What is white powder

Today you will be a Forensic Chemist. 

A bag of white powder has been confiscated by airport customs.  You need to find out what white powder it is?

Aim: To learn about the makeup of different white powders.



There are a number of different white powders in our everyday life. Some of these are harmful and others are not. Test the four white powders listed to see which one has been found at the airport.

You will be given a small amount of 4 white powders on your cardboard. On the black cardboard using a magnifying glass look at the powders.

Look at them under your magnifying glass and record what you see. 

These are the four powders we will be using. Upload a photo of each powder. 

1.  Cornflour
2.  Baking Soda
3.  Salt
4.  Sugar 

Before you add the iodine, vinegar or water you will need to divide each powder into 3.

Materials

1.  Sugar
2.  Salt
3.  Cornflour
4.  Baking soda 
5.  Magnifying Class
6. Pipette
7. Cardboard
8. Vinegar
9. iodine6

Steps

1.
2.
3.
4.
5. 
6. 
7.

Findings:

Words to use: Absorbed, spread, frothed, fizzed, melted, blob,

	Sugar	Salt	Baking Soda	Cornflour
Appearance (White)	White	White	white	white
Grains (small, medium large)	medium	medium	medium	medium
Smell (Strong, none)	none	none	strong	light
Iodine	absorbed	absorbed/dried	absorbed/paster	rolled off, hardend
Water	absorbed	absorbed	absorbed	absorbed
Vinegar	absorbed	absorbed	froffy bubbles	rolled off

Write a conclusion about your findings. ( 4 plus sentences)
Use the Hexagon activity to give you some more ideas.

The sugar absorbed the Iodine, Water, and Vinegar.
The salt absorbed and dried the Iodine, Water, and vinegar.
The Baking Soda absorbed the Iodine and turned it into a paste, it absorbed the water
The cornflour.....




Do all the same experiments on the mystery white powder. What is it?

Decomposition🥀

Aim: To learn about the rate that different materials decompose. 

Hypothesis: I think that banana is going to decompose the fastest.

Materials:  

1. Banana
2. Bread  
3. Styrofoam
4.  Paper
5. Test tubes  
6. Bung
7. Test tube rack  
8. Water

Steps:

1.   Put the test tubes into the stand.
2.   Put the banana in one tube, the paper in another tube, Etc.
3. Put water into the bread tube.
4. We took it back to our table.
5.  We Wrote our names on a piece of paper and stuck it onto the stand.
6.   Placed the stand onto a surface where it won't be touched.
7.   Wait 5 weeks

Findings:

TODAY	Colour	Change	Observations
Banana	Yellow	-	-
Paper	Brown	-	-
Styrophone cup	White	-	-
Bread	Beige	-	-

3 weeks	Colour	Change	Observations
Banana	brown and a greenish colour.	Changed colour and rotted	the banana went from a smallish yellow piece to a brown disgusting smelly mess.
Paper	Brown	Nothing	Nothing had changed about the paper it was still brown and looked the same.
Styrophone cup	White	Nothing	Nothing had changed about the cup it was still white and looked the same.
Bread	Green, black and white	Change of colour	The bread was a normal beige colour at the start but slowly started changing colour.

5 weeks	Colour	Change	Observations
Banana	green	Changed colour.	The banana had gone very mouldy and disgusting.
Paper	brown	nothing	It looks the same
Styrophone cup	white	nothing	Looks the same.
Bread	white, brown and a creamy colour.	mouldy foam on the top.	The bread had turned into white mouldy foam and the water had turned into a beige creamy liquid.

  

Conclusion:
I personally think the banana moulded the fastest because in 3 weeks it had already started to look like the end result, The bread had also moulded very fast. In conclusion I don't think anyone should ever do this its very gross and smells.  

The Greenhouse Effect☂

Aim: To look at climate change and the greenhouse effect

Materials📋

1x Plastic bottle

1x Teaspoon Baking Soda and Citric Acid

1x heat lamp

1x Thermometer

100 ml water

1x rubber bung︵‿︵‿︵‿︵‿︵︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵　　

Steps📝

1. Add 100 mL of water to each of the beakers.
2. Prepare your lamps. Set them up next to each other with the necks angled
   so they will just fit over the tops of the bottles.
   Turn them on so they are ready.
3. Add Baking Soda mix to one of the beakers,
   and immediately cover both beakers with cling a rubber
   bung and thermometer. A tight seal around the edge will work best,
   and make sure thermometers are left visible so you can record the
   temperature.
4. Have students record the starting temperature –
    it should be the same in both beakers.
5. Turn the bottles so the thermometer is visible.                             
6. Record the temperature in both beakers every
   5 minutes for 50 minutes.
   

Minutes	Bottle 1: Water	Bottle 2: CO2 Gas
0	21	21
5	25	18
10	27	22
15	31	25
20	34	25
25	34	28
30	36	30
35	DNF	DNF
40	-	-
45	-	-
50	-	-

︵‿︵‿︵‿︵‿︵︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵‿︵　　

  

The Water Cycle

This week in science hurumanu also known as Climate Chaos we cut out 10 hexagons and explained why they are together.

This week for Climate Chaos we had to cut out 10 hexagons and explain how each of them went together.

Water Cycle is connected to Transpiration because transpiration is a step of the Water Cycle.

Transpiration and Water Vapour are connected because they are all the action of water vapour going up.

Water Vapour and Evaporation are connected together because they are from water (Oceans, Lakes, Rivers, Ponds) and the watering plants.

Water Vapour and Condensation are connected by when the water vapour rises it forms together to make clouds which is also part of the water cycle.

Evaporation and Condensation are connected because (evaporation) the water evaporates and rises and it clumps together to make clouds (condensation).

Condensation and Hurricanes are connected because Hurricanes can change the climate and the surface of the earth which can lead to disrupting weather patterns.

Water Vapour and Precipitation are  connected because water vapour goes up into clouds\\

Issues Of Climate Change

Aim: To learn about the different activities that contribute to climate change.

• Industry-  Factories make clothes, cars, electronics and processed fools that create pollution. 
• Transport- Most cars need gas or diesel to make them work. Gas and diesel come from oil. which is a fossil fuel.
• Waste- Landfills are covering more healthy land, and when it breaks down it makes greenhouse gasses.
• Cows- Cows create greenhouse gasses called methane when they burp and fart.
• Food- The food creates a lot of pollution, by having to transport it by ships, planes, trains, and trucks. 
• Electricity- Electricity is a form of energy used to power almost everything in our homes, Elcectrcity can come from renewable resources, but it can come from non-renewable rescourses. 

Hurumanu - Plants

AIM: TO LEARN ABOUT THE NATURE OF PLANTS

Carnivorous Plants

Plants fall into two categories:

1. Evergreen

2. Deciduous

Deciduous

Evergreen

Find three examples of each:

Evergreen: 

1.Magnolia 

2.Pine tree

3.Eucalyptus

Deciduous;

1.Oak 

2.Beech

3.Ashcv                    

LEAVES

Simple                                 Compound   

Activity: Choose a leaf and do a leaf rubbing. Once you have done the rubbing, cut it out and glue it on the tree.

LEAF COLLECTION

1.

Plant type: Deciduous / Evergreen

Leaf type: Simple / Compound

Photo of leaf:

2. 

Plant type: Deciduous / Evergreen

Leaf type: Simple / Compound

Photo of leaf:

3.  

Plant type: Deciduous / Evergreen

Leaf type: Simple / Compound

Photo of leaf:

4. 

Plant type: Deciduous / Evergreen

Leaf type: Simple / Compound

Photo of leaf:

5.  

Plant type: Deciduous / Evergreen

Leaf type: Simple / Compound

Photo of leaf:

RESEARCH 3 TYPES OF PLANT GROUPS

1. Carnivorous plants
2. Fruit trees
3. NZ Native trees

Plant group:

Habitat: (Desert / beach / mountains / swamp / plains / forest) 

Climate ( 1. Hot / warm / cold, 2. Rainy / dry 3. Windy / still )

Image: