Science 3.0 ovo

Question 1

what is cromotography

Answer 1

the teqhnique that uses a difference in solubility to seperate a mixture

Question 2

what is in an animal cell

Answer 2

cell memebrane, cytoplasm,nucleus,mitrochondria

Question 3

what is in a plant cell

Answer 3

cell,chloroplast,vacuole and the rest is the same as the animal cell

Question 4

State the function of the nucleus and cell membrane

Answer 4

Nucleus-stores DNA
Cell membrane-lets substances in and out

Question 5

function of cytoplasm and cell wall

Answer 5

cytoplasm-sight of chemical reactions
cell wall-helps support and protection

Question 6

function of vacuole and chloroplast

Answer 6

vacule-food digestion
chloroplast-photosynthesis

Question 7

Function of mitochondria

Answer 7

respiration / energy release

Question 8

Define osmosis.

Answer 8

The movement of water from an area of high concentration to an area of low concentration.

Question 9

types of energy stores

Answer 9

chemical,kenitic,gravational,vibrational,elastic potential,thermal or internal,magenetic,electrostatic,nucleur

Question 10

List energy pathways.

Answer 10

Mechanical,electrical,heat,radiation

Question 11

what is internal energy

Answer 11

the sum of the kenetic and potiential energy stores of all the particles in a system

Question 12

meaning of temperature

Answer 12

the average kenitic energy of each particle in the material

Question 13

what is conservation of energy

Answer 13

energy can neither be destrpyed or created it is just moved

Question 14

how much calories does an adult need

Answer 14

8400 kj

Question 15

how much is one calorie = joules

Answer 15

1 calorie= 4.2 joules

Question 16

meaning of kenitic

Answer 16

like thermal energy

Question 17

meaning of electrical potential

Answer 17

always attracted to each other

Question 18

Define thermal equilibrium

Answer 18

When the temperature on both sides is equal.

Question 19

Define convection

Answer 19

As air gets hotter the particles move quicker and move further apart as the air expands and becomes less dense and rises to be replaced with colder air which is more denser and falls down again.

Question 20

Define insulation.

Answer 20

Air is very poor conductor of thermal energy and is good for insulation / keep things warmer.

Question 21

meaning of radiation

Answer 21

heat radiation or infrared radiation is when electro magnetic wave it travels at the speed of light and can travel through a vaccum

Question 22

where does the thermal energy from the sun comes to us by?

Answer 22

fruned radiation

Question 23

which is better at absorbing energy
dark objects
light objects

Answer 23

darker objects

Question 24

do all bodies emit and absorb heat?

Answer 24

yes

Question 25

what are some uses of infared radiation

Answer 25

grilling,tv remote,night vision cameras

Question 26

when do liquids evaporate

Answer 26

when heated because the particles gain energy and move further apart

Question 27

meaning of percipitation

Answer 27

as the water droplets grow in size they get more dense and so fall down

Question 28

what are organs made off

Answer 28

cells

Question 29

what is a cell membrane use

Answer 29

gat e keeper like

Question 30

what is dna short for

Answer 30

dioxyiroc nucleur acid

Question 31

what is formed when dna winds up tight

Answer 31

chromosomes

Question 32

what is the 2 possible formations of dna

Answer 32

t-a (or other way round) g-c (or other way round)

Question 33

what was it discovered by

Answer 33

rosalyn franklin

Question 34

who contributed in discovering dna

Answer 34

franklin,wilkins,watson,crick

Question 35

what are the base pairs joined by

Answer 35

hydrogen bonds

Question 36

look on the answer and revise it cuz i couldnt think of a question

Answer 36

cell , nucleus , chromosome , geneom , genes ,dna , double helix

Question 37

look on the answer and revise it cuz i couldnt think of a question

Answer 37

cell , nucleus , chromosome , geneom , genes ,dna , double helix

Question 38

meaning of allele

Answer 38

different version of a gene

Question 39

how many pairs do we have in a cell

Answer 39

23

Question 40

how many chromosomes we have in a cell

Answer 40

46

Question 41

how long was the human geneome project

Answer 41

13 years long

Question 42

how many genes were identified in the human body

Answer 42

25,000

Question 43

what do many cells equal

Answer 43

tissue

Question 44

what do many tissues equal

Answer 44

organ

Question 45

what do many organs equal

Answer 45

organ system

Question 46

what does the small intestine have

Answer 46

villi to absorb moistures

Question 47

what makes villi good to absorb water

Answer 47

a good supply of cappiliries and increase srface area

Question 48

what are the three types of enzymes

Answer 48

amylase, protease , lipase

Question 48

what are the three types of enzymes

Answer 48

amylase, protease , lipase