8Science9 Task 2 Flashcards

Flashcards about structure and properties of matter and cells

Element

Substance made of only one type of atom

Compound

Substance made up of two or more different elements chemically bonded together

Mixture

Substance consisting of two or more substances not chemically combined together

Internationally recognised symbols

Enables people from different countries to have a common language

Copper (Cu)

Shiny, bronze, ductile, conduct electricity, metal

Sulfur (S)

Yellow, brittle, dull, doesn’t conduct electricity, non-metal

STM (Scanning Tunnelling Microscopy)

Enable us to see the atomic structure of elements like copper and when we know this we can understand their properties

TEM (Transmission Electron Microscope)

Create a 3D or closer image of an object (viruses, protein, etc.)

NaCl

Sodium Chloride

CuSO⁴

Copper Sulfate

HCl

Hydrochloric Acid

CO²

Carbon Dioxide

NaOH

Sodium Hydroxide

Chemical Change

Creates new substances

Physical Change

Form and state of substance

Photosynthesis

Plants convert carbon dioxide and water into glucose + oxygen using sunlight

Rusting of iron

Iron reacts with oxygen & water to form iron oxide (rust)

Cells

All living things are made of cells, which is the basic unit of life

Movement

Ability of organisms to move

Respiration

Set of chemical reactions take place in our cells

Sensitivity + control

Ability to detect/respond to changes in internal/external environment

Growth

Permanent increase in dry mass & size

Reproduction

Process of more of the same organism

Excretion

Removal of waste products of metabolism

Nutrition

Taking in materials for energy

Nucleus

Controls the cell’s activities and contains DNA

Cytoplasm

Jelly-like fluid where chemical reactions happen

Cell membrane

Controls what goes in and out of the cell

Mitochondria

Where energy is released in respiration

Cell wall

Made of cellulose; gives strength and structure

Chloroplasts

Where photosynthesis happen; contains chlorophyll to absorb light

Permanent vacuole

Contains cell sap; helps support the cell