scientist (n)
/ˈsaɪəntɪst/

someone who is trained in science, especially someone whose job is to do scientific research

theory (n)
 /ˈθɪə.ri/ 

a formal statement of the rules on which a subject of study is based or of ideas that are suggested to explain a fact or event

conclusion (n)
/kənˈkluʒn/

something that you decide when you have thought about all the information connected with the situation

sample (n)
/ˈsɑːm.pl̩/ 

a portion, piece, or segment that is representative of a whole

observation (n)
/ˌɑbzərˈveɪʃn/

the act of watching someone or something carefully for a period of time, especially to learn something

carry out (phrasal verb)
/ˈkeri aʊt/

to do or complete something

conduct (v)
 /kənˈdʌkt/

to organize and perform a particular activity

botany (n)
/ˈbɑt·ən·i/

the scientific study of plants and their structure

astronomy (n)
/əˈstrɒn.ə.mi/

the scientific study of the stars, planets, and other objects in the universe

zoology (n)
/zoʊˈɑlədʒi/

the scientific study of animals and their behavior

disprove (v)
/ˌdɪsˈpruv/

to show that something is wrong or false

combine (v)
 /kəmˈbaɪn/

to come together

react (v)
/riˈækt/

(chemistry) to experience a chemical change when coming into contact with another substance

planet (n)
/ˈplæn.ɪt/

a very large round object that moves around the Sun or another star

knowledge (n)
/ˈnɒl.ɪdʒ/

understanding of or information about a subject that you get by experience or study

nature (n)
/ˈneɪtʃər/

all the plants, animals, and things that exist in the universe that are not made by people

harm (v)
/hɑrm/

damage or injury that is caused by a person or an event

laser (n)
/ˈleɪzər/

a very strong line of light that can be used for cutting metal, in medical operations, etc.

robot (n)
/ˈrəʊ.bɒt/

a machine controlled by a computer that is used to perform jobs automatically

automation (n)
/ˌɔt̮əˈmeɪʃn/

the use of machines to do work that was previously done by people