Science Vocabulary

On this page you will find science vocabulary.

These words will help you write about the topic or talk about it in the test. It will also help with your reading if you have a text related to this topic.

You will find:

The word The definition
An example sentence

Science Vocabulary




A drug which has no physical effects, used in pharmaceutical tests to compare the physical effects of taking a real drug from its psychological effects.



She was given a placebo, not the real drug, but she said she felt much better.




The placebo effect is when someone's condition improves because they think they are taking medicine.


She was given a placebo, not the real drug, but she said she felt much better- that's the placebo effect.


A side



An extra, usually bad, occurrence caused by taking a drug.

Drugs should not be tested on animals because there are many possible side effects.

Much of today's modern medicine has side effects. I prefer alternative therapies.






To show a particular result after a period of time.

The amount of evidence that scientists now have proves that climate change is being caused by humans.

We now have proof that climate change is caused by human activity.




A test done in order to learn something or to find out whether something works or is true

Experimenting on animals is necessary in order to discover if new drugs are dangerous or not.

Scientists are conducting experiments to test the effectiveness of the new drug.





A part of the DNA in a cell which contains information in a special pattern received by each animal or plant from its parents, and which controls its physical development, behaviour, etc

Genes are an important factor in personaility development.

The doctors think his illness was genetic. It came from his mother because she had the same illness when she was young.


Engineering /


Changing the structure of the genes of a living thing in order to make it healthier or stronger or more useful to humans.


There is evidence that genetically modified food is harmful to humans.

Some plants have been genetically engineered to be resistant to herbicides.





Plants, animals or micro organisms that have changed through genetic engineering.

Most commercialised GMO crop plants are insect resistant and/or herbicide tolerant.


A plant or animal which has the same genes as the original from which it was produced

The first animal to be cloned was Dolly the sheep.

I believe that cloning humans is unethical.


The deliberate large-scale intervention in the Earth’s climate system, in order to try and control global warming

Some scientists believe geoengineering is the only way to reduce the warming of the climate.

Controlling the weather by geoengineering is a possible solution to climate change, but it is controversial.


A prefix for things related to computers, especially the internet.


Cyberbulling via social media such as Facebook has become a major problem.

A cybercafe is a place where you can buy drinks and use computers at the same time.

High-Tech /


Using the most advanced and developed machines and methods.

Japan is a very high-tech country. Everyone has all the latest electronic gadgets.


A formal statement of the rules on which a subject of study is based or of ideas which are suggested to explain a fact or event or, more generally, an opinion or explanation

There are two opposing theories on the causes of climate change - one says it is caused by humans, the other believe it is a natural cycle.


Check out more science vocabulary in these science related essays:

cloning, scientific research, alternative medicine.

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Diet, Fitness and Health


Information Technology



The Arts

Children and The Family




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