Grade 6 - Natural Science June exam

what is an ecosystem

what is a habitat

no life without plants - why do ecosystems need plants

life from soil

scavengers

termites and the soil

a place where certain types of plants grow

takes thousands of years to form

essential for life

a habitat and its plants and animals

feed on leftovers

keeps soil healthy

mixture of plant and animal matter

fungi

they recycle fallen trees back into the soil

natures recyclers

digestion in animals
describe the process

digestion in animals
describe the process

explain the following term
"there would be no life without plants" (5)

what is rotten plants and animals?

termites grow a ………. to help digest their food
have what to help them break down plant material

everything in a natural ecosystem is

mushrooms and moulds are

the termites make their own ……. to build the mound by mixing soil with their saliva

explain the term "habitat" (2)

name three different animals that make use of a termite mound and what they use it for

name the various types of life forms in the soil and explain their function in terms of life in the soil (5)

what is digestion

saliva

teeth - coated in enamel
hardest part of your body
chew your food to break it up into smaller pieces

how would you tell the difference between spotted and brown hyenas if you could not see them? explain (5)

why is chewing gum not a good practice for the body?(4)

why can snakes eat animals much bigger than themselves?

Name 5 types of joints

Characteristics of fibrous joints

Characteristics of Ball and socket joints

Characteristics of Hinge joints

Characteristics of Gliding joints

Characteristics of Pivot joints

ball and socket joints are found where

name an immovable joint

ribs are part of your body known as

name 3 important functions of the skeleton

why are joints necessary

name the 5 senses

in order for us to have a sense we need

describe how the eyes work

skin sensors

smell sensors

explain how we hear sounds

outside flap which collects the sound

directs the sound onto the eardrum which vibrates

a thin rounded membrane which vibrates and transmits the sound to the middle ear

receives vibrations from the eardrum and transmits them to the inner ear

these are fluid filled and vital to our sense of balance

contains nerve cells which transmit the sound to the auditory nerve

carries sound to the part of the brain which controls sound

connects the middle ear to the back of the nose. it is used to equalize pressure

all sounds are caused by

what are sensitive and help us to see at night

what part of the ear provides information about the movement of the head

parts of the ear - Cochlea

parts of ear - Ear drum

parts of ear - Hammer

parts of ear - Nerves

parts of the ear - Outer ear canal

parts of the ear - Semicircular canals

parts of ear - Stirrup

Balance

we get dizzy because

human skeleton divided into

axial skeleton =

appendicular skeleton =

parts of the bone

end of each bone covered by tough smooth shiny substance called

bones held together by strong stretchy bands called

bones are made up of cells that are constantly being replaced - these are called

identify solids, liquids and gases

identify solids, liquids and gases

identify solids, liquids and gases

matter - give 4 properties

particles =

matter =

solids
liquids
gases

give 2 facts about the arrangement of particles for solids, liquids and gases

how do particles move for solids, liquids and gases

draw the particles arrangements
a=gas
b=solid
c=liquid

mixture =

separate =

filtering

mixing solid and liquid substances-
a mixture consists of at least two different substances mixed together
what do we observe when we mix substances?

mixing solid and liquid substances-
a mixture consists of at least two different substances mixed together
what do we observe when we mix substances?

mixing solid and liquid substances-
a mixture consists of at least two different substances mixed together
what do we observe when we mix substances?

mixtures and ways of separating

ways of separating different mixtures

revise:
a)mixture
b)separate
c)sieving
d)filtering
e)settling

Draw and label the substances to show what happens when you mix the following:
water and sand

Draw and label the substances to show what happens when you mix the following:
water and oil

Draw and label the substances to show what happens when you mix the following:
beans and peanuts

solution

dissolve

uniform

soluble

solvent

solute

soluble = can dissolve
insoluble = cannot dissolve

melting vs dissolving

substances in solutions cannot be separated by sieving, filtering,settling etc as they can pass through the very smallest holes
some solutes can be recovered/separated by

crystallization =

filter paper

crystallisation =

volume (is measured in ml or L)

mass (is measured in kg or g)

mass meter

measuring cylinder

saturated solution - a solution with solute that is unable to dissolve anymore- leaving undissolved substances at the bottom

saturated

rate

factors that affect the time it takes for a solute (e.g. sugar) to dissolve in a solvent (tea) - factors that affect the rate of dissolving

factors that affect the time it takes for a solute (e.g. sugar) to dissolve in a solvent (tea) - factors that affect the rate of dissolving

water pollution

causes of water pollution

throat is connected to

water pollution

water pollution

water pollution

water pollution

wetlands

wetland areas =

wetland ecosystems important to living things because

impact of loss of wetlands:

how wetlands act as filters and improve water quality

how are wetlands being destroyed

what is biodiversity

how is biodiversity affected when wetlands are destroyed

what is water quality

explain how wetlands remove pollution from water