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Louisa FlashCards > SCIENCE YR8 TERM 2 > Flashcards

SCIENCE YR8 TERM 2 Flashcards

1
Q

What does fungi mean

A

A Kingdom of usually multicellular organisms

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2
Q

What does budding mean

A

A type of asexual reproduction in which a daughter cell grows out of a parent cell

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3
Q

What does fungi respiration mean

A

Aerobic respiration which is with oxygen and then anaerobic respiration which is with out oxygen

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4
Q

What does population mean

A

A number of a certain species

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5
Q

What does a limiting factor mean

A

Something that slows or stops the process growth curve

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6
Q

What are some examples of fungi

A

Mushrooms which are multi cellular
yeast which is unicellular
parastic fungi

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7
Q

What is the word equation for aerobic respiration

A

glucose + oxygen - carbon dioxide + water

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8
Q

What is the word equation for anaerobic respiration

A

glucose + carbon dioxide - ethanol

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9
Q

What what is bacteria

A

It is a unicellular microorganism that forms the Kingdom of prokaryotes

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10
Q

What do bacteria cells have and have not got

A

cell wall
cell membrane
cytoplasm
NO nucleus
NO mitochondria
NO chloroplast

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11
Q

If bacteria cells don’t have a nucleus then where the DNA strings stored

A

The DNA strings float in the cytoplasm

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12
Q

What is bacteria reproduction

A

It is an asexual reproduction the adult bacteria so divides into identical daughter cells using binary fusion (mitosis)

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13
Q

What are the living conditions that bacteria cells need

A

They need nutrients which is different for different species
they need temperature range
they need oxygen which is anaerobic and aerobic respiration

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14
Q

What is the other word for anaerobic respiration`

A

Fermentation

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15
Q

What does fermentation produce

A

Alcohols and acids

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16
Q

What do bacteria produce

A

Enzymes which are substances that breakdown food and speed up chemical reactions
toxins which are substances that trigger a response from the immune system and have a negative impact on other cells

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17
Q

What are protoctists

A

they are a kingdom of microorganisms They are a Kingdom of microorganisms

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18
Q

What do protoctists have

A

They are uni or multi cellular
and some have a cell wall
have a nucleus
have a mitochondria
some have chlodoplasts

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19
Q

What are some examples of protoctists

A

Amoeba’s - have pseudopods- fake feet they also have vacuoles which store food or water
Parameasian - have cillia that help them move, have vacuoles, have a primitive mouth opening
Algae - have a flagella, have chloroplasts, have a spot to detect light

20
Q

what is the word equation for photosynthesis

A

carbon dioxide + Water - glucose + oxygen

21
Q

what is a chromosome

A

a chain of genetic material (DND)

22
Q

What is the formula for making a pie chart

A

100

23
Q

what does the word ecosystem mean

A

a part of the environment made up of ….y of linked organisms in a food chain

24
Q

what does the word decomposers mean

A

microorganisms that feed on waste an breakdown cells using enzymes

25
Q

what does the word decay mean

A

a process of rotting, decomposing that release heat and gases

26
Q

what does the word nutrients mean

A

organic substances used as food by living organisms

examples of this would be proteins ,carbohydrates and fats

27
Q

what does the word carbon cycle mean

A
  • nutrients are converted to glucose
  • glucose is used in cellular respiration
  • a scientific model showing a simple way the processes through which carbon precipitants in the life cycle, food chains and transformations in an ecosystem
28
Q

what happens at stage one of decay

A

large organic molecules are too big to be absorbed by the cell and enzymes are released from the cell

29
Q

What happens at stage two of decay`

A

Enzymes help to break apart the large molecules

30
Q

What happens at stage three of decay

A

Small soluble molecules can be absorbed by the cell

31
Q

What shape is the earth

A

sphere

32
Q

What does the word orbit mean

A

Set ellipsoidal (oval ) path

33
Q

What is a moon

A

A satellite or a small object which is orbiting a planet

34
Q

What order are the different planets in in our solar system

A

Mercury
Venus
earth
Mars
Jupiter
Saturn
Uranus
Neptune

35
Q

Why is there approximately 24 hours between sunrise is for most places on the earth

A

It is because of the rotation of the planets

36
Q

What is a sundial

A

It is a scale marked to show the movement of the sun using shadows it can tell the time as the shadow moves around it

37
Q

what are the different phases of the moon

A

New
waxing crescent
first quarter
waxing gibbous
full
waning gibbous
last quarter
warning crescent
new

38
Q

why do we have different seasons throughout the year

A
  • they happened but cause the earth axis is tilted
  • when the earth access points towards the sun is summer in the northern hemisphere
  • when the earth access points away from the sun it is summer in the southern hemisphere
39
Q

what does the word magnet mean

A
  • metallic object that has the property to affect other metals through a magnetic field
  • magnets have two opposite poles one a…. of the earth and the other one south
40
Q

what does SSP mean

A

south seeking pole

41
Q

what does NSP mean

A

North seeking pole

42
Q

what is a compus

A

an instrument that uses a magnet to point towards the earth’s north pole

43
Q

what is a solar eclipse

A

when the moon moves in frount of the sun

44
Q

what is a lunar eclipse

A

when the earth moves between the moon and the sun

45
Q

what does umbra mean

A

a full shadow

46
Q

what does penumbra mean

A

a pARTIAL SHADOW

47
Q

what is the formula for calculating weight

A

mass (kg) x gravitational field strength (N/kg)

Louisa FlashCards (15 decks)

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