What is the definition of movement?
The ability of organisms to change position or shape.
What is special about a liger?
It is infertile and cannot reproduce.
How do biologists use keys?
To help them identify organisms.
What does "identical" mean?
Exactly the same.
What does "infertile" mean?
Unable to produce offspring.
What is the definition of growth?
A permanent increase in size.
What does "fertile" mean?
Being able to produce offspring.
What is the definition of excretion?
Getting rid of waste materials, such as carbon dioxide.
What is an electron microscope used for?
To see viruses because they are very small.
What does "dichotomous" mean?
Branching into two.
How do you construct a dichotomous key?
Think of a way to split organisms into groups, divide each group into two, and repeat until each organism can be identified.
What does "cannot" mean?
Means is not possible
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