Concept of Heat

Hello, for chemistry, our class has been learning about the effects of heat, there are four new words that we have learned about, they are conduction, convection, contraction, and expansion, here are their meanings.

Conduction is when the heat travels through the solid causing it to vibrate.

Convection is the same but it travels through a gas or liquid.

Contraction is when the solid becomes smaller, this happens when you cool it.

Expansion is the opposite, including the part when you cool it.

Examples: 

When you heat up a cube the cube becomes larger this is an expansion.

When the heat goes through the cube this will make it vibrate, this is called conduction.

When you cool the cube it will become smaller than it originally was, this is called contraction.

When you heat up a liquid, that will be called convection.

We have also done some experiments that explained these they used these: Contraction (imploding can), Expansion (ball and hoop), Conduction (dropping pins), Convection in liquid (permanganate crystal in water), Convection in gas (tea bag rockets)

Detailed Explanation

Conduction

Expansion and Contraction

Dirty water experiment

 Hello, for chemistry we made dirty water

Method:

1. Method:

   1. Use a 250mL beaker to get 200mL of water.

   2. Add 2 spoonfuls of dirt.

   3. Add 10mL of oil.

   4. Add a spoonful of pebbles

   5. Stir it for 2mins.

   6. Label a piece of paper with your names and place it under your beaker.

   7. Take a photo of your experiment.

   Early finishers can finish off a google doc

In the end, the water didn't turn out as good as expected 

Dirty water experiment 2

A week later we cleaned the water even more

here is the method we used

1. Stir your dirty water for 1min.

2. Using a measuring cylinder, measure 100mL of your dirty water into another beaker.

3. Add 100mL of water to the dirty water.

4. Stir for 2mins.

5. Discard the original 100mL of dirty water.

6. Repeat again.

7. Take a photo of your experiment.

And here is the setup for our next experiment

We put a cloth on a funnel over another funnel that has filter paper in it, the cloth is used to get rid of dirt, and the filter paper is used to get rid of small particles.

this has made a huge improvement to the water as now we can't see a single piece of dirt.

Digestive system

Hello, for chemistry today I've been doing dissections and the next one I'm doing is a rat dissection. Before I start the dissection I have to learn about the important organs that make up the digestion system, the organs that I will be learning are the esophagus, stomach, small intestine, liver, and large intestine.

I'll be explaining these in their order above first is the esophagus, this organ is the first organ that the food goes through it connects the mouth to the stomach, this organ is used to break down the food before it gets to the stomach.

The stomach, this organ is where the food is broken down more using stomach acid.

The small intestine, this organ is next it is also used for breaking down food and so is the large intestine, did you know that the small intestine is seven meters long?

The large intestine, this organ is exactly like the small intestine it doesn't need much explaining but it is five feet long and three inches in diameter.

The liver, the purpose of the liver is to regulate the levels of chemicals in the body and to make it easier to digest.

There are four keywords that are used to explain digestion these are.

Ingestion is the intake of food.

Digestion is the process of consuming the food

Absorption is the process of converting food into energy 

Egestion is where you excrete the food out of the body

I hope you learned about the digestion system bye.