SCIENCE YR8 TERM 2

Question 1

What does fungi mean

Answer 1

A Kingdom of usually multicellular organisms

Question 2

What does budding mean

Answer 2

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

Question 3

What does fungi respiration mean

Answer 3

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

Question 4

What does population mean

Answer 4

A number of a certain species

Question 5

What does a limiting factor mean

Answer 5

Something that slows or stops the process growth curve

Question 6

What are some examples of fungi

Answer 6

Mushrooms which are multi cellular
yeast which is unicellular
parastic fungi

Question 7

What is the word equation for aerobic respiration

Answer 7

glucose + oxygen - carbon dioxide + water

Question 8

What is the word equation for anaerobic respiration

Answer 8

glucose + carbon dioxide - ethanol

Question 9

What what is bacteria

Answer 9

It is a unicellular microorganism that forms the Kingdom of prokaryotes

Question 10

What do bacteria cells have and have not got

Answer 10

cell wall
cell membrane
cytoplasm
NO nucleus
NO mitochondria
NO chloroplast

Question 11

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

Answer 11

The DNA strings float in the cytoplasm

Question 12

What is bacteria reproduction

Answer 12

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

Question 13

What are the living conditions that bacteria cells need

Answer 13

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

Question 14

What is the other word for anaerobic respiration`

Answer 14

Fermentation

Question 15

What does fermentation produce

Answer 15

Alcohols and acids

Question 16

What do bacteria produce

Answer 16

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

Question 17

What are protoctists

Answer 17

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

Question 18

What do protoctists have

Answer 18

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

Question 19

What are some examples of protoctists

Answer 19

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

Question 20

what is the word equation for photosynthesis

Answer 20

carbon dioxide + Water - glucose + oxygen

Question 21

what is a chromosome

Answer 21

a chain of genetic material (DND)

Question 22

What is the formula for making a pie chart

Answer 22

100

Question 23

what does the word ecosystem mean

Answer 23

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

Question 24

what does the word decomposers mean

Answer 24

microorganisms that feed on waste an breakdown cells using enzymes

Question 25

what does the word decay mean

Answer 25

a process of rotting, decomposing that release heat and gases

Question 26

what does the word nutrients mean

Answer 26

organic substances used as food by living organisms examples of this would be proteins ,carbohydrates and fats

Question 27

what does the word carbon cycle mean

Answer 27

- 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

Question 28

what happens at stage one of decay

Answer 28

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

Question 29

What happens at stage two of decay`

Answer 29

Enzymes help to break apart the large molecules

Question 30

What happens at stage three of decay

Answer 30

Small soluble molecules can be absorbed by the cell

Question 31

What shape is the earth

Answer 31

sphere

Question 32

What does the word orbit mean

Answer 32

Set ellipsoidal (oval ) path

Question 33

What is a moon

Answer 33

A satellite or a small object which is orbiting a planet

Question 34

What order are the different planets in in our solar system

Answer 34

Mercury Venus earth Mars Jupiter Saturn Uranus Neptune

Question 35

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

Answer 35

It is because of the rotation of the planets

Question 36

What is a sundial

Answer 36

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

Question 37

what are the different phases of the moon

Answer 37

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

Question 38

why do we have different seasons throughout the year

Answer 38

- 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

Question 39

what does the word magnet mean

Answer 39

- 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

Question 40

what does SSP mean

Answer 40

south seeking pole

Question 41

what does NSP mean

Answer 41

North seeking pole

Question 42

what is a compus

Answer 42

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

Question 43

what is a solar eclipse

Answer 43

when the moon moves in frount of the sun

Question 44

what is a lunar eclipse

Answer 44

when the earth moves between the moon and the sun

Question 45

what does umbra mean

Answer 45

a full shadow

Question 46

what does penumbra mean

Answer 46

a pARTIAL SHADOW

Question 47

what is the formula for calculating weight

Answer 47

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