The main stage is the life of a star during which it radiates energy because of fusion of hydrogen nuclei in its core
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Mass
The quantity of matter in an object;
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Mass number
The number of protons plus neutrons in the nucleus of an atom
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Mass spectrometer
A machine that can be used to analyse small amounts of a substance to identify it and to find its relative molecular mass
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Mean
The arithmetical average of a series of numbers
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Median
the middle value in a list of data
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Meiosis
The two-stage process of cell division which reduces the chromosome number of the daughter cell. It is involved in making the gametes for sexual reproduction
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Mesophyll tissue
The tissue in a green plant where photosynthesis takes place
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Mineral ion
Chemical needed in small amounts as part of a balanced diet to keep the body healthy
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Mitochondria
The site of aerobic cellular respiration in a cell
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Mitosis
Asexual cell division where two identical cells are formed
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Mode
The number that occurs most often in a set of data
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Mole
The amount of substance in the relative atomic or formula mass of a substance in grams
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Molecular formula
The chemical formula that shows the actual numbers of atoms in a particular molecule c
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Molecular ion peak
The peak on the mass spectrum of a substance which tells us the relative molecular mass of the substance. The peak is produced by the heaviest positive ion shown on the mass spectrum
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Momentum
This equals mass (kg) x velocity (m/s). The unit of momentum is the kilogram metre per second (kg m/s)
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Multicellular organism
An organism that is made up of many different cells which work together. Some of the cells are specialised for different functions in the organism.
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Muscle tissue
The tissue that makes up the muscles. It can contract and relax.
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Other cards in this set
Card 2
Front
The main stage is the life of a star during which it radiates energy because of fusion of hydrogen nuclei in its core
Back
Main sequence star
Card 3
Front
The quantity of matter in an object;
Back
Card 4
Front
The number of protons plus neutrons in the nucleus of an atom
Back
Card 5
Front
A machine that can be used to analyse small amounts of a substance to identify it and to find its relative molecular mass
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