Term 2 Project : Cells!!

The Analogy Cell

Materials:

  • Poster board
  • Magazines and newspapers
  • Scissors
  • Paste
  • Markers

What to Do:

First, you will need to decide if you’re focusing on plant or animal cells. Once you decide, you will need to research the structures of each cell. You must  determine what function each of these structures serves. Next, you will need to find some kind of larger object that performs the same function in your day-to-day life. For example, a chloroplast is similar to a restaurant in that it gathers raw materials and uses them to produce food we can eat. Use newspapers or magazines to locate and cut out pictures that correspond to these real-world objects.

You complete this project by drawing your cell on your poster board and including the structures you found analogies for. You should then paste pictures of the objects you found around the cell, including an explanation on how these objects are like the cell part they are analogous to.

This chapter on the parts of cells can help you review what you need to know you begin this project. These video lessons are short and easy to understand, allowing you to brush up on the functions of different parts of cells.

 

Household Items Cell

Materials

  • Rectangular container with lid
  • Tape
  • Paper
  • Uncooked pasta noodles
  • String
  • Beads
  • Toothpicks
  • Sticky tabs

Steps

1. Cover sides of container with paper or tape.

2. Use household items as cell parts and place on lid of container.

3. Label the parts of the cell by creating a legend to go along with your model.

Play Dough Plant Cell

Steps

1. Lay out a piece of plastic wrap.

2. Place play dough on the plastic wrap and flatten to plant cell shape.

3. Use different play dough colors to design the parts of the cell.

4. Press parts into flattened play dough section.

5. Use toothpicks and sticky tabs to label cell parts.

Edible 3-D Model Using Gelatin

To create this type of 3-D model, you will need to first make gelatin. Light colors work best because they allow you to easily see through your model. Make sure to use slightly less water than usual, as this will create a more solid substance that will help your cell parts stay in place.

Once the gelatin is cool, pour it into a plastic bag. You may find it easier to do this if you place the plastic bag into a container. Leave some space in the bag so that all of your cell parts will fit. Then, close the bag and put it into the refrigerator to finish cooling.

When the gelatin is almost ready, begin to add your cell parts. You can use gummy worms, M&Ms, gumdrops or licorice to serve as the parts of the cell. Once you have included all of your cell parts, seal up the plastic bag and put it back in the refrigerator to finish setting. The best part about this cell model project is that it can be eaten when you’re all finished, so make sure to include your favorite candies as your cell parts!

Plant Cell Cake

Materials

  • 9×13 baking dish
  • Cake batter
  • Cutting utensil
  • White frosting
  • Fondant icing
  • Food coloring

Steps

1. Bake the cake.

2. Use your cutting utensil to shape the cake like a plant cell.

3. Add the white frosting to the cake.

4. Use the fondant and food coloring to make the different cell parts.

5. Place the various cell parts on top of the cake.

 

Most of the work in this project involves making the ‘cytoplasm.’ To learn more about its function and why it’s important, view this lesson on the cytoplasm.

Here´s a link for more ideas on making models.

 

And these links might help to learn more about cells!!

Rubric for  oral presentation

Rubric

 

 

Groups:

1  Analogy Cell. Animal cell:     Sebastián, Juana FC, Pilar L, Nacho O

Household items Cell. Plant cell:    Fico, Nina, Jose LL, Rosario

Play Dough Plant Cell:    Juanma, Mariano, Sofía, Santi O

Edible 3D  Model Animal Cell:   Luisa, Beltrán, Milena, Catalina

5  Plant Cell CakeJose P, Bernardita, Bauti S, Ignacio G

Analogy Cell.  Plant Cell:   Mateo, Mora, JuanaT,  Santino

 

Remember we are all going to assess all the work following the rubric.

Your work will be seen and shared at school. And it must also be shared on your blogs.

Remember to describe all the process:

how you got organized

where you got the info

any drawbacks and how you solved them

any possible improvement for your next project

 

Due date:       Thursday June 13th

 

Publicado en Senior 1 2019 | Deja un comentario

May Term Test

Dear Senior 2, as I have told you, the contents for the coming term test are the following:

  • Continuous and discontinuous variation
  • mutation and what causes it
  • sickle cell anaemia
  • adaptation to the environment
  • natural selection
  • selective breeding
  • antibiotic resistance in bacteria
  • stabilising selection

Biology Book, Chapter 19 and entries on my blog.

Pay special attention to all key definitions.

And remember you may practise using the multiple choice questions and answers in your CD. And the self assessment  and end of chapter questions shared in your book.

 

 

Publicado en Senior 2 2019 | Deja un comentario

May Term Test

Dear Senior 1, these are the contents you need to revise for the coming Term Test

  • Characteristics of living things
  • Classification of living things. Using DNA. Classification system. Binomial naming system
  • Kingdoms of living organisms. Animals, plants, fungi, protoctista, prokaryotes.
  • Viruses
  • Classifying animals. Phylum Vertebrates. Fish, amphibia, reptiles, birds, mammals. Pyhlum Arthropods. Insects. Crustaceans. Arachnids. Myriapods.
  • Other invertebrates: annelids, molluscs and nematodes
  • Classifying plants. Ferns. Flowering plants. Monocots and dicots.
  • Differences between animal and plant cells.
  • Differences between prokaryotic ( bacteria ) and eukaryotic cells ( animal and plant cells )
  • Making biological drawings.
  • Calculating magnification.
  • Keys ( how to use them to identify an unknown organism

Pay special attention to KEY DEFINITIONS.

Remember you may practise multiple questions using the CD, as well as the self – assessment and end of chapter questions you have in the book.

Publicado en Senior 1 2019 | Deja un comentario

Taking care of our body

Caring for myself, caring for my friends!!

The more we know something/someone, the better we can take care of it / him/ her.

This new project will help us know  more about ourselves, our bodies and how they work.

Adolescence is a particular stage in our lives. Our behaviour can sometimes put at risk our own bodies and that of our friends.

The more we know about this, the better we´ll be able to take care and avoid risky decisions…

During this project we will be learning about the structure and function of the digestive, excretory, circulatory and respiratory systems.

There are some decisions and actions that can seriously harm them, learning about them, will help us avoid or correct them.

Let`s start right now!!

https://kidshealth.org/en/teens/body-basics.html

Groups

  • DIGESTIVE  SYSTEM    Mati C, Santi Y, Paz , Facu      8
  • NERVOUS  SYSTEM    Feli, Juana N, Caro     8  + MUSCLE AND BONES   Fede  5
  • RESPIRATORY SYSTEM Emilia, Mora, Valentina and Serena   9
  • CIRCULATORY SYSTEM  Nico Larralde, Nico Grosso and Lucas    8
  • EXCRETORY SYSTEM  Mati Carreira, Juansi and Manuel    9
  • IMMUNE SYSTEM   Tomás, Santi G and Mati Hartmann      8

 

Wed May 15th

+ Understanding concept of   SYSTEM

+ Doing research and collecting info on the chosen system

 

Wed May 29th

We work on an oral presentation to share with classmates next week.

Each group has 15 minutes to describe structure, function, main features of the body system and will be evaluated following a rubric.

peergradingrubric12-141030142454-conversion-gate02

 

Tue 4th and Wed 5th June

Oral presentations

Tue 11th

Multiple Choice Test

Tue 18th

Correction of multiple choice test

Wed 19th  

 Tue 25th and  Wed June 26th

Working on risky behaviour that may affect the body system.

Include ALCOHOL after  doing research on how this affects your system.

 

Sharing blogs  to learn about risky behaviour and its consequences.

 

Smoking

We do resarch to add its effects on the different systems.

Tue 2nd and Wed 3rd July

We share effects of smoking with your classmates.

Wed July 10th

Multiple choice Test on systems

Tue 16th and Wed 17th July

Designing a campaign to convince and make everybody at School see the need to take care of ourselves.

Sharing all you learnt with 6th formers ( Primary )

Just to help with resources for the oral presentations …

 

 

https://www.sciencebuddies.org/science-fair-projects/project-ideas/HumBio_p036/human-biology-health/immune-system-memory#procedure

 

https://sciencing.com/excretory-system-science-project-ideas-7921096.html

Publicado en Senior 2 2019 | 1 comentario

Effect of catalase on hydrogen peroxide

This is Activity 5.1 ( Biology Book, page 52 )

Wear eye protection if available.
Hydrogen peroxide is a powerful bleach.
Wash it off with plenty of water if you get it on your skin.

Catalase is found in almost every kind of living cell.
It catalyses this reaction:

hydrogen peroxide is broken down to water and oxygen

1. Read through the instructions. Decide what you will observe and measure.
2. Draw a results table.
3. Measure 10ml or cm3 of hydrogen peroxide into each of the test tubes.
4. To 1 test tube, add chopped raw potato. Label it.
5. To the other test tube, add chopped boiled potato.
6. Light a match, and then blow it out, so that it is glowing. Gently push it down through the bubbles in each tube.
7. Record your observations, and explain them as fully as you can.

Next Wednesday, we will try again with some fruit juice and a small piece of liver.

Then we will compare results.

Publicado en Lab, Senior 1 2019, Senior 2 2019 | Deja un comentario

How life started: Endosymbiotic Theory

What if our complex cells evolved from bacteria?

After watching both videos:

* write 5 questions about each of them

* write a metaphor with which you could summarize what you have learnt

We`ll share this in class next Wednesday!!

Publicado en DHsecundaria, Senior 1 2019, Senior 2 2019 | 19 comentarios

Using a Bunsen Burner

We often need to heat materials in a lab.

One of the most efficient ways to do this is to use a Bunsen Burner.

Bunsen burners are made in a variety of designs. In every one, however, the burner functions by the combustion of a mixture of air and gas. In most burners, the amounts of air and gas can be controlled. In some situations, portable burners are used instead of Bunsen burners. Electric hot plates may be used as well.

Aim

In this investigation, you will learn the parts of the Bunsen burner and their functions. You will also learn how to use the burner safely in the lab.

https://images.app.goo.gl/quDYRkZKwjXBbQDB7

 

Method

  1. Close air-hole
  2. Turn the gas tap and light the burner.
  3. Record the results  ( colour of flame )
  4. Open air hole slowly until it is half-closed open and record results
  5. Open it completely and record results
  6. Place a tripod and gauze on the burner
  7. Place a beaker with 50 ml of water
  8. Heat it with the air hole open
  9. Take the time until the water starts boiling
  10. Change the beaker and water and heat it with the air – hole closed
  11. Take the time until the water boils

Table of results

 

Conclusion

a) Which flame is stronger? …………………………………………..

b) Why is it important to make sure that the volume of water and the starting temperature are the same in each trial?

……………………………………………………………………………………………………………………….

Publicado en Lab, Senior 1 2019, Senior 2 2019 | Deja un comentario

Measuring temperature in the lab

Today we are measuring the temperature of water when is heated every 1 minute.

a) Identify

  • independent variable:  …………………………………..:
  • dependent variable:  ……………………………………..
  • fixed variables

AIM: ………………………………………………………………………………………………………..

Materials:

 

 

 

Method

1   Build a table of results

2   Fill a beaker with 100 ml of water.

3   Take the temperature of water

4  Record it at 0  in your table of results

5  Put the beaker on a tripod and gauze

6  Light the burner and heat the water

7  Place a thermometer so that it doesn`t touch the beaker

8   Take the temperature  every 1 minute until 2 minutes after the water boils and record results in the table

9  Draw a line graph with your results

* Table of results

* Line graph

10  Conclusion  ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

Publicado en Lab, Senior 1 2019 | Deja un comentario

Looking at cells under the microscope!!

We were able to see all this!!!

 

Publicado en Senior 1 2019 | Deja un comentario

Be careful in the lab!!!

We need to be careful when working in the lab, to avoid accidents and harm ourselves or somebody else…

Let´s remember some lab safety rules!

Now we write our own lab safety rules together to work in the lab this year!

 

We need to know the lab material we´ll be working with…

Let´s revise to remember names!

https://quizlet.com/13633713/lab-equipment-names-and-pictures-flash-cards/

Publicado en Senior 1 2019, Senior 2 2019 | Deja un comentario