Term2/Half Yearly

Question 1

How can you consider something to be alive?

Answer 1

if it has at least one cell, grows, maintains itself, and reproduces

Question 2

How can you consider something to not be alive?

Answer 2

if they are not made up of cells

Question 3

who first looked at cells under the microscope?

Answer 3

Robert Hooke

Question 4

who made up this theory: All living things are made up of one or more cells.

Answer 4

Schleiden and Schwann

Question 5

what are the levels of organisation?

Answer 5

Cell, tissues, organs, organ systems, multicellular organisms

Question 6

The chemical equation for respiration is:

Answer 6

glucose + oxygen
→
carbon dioxide + water +
energy

Question 7

what type of molecule is energy stored in?

Answer 7

ATP

Question 8

why would our breathing increase/decrease during cellular respiration

Answer 8

because we are exercising/resting

Question 9

what is photosynthesis as an equation?

Answer 9

carbon dioxide + water
chlorophyll (over) light→
glucose + oxygen gas

Question 10

what does chlorophyll do in photosynthesis?

Answer 10

takes in the sunlight and converts it into energy

Question 11

what is diffusion

Answer 11

when gases move from areas of high concentration to low concentration.

Question 12

How is water taken up by the plant?

Answer 12

the roots absorb the water

Question 13

How do gases pass through the leaf?

Answer 13

The underside of the leaf has openings called stomata which allow gases to pass through them. Which is diffusion

Question 14

how does Carbon dioxide enter into plants?

Answer 14

Through the stoma and diffusion

Question 15

in a leaf what is the concentration like of co2

Answer 15

the concentration is low.

Question 16

what does photosynthesis produce?

Answer 16

oxygen and glucose.

Question 17

where does light enter into the leaf?

Answer 17

Through the cuticle, the clear top layer of the leaf.

Question 18

does temperature affect diffusion+ why

Answer 18

yes, because the energy from the heat/cool speeds up/slows down the particles

Question 19

what is sedimentation and decanting purpose?

Answer 19

Both are used to separate solid particles from a liquid,

Question 20

what is the physical principle used in filtration

Answer 20

size-exclusion

Question 21

what is the physical principle used in sedimentation and decanting

Answer 21

gravity

Question 22

what is the physical principle used in centrifuging

Answer 22

centrifugal force

Question 23

what is the physical principle used in
evaporation

Answer 23

liquids vaporise easily while solids do not

Question 24

what is the physical principle used in crystallization

Answer 24

solubility

Question 25

what is the physical principle used in distillation

Answer 25

different liquids boil at different temperatures

Question 26

what is the physical principle used in chromatography

Answer 26

molecules in a mixture applied onto the surface or into the solid, and the fluid stationary phase (stable phase) separates from each other while moving with the aid of a mobile phase.

Question 27

what is the cell theory?

Answer 27

1. All organisms are composed of one cell or more cells 2. Cells are the basis of every living structure 3. New cells are created from existing cells

Question 28

who came up with the cell theory?

Answer 28

Hooke and Schleiden and Schwann.

Question 29

can you calculate the magnification of a microscope

Answer 29

eyepiece X objective lens.

Question 30

compare animal cells to plant cells

Answer 30

Plant cells have a cell wall in addition to a cell membrane, whereas animal cells have only a cell membrane.

Question 31

what is the nucleus's function

Answer 31

Brain controls and regulates the activities of the cell, carries the genes and structures that contain the hereditary information

Question 32

what is the cytoplasm's function

Answer 32

Liquid Glue the fluid that fills cells and holds the internal components of cells in place and protects them from damage

Question 33

what is the cell membrane's function

Answer 33

protects a cell and provides a fixed environment inside the cell.

Question 34

what is the cell wall's function

Answer 34

Wall (Only Plant Cell) provides strength and protection against stress.

Question 35

what is the chloroplast's function

Answer 35

plant cell organelles that convert light energy into energy via the photosynthetic process

Question 36

what is the mitochondria's function

Answer 36

membrane-bound cell organelles that generate most of the chemical energy needed to power the cell's biochemical reactions.

Question 37

what are the ribosomes' function

Answer 37

the sites at which information carried in the genetic code is converted into protein molecules

Question 38

what are the vacuoles' function

Answer 38

to take in waste products and get rid of it

Question 39

what is the muscle cell's functional

Answer 39

responsible for practically all movements that are under voluntary control

Question 40

what is the nerve cell's function?

Answer 40

A type of cell that receives and sends messages from the body to the brain and back to the body.

Question 41

what is the sperm cell's function?

Answer 41

to fertilise an egg.

Question 42

what is the egg cell's function?

Answer 42

to connect with the male sperm cell to become fertilised and produce offspring.

Question 43

what is the red blood cell's function?

Answer 43

to carry oxygen from the lungs and deliver it throughout our body.

Question 44

what is the root hair cell's function?

Answer 44

to absorb water from the soil

Question 45

what is the palisade cell's function?

Answer 45

photosynthesis

Question 46

what is the white blood cell's function?

Answer 46

to help the body fight infection and other diseases.

Question 47

define density

Answer 47

the amount of matter per unit volume

Question 48

what is the importance of water as a solvent in everyday industries

Answer 48

allows chemical reactions to take place because it allows dissolved chemicals to move around

Question 49

what happens to solute particles when they dissolve in a solvent

Answer 49

the solute breaks up from a larger group of molecules into much smaller groups or individual molecules

Question 50

what is reliability

Answer 50

when an experiment is done minimum 3x, you remove the outliers and look for consistency

Question 51

what is fairness

Answer 51

only one independent variable and controlled variables

Question 52

what is accuracy

Answer 52

when you have the right tech and equiptment