science

• What is a decomposition reaction?


  when a compound is broken into simpler compounds or elements
• How can you tell if carbon dioxide is present in something?

  you can bubble it through limewater and if it turns cloudy that means C02 is present.
• what is thermal decomposition?

  when a substance breaks down on heating
• When you complete a circuit, what moves in the metal wires?

  charged particles or charges
• What is current?


  The amount of charge flowing per second
• How do you measure current?

  Ammeter
• current is measured in?

  amperes (amps)
• what is the symbol for amps?

  A
• where do the charges come from?

  the cell or battery pushes charges around the circuit, but does not produce them, they were already there in the wires
• in a metal what are the charged particles?

  electrons
• Energy can be transferred between different forms, but it cannot be created or destroyed.
• The three main types of energy transfers are mechanical, electrical and thermal
• energy transformation occurs when energy changes form
• energy transfer occurs when energy moves from one place to another
• Energy can be transferred from one form to another, but it cannot be created or destroyed.
• Examples of energy transfers include burning wood to produce heat, using wind turbines to generate electricity from kinetic energy, and converting chemical potential energy stored in food into mechanical work during exercise.
• What are multicellular organisms?

  organisms that are made up of many cells, They contain organ systems to perform their life processes
• How many layers of organisation does a multicellular organism have and what is this called?

  6, and its called a hierarchy.
• Cells are which level of organisation, what are they, as well as some examples of them ?

  The building blocks of life - they are the 2nd level of organisation and include cells such as blood cells, nerve cells etc.
• What are cells made up of?

  organelles - these are the components of the cell, etc. nucleus.
• what level of organisation do organelles belong to?

  level 1- the smallest unit
• What are tissues?


  a group of similar cells that work together to perform a certain function - 3rd unit of organisation.
• whats an example of a plant tissue?

  the xylem- tubes that carry water around the plant
• what are two examples of animal tissue?

  - nervous tissue - nerve cells work together to transmit messages around the body

  - muscle tissue- contract together to make the body move.
• What is an organ?

  A group of different tissues that work together to perform a certain function. they are the 4th unit of organisation.
• What is an organ system?


  A group of organs working together to perform a particular function
• what is one example of an organ system?

  the circulatory system- transports materials around the body in the blood.
• name one example of an organ system in plants.

  flowers are an organ system as they contain both female and male reproductive organs meaning together they form the reproductive system.
• What is the last level of organisation?

  the 6th and final unit is a multicellular organism.
• what is a multicellular organism made up of?

  several organ systems working together to perform all the processes needed to stay alive.
• What is the conservation of Mass?

  when the total mass of the products is equal to the total mass of the reactants
• what does balance symbol equations show?

  - the formulae of reactants and products

  - how the atoms are rearranged

  - the relative amounts of reactants and products
• What are multicellular organisms?

  organisms that are made up of many cells, They contain organ systems to perform their life processes
• How many layers of organisation does a multicellular organism have and what is this called?

  6, and its called a hierarchy.
• Cells are which level of organisation, what are they, as well as some examples of them ?

  The building blocks of life - they are the 2nd level of organisation and include cells such as blood cells, nerve cells etc.
• What are cells made up of?

  organelles - these are the components of the cell, etc. nucleus.
• what level of organisation do organelles belong to?

  level 1- the smallest unit
• What are tissues?


  a group of similar cells that work together to perform a certain function - 3rd unit of organisation.
• whats an example of a plant tissue?

  the xylem- tubes that carry water around the plant
• what are two examples of animal tissue?

  - nervous tissue - nerve cells work together to transmit messages around the body

  - muscle tissue- contract together to make the body move.