Term 3 Week 2 2019

Trebuchet

Designing a Trebuchet – Optimizing Weight and Length

Optimisation of Trebuchet:

1. The length of the payload arm should be 3.75 times longer than the counterweight arm.
2. The length of the sling should be the same length as thepayload arm.
3. The initial angle between the counterweight arm and the support should be 45 degrees at launch.
4. The counterweight needs to be 133 times as heavy as your intended projectile.

How to design the perfect trebuchet

Optimising a Trebuchet

Wheels on a Trebuchet

Giant Trebuchet

Most powerful trebuchet in the world

Student's Trebuchets

Fastest People in Slow Mo

How fast does glass crack?

Week 1 Term 3 2019

Velocity - Distance - Time

• Speed (Velocity) is a change in distance per unit time. SI unit: meters per second (m/s)
• Distance is a length. SI unit: meters (m)
• Time is needed for things to change. SI unit: second (s)

Using the S,D,T Triangle

Distance Time Graphs

Week 6 Term 2 2019

Science Fair

Hands-on Science Resources for Home and School

1st place science fair ideas- 10 ideas and tricks to WIN!

How to make a Hydrometer

The Syphon

Siphon Explained by Doctor C

Bernoulli's Equation Explained

Term 2 Week 1 2019

Human Digestive System

Rat Dissection in Lab A comming soon

How your digestive system works

Inside the Stomach

Pill Camera Swallowed

Tapeworm Infestation

What does the liver do?

What does the pancreas do?

How do your Kidneys do?

How the heart actually pumps blood

The Heart, Part 1

Heartbeat sound

Transporting a beating heart for transplant!

How do vitamins work?

How sugar affects the brain

What is fat?

How do carbohydrates impact your health?

Food Tests

Food TestsFood Tests:

Test	Tests for	Positive Result	Method
Iodine	Starch	Turns Blue-Black	Add a drop of iodine to food solution
Biuret (CuSO4 + NaOH)	Protein	Turns Purple-Lavender	Add a few drops of copper sulphate (CuSO4) shake and wait, then and sodium hydroxide (NaOH) to food solution
Benedict’s Solution	Sugar	With heat turns Brick-Red precipitate	Add a few drops of Benedict’s to food solution and heat gently of a bunsen
Ethanol Emulsion	Fats	White Emulsion	Add 2ml of ethanol to food solution and shake/mix, then add 2ml of water to solution and shake/mix
DCPIP	Vitamin C	Turns Colourless	Add a few drops of DCPIP to food solution and shake/mix then wait (NB: will turn pinky due to the presence of acid - false positive)

Term 1 Week 9 2019

Ocean Acidification
When carbon dioxide dissolves in this ocean, carbonic acid is formed. This leads to higher acidity, mainly near the surface, which has been proven to inhibit shell growth in marine animals and is suspected as a cause of reproductive disorders in some fish.

Climate Change

Ocean Acidification

Demystifying ocean acidification and biodiversity impacts

What is Ocean Acidification - NIWA

Ocean Acidification - NIWA

Ocean Acidification and Warming - NIWA

Cheeseburger in Hydrochloric Acid

Can of Coke in Liquid Nitrogen

Cordyceps: attack of the killer fungi

Term 1 Week 8 2019

Acids & Bases

Acids and Bases Explained in Under 10 minutes

Acid Base Reactions

The strengths and weaknesses of acids and bases

Naming Acids Introduction

Introduction to Balancing Chemical Equations

PhET Balancing Chemical Equations

Balancing Chemical Equations Practice Problems

Spider With Three Super Powers

Kung Fu Mantis Vs Jumping Spider

Antlion Cone Death Trap

Lightfoot crabs ambushed by eels and octopuses

Army Ants Rampage Through The Forest

Hatching Of Tuatara Cannibals

Troglobites: Strange Cave Specialists

Term 1 Week 7 2019

Breathing Nobel Gasses

Table of Ions

Note:

• Fe2+ is called Iron(II) this will combine with O2- oxide as FeO Iron(II) Oxide (black iron-oxide)
• Fe3+ is called Iron(III) this will combine with O2- oxide as Fe2O3 Iron(III) Oxide (red rust)
• S2- is called the Sulphide Ion and is different to SO42- the Sulphate Iron

Valence Electrons & the Periodic Table

What is an Ion?

Ionic Bonding Introduction

Ionic Bonding Part 2

Ionic Bonding Part 3

Writing Ionic Formulas: Introduction

What's a polyatomic ion?

Writing Formulas with Polyatomic Ions