Science Exam Revision For Year 8

Front 1

Cells

Back 1

Building blocks of the body.

Front 2

Tissue

Back 2

Similar cells working together in the same way.

Front 3

Organs

Back 3

Groups of tissue working together.

Front 4

Systems

Back 4

A group of organs working together.

Front 5

Prokaryotic cells

Back 5

Very basic cell with a nucleus and a membrane. Genetic material floats around the cell.

Front 6

Eukaryotic cells

Back 6

More complex cells with a double-walled membrane and many organelles.

Front 7

Nucleus

Back 7

Controls actions and reactions of the cell. Also holds DNA.

Front 8

Cell membrane

Back 8

Controls what comes in and out of the cell. Also helps hold the cell together.

Front 9

Mitochondrion

Back 9

Breaks down food and water to make energy.

Front 10

Cytoplasm

Back 10

Where all chemical reactions in the cell take place.

Front 11

Vacuole

Back 11

Stores food and water. Also helps keep the shape of the cell.

Front 12

Chloroplasts

Back 12

Absorbs light for photosynthesis

Front 13

Cell wall

Back 13

Supports the cell, keeps it protected and holds the shape.

Front 14

MRS C GREN

Back 14

Movement, Respiration, Stimuli, Cells, Growth, Reproduction, Excretion, Nutrition

Front 15

Objective Lens

Back 15

The lens closest to the stage.

Front 16

Ocular Lens

Back 16

The lens closest to your eye.

Front 17

Coarse focus knob

Back 17

Used to focus an image on low power.

Front 18

Fine focus knob

Back 18

Used to focus an image on high power.

Front 19

Handle

Back 19

Used to carry the microscope.

Front 20

Stage

Back 20

Where the specimen is placed.

Front 21

Common magnifications

Back 21

40x, 100x, 400x.

Front 22

Red blood cell

Back 22

Carries oxygen around the body.

Front 23

White blood cell

Back 23

Fights viruses in the body.

Front 24

Sperm cell

Back 24

Designed to fertilises eggs. Found in the testes.

Front 25

Egg cell

Back 25

Designed to be fertilised. Found in the ovaries.

Front 26

Palisade cell

Back 26

Designed for photosynthesis. Found in the top of a leaf.

Front 27

Ciliated cell

Back 27

Designed to prevent lung damage. Found in the air passages of the lungs.

Front 28

Root hair cell

Back 28

Designed for absorbing. Found in a plant root.

Front 29

Nerve cell

Back 29

Designed to carry electrical signals to different parts of the body.

Front 30

Digestive system

Back 30

Digests food and water

Front 31

Parts of the digestive system

Back 31

Mouth, oesophagus, stomach, liver, pancreas, ball bladder, small intestine, appendix, large intestine, rectum, anus.

Front 32

Respiratory system

Back 32

Allows your body to breath in oxygen and breath out carbon dioxide.

Front 33

Parts of the respiratory system

Back 33

Trachea, Bronchus, Bronchi, Bronchiole, Aveoli.

Front 34

Circulatory system

Back 34

Pumps blood around your body to keep it functioning.

Front 35

Parts of the circulatory system

Back 35

Heart, arteries, arterioles, capillaries, venules, veins, right atrium, left atrium, right ventricle, left ventricle.

Front 36

Excretory system

Back 36

Gets rid of waste from the body.

Front 37

Parts of the excretory system

Back 37

renal vein/artery, kidney, cortex, medulla, pelvis, ureter, bladder, urethra.

Front 38

Platelets

Back 38

Small disk-shaped blood fragments in bone marrow used for blood clotting.

Front 39

Plasma

Back 39

Straw coloured substance that makes up most of blood. Transports carbon dioxide back to the lungs.

Front 40

Nephron

Back 40

Nephrons filter and reabsorb sunstances in the kidneys.

Front 41

Chemical digestion

Back 41

Breaking down food by chemicals in saliva.

Front 42

Mechanical digestion

Back 42

Physically breaking down food with teeth.

Front 43

Peristalsis

Back 43

A series of wave-like muscle contractions that moves food into different processing stations.

Front 44

Epiglottis

Back 44

Covers oesophagus to stop air entering the digestive system and vice versa.

Front 45

Deposition

Back 45

When rock sediments are dumped by weathering.

Front 46

Weathering

Back 46

Breaking materials into sediment.

Front 47

Erosion

Back 47

Weathered rock is carried away by gravity, water, wind and ice.

Front 48

Extrusive igneous rocks

Back 48

Rocks formed by lava cooling outside the volcano. Have small crystals,

Front 49

Intrusive igneous rocks

Back 49

Rocks formed by magma cooling inside the volcano. Have large crystals.

Front 50

Sedimentary rocks

Back 50

Rocks formed by layers of sediments being glued together over time.

Front 51

Metamorphic rocks

Back 51

Rocks formed by other rocks having heat and pressure applied to them.

Front 52

Cast fossils

Back 52

Fossils that have had a mineral fill in the shape of what was originally there to make a cast.

Front 53

Imprint fossils

Back 53

Fossils formed by dead animals or plants leaving marks in a rock.

Front 54

Actual remains fossils

Back 54

Actual remains of an animal or plant such as teeth or bones.