Displaying 31 - 40 of 367 Resources

Biodiversity and natural selection

Patterns and processes of evolution. How evolution and natural selection are reflected in the similarities and differences of organisms. 

Subject and Topic
Form 2
Biology
Balance of nature
The natural environment
Resource Type
Video
Language
English
Publisher
California Academy of Sciences
Publication Date
2014
Creator/Author
California Academy of Sciences
Keyword
Biodiversity
Natural selection

Breaking down photosynthesis stages

Breaking down photosynthesis into light dependent reactions and Calvin cycle..

Subject and Topic
Form 1
Biology
Introduction to biology
Concept and terminologies of biology
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2016
Creator/Author
Sal Khan
Keyword
Photosynthesis

Calculating Gravitational Potential Energy

Forces at a distance are explained by fields (gravitational, electric, and magnetic) permeating space that can transfer energy through space. Magnets or electric currents cause magnetic fields; electric charges or changing magnetic fields cause electric fields. 

Subject and Topic
Form 1
Physics
Work, energy and power
Energy
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2021
Creator/Author
Sal Khan
Keyword
Gravitational Energy
Energy
Magnetism

Calculating height using energy

Learn how you can calculate the maximum height of a launched object by using the total energy of a system. Energy that is conserved can be transferred within a system from one object to another changing the characteristics of each object, like position. 

Subject and Topic
Form 1
Physics
Work, energy and power
Energy
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2021
Creator/Author
Sal Khan
Keyword
Energy
Final Velocity

Calculating kinetic energy

Mathematical expressions, which quantify how the stored energy in a system depends on its configuration (e.g. relative positions of charged particles, compression of a spring) and how kinetic energy depends on mass and speed, allow the concept of conservation of energy to be used to predict and describe system behaviour.

Subject and Topic
Form 1
Physics
Work, energy and power
Energy
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2021
Creator/Author
Sal Khan
Keyword
Kinetic Energy
Energy

Calculating velocity using energy

Learn how you can calculate the launch velocity of an object by using the total energy of a system. Energy that is conserved can be transferred within a system from one object to another changing the characteristics of each object, like velocity.

Subject and Topic
Form 1
Physics
Work, energy and power
Energy
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2021
Creator/Author
Sal Khan
Keyword
Velocity
Energy

Calculations on motion in one dimension

In this unit you will apply your understanding of the components of motion in one dimension using linear equations. This will help you to solve problems about motion in one direction and equip you to understand how these concepts apply to everyday life.

There are three equations for linear motion with constant acceleration. They can be used to calculate, and therefore predict, the outcome of motion when three out of the four variables are known.

Subject and Topic
Form 2
Physics
Motion in a straight line
Speed and velocity
Resource Type
Werkbladen en klassikale activiteiten
Language
English
Publisher
Department of Higher Education
Publication Date
No date
Creator/Author
Leigh Kleynhans
Contributor
Michael Atkinson
Keyword
Motion
Initial Velocity
Final Velocity
Acceleration

Cell theory

Introduction to cell theory--the idea that 1) all living things are made of one or more cells, 2) cells are the basic unit of life and 3) all cells come from other cells. Explore the roles that Hooke, Leeuwenhoek and others played in developing cell theory.

Hooke and Leeuwenhoek were two of the first scientists to use microscopes to study the microscopic world of cells. Hooke coined the term "cell" after observing the tiny compartments in cork, while Leeuwenhoek discovered a variety of living creatures in pond water, blood, and other samples. They contributed to the cell theory by suggesting that cells are the fundamental units of life and structure, and that all living things consist of one or more cells that originate from other cells by division. 

Subject and Topic
Form 1
Biology
Cell structure and organisation
Concept of cells
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2015
Creator/Author
Sal Khan
Keyword
Cells

Cells and organisms

All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular).

Subject and Topic
Form 1
Biology
Cell structure and organisation
Concept of cells
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2022
Creator/Author
Khan Academy
Keyword
Cells

Charges and Fields

  • Determine the variables that affect the strength and direction of the electric field for a static arrangement of charges.
  • Investigate the variables that affect the strength of the electrostatic potential (voltage).
  • Explain equipotential lines and compare them to the electric field lines.
  • For an arrangement of static charges, predict the electric field lines. Verify the prediction using vector addition.
Subject and Topic
Form 1
Physics
Force
Types of forces
Resource Type
Simulatie
Language
English
Publisher
pHET Interactive Simulations
Publication Date
No date
Creator/Author
Amy Rouinfar (lead designer - HTML5)
Keyword
Electric Field
Voltage
Electrostatics