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Christmas Test Flashcards

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Biology 101 flashcards
1
Q

What is an element

A

An element is a substance that contains one type of atom only

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2
Q

Define the term an atom

A

An atom is the building block of a material. It contains of three substance particles

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3
Q

What mass is in a proton

A

1

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4
Q

What mass is in neutron

A

1

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5
Q

What mass is in an electron

A

1/1040

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6
Q

Define the term molecules

A

They consist of two or more atoms chemically combined

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7
Q

Define the term molecules of an element

A

Two or more particles of the same element eg hydrogen gas

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8
Q

Define the term molecules of a compound

A

Two or more atoms of a different element’s chemical composition eg water H2O

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9
Q

Name 3 alkali metals

A

Lithium,sodium and potassium

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10
Q

What are alkali metals

A

Alkali metals all have 1 electron on the outer shell which they want to loose. This makes them very reactive

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11
Q

Where are alkali metals stored

A

Stored under oil to stop them from tarnishing (reacting with O2)

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12
Q

What happens when alkali metals are put in water

A

They are less dense than water so they float. They also fizz across the surface as they melt into a ball. Steam is released of due to heat released. Litumes paper turns blue as it is now an base and not an acid

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13
Q

What happens when alkali metals are put in water

A

They are less dense than water so they float. They also fizz across the surface as they melt into a ball. Steam is released of due to heat released. Litumes paper turns blue as it is now an base and not an acid

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14
Q

Define the term atomic number

A

the number of protons in the nucleus of an atom

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15
Q

Define the term mass number

A

the sum of the numbers of protons and neutrons present in the nucleus of an atom

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16
Q

What are protons

A

is a subatomic particle with a positive electric charge

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17
Q

What are neutrons

A

an uncharged atomic particle

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18
Q

Define the term electron

A

negatively charged subatomic particle that can be either bound to an atom or free

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19
Q

What is the second group called

A

Alkaline earth metals

20
Q

How are alkaline earth metals alike

A

They all have 2 outer electrons they don’t want

21
Q

Name the 7 group

A

The halogens

22
Q

How are the halogens alike

A

They all have 7 outer electrons and are very reactive as they want to gain one

23
Q

What is group 8 called

A

The noble gasses

24
Q

What do the Nobel gases all have on common

A

All have a full outer shell which makes them very un reactive

25
Q

What do all the Nobel gases have in common

A

They all have a full outer shell which makes them very un reactive

26
Q

Define the term chemical bounding

A

It’s when 2 or more elements join together chemically

27
Q

What is ionic chemical bounding

A

It occurs between metal and nonmetal atoms. Metal atoms lose an electron while nonmetal ones gain one. Eg MgO

28
Q

Define the term covalent chemical bounding

A

It occurs between nonmetal atoms which share electrons. eg. H2 and CO2

29
Q

What happens during day 1-5 of the menstrual cycle

A

Your period starts as the lining of the womb gets released and comes out of the uterus

30
Q

What happens during days 6-12 of the menstrual cycle

A

The lining of the womb builds up to prepare for pregnancy

31
Q

What happens during day 14 of the menstrual cycle

A

Ovulation occurs and the egg gets released into the fallopian tube

32
Q

What happens during days 16-28 of the menstrual cycle

A

The lining of the womb stays the same and waits for the next cycle to continue and the cycle stays over again

33
Q

What happens during the fertile period

A

It is the time that a woman can get pregnant

34
Q

What does the sperm duct do

A

It carries sperm cells to the penis

35
Q

What happens in the testies

A

It is where the sperm is produced

36
Q

What happens in the penis

A

It is the transfer and fusing together of sperm to the vagina

37
Q

What happens on the scrotem

A

It is there to keep the temperature of the testies lower

38
Q

How many copies of each gene does a person have in each cheak sell

A

2

39
Q

What is meant be variation

A

It is the differences in the characteristics of the organisms

40
Q

What is the name of the process which evolution occurs

A

Theory of natural selection

41
Q

What does the womb do

A

It holds the foetus during pregnancy

42
Q

What is the cervix

A

It is the neck of the womb

43
Q

What does the vagina do

A

It is where the penis releases seaman and it’s the birth canal

44
Q

What does the fallopian tube do

A

It carries the egg words the uterus

45
Q

What does the overy do

A

The overy produces the egg

Science (21 decks)

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