Mary - Science Revision

Revision:

1. What is a cell? How it is related to all organisms? The building blocks of life.
2. Draw a typical cell and label it.
3. Differentiate between plant cell and animal cell. Plant cells can be larger than animal cells. Although plant and animal cells have many similarities, plant cells have vacuoles, a cell wall and chloroplasts.
4. Write the functions of cell wall, cell membrane, cytoplasm, mitochondria, vacuole, chromosomes and gene.

Cell Wall - Provides Strength for the plant.

Cell Membrane - Hold everything inside and controls what comes in and out.

Cytoplasm - Holds the cell organelles and contain nutrients and chemical.

Mitochondria - Holds out respiration to give the cell energy.

Vacuole - Helps keep the cell firm.

Chromosomes - A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.

Gene - A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

5. Define Photosynthesis and explain the process. Give chemical and word equation. Photosynthesis is a process in which plants prepare their food in the presence of sunlight, by taking carbon dioxide from the environment and water from the Earth.

Equation:

6. Define Respiration and explain the process. Give Chemical and word Equation. Respiration is the process that the body uses to relate energy from digested food(glucose).

Mary - Cells

For science this year, 10KLE learnt about Living and Non-Living things, A Cell Structure and also Functions of Cell Parts(Organelles).

Living & Non-living Things:

I have learnt that the study of living things is called Biology. There are seven characteristics that a Living thing show, Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition. Some non-living things show one or two of the seven characteristics of living things, such as Machines like washing machines. They can move, but only if it has some type of energy resource to get it moving.

Non-living things can be divided into two groups:

First come those which were never part of a living thing, such as stone and gold.

The second group are those which were once part of living things, such as coal. Coal was formed when trees died and sank into the soft ground. Paper is also another example of a non-living thing that was once living, because it was made from trees. Jam is another example of a non-living thing that was once part of a living thing, this is because it was made from the fruit of a plant.

A table showing what Living and Non-living things can do:

Living Things	Non-living Things
They can grow	They can’t Reproduce
They can reproduce	They can’t Grow
They can Move on their Own	They can’t move, only if a energy resource helps it to.
They can Sense	They can’t Excrete.
They can Respire	They can’t Sense

Labelled Cell - Animal Cell & Plant Cell:

Cell Parts & Their Function:

Cell Membrane: Very thin transparent sheet. Holds everything inside and controls what comes in and out..

Cell Wall: Made of cellulose and only found in plants, also thick and strong. Provides strength for the plants.

Nucleus: Small dark circular spot. The control center for the cell and contains genes.

Cytoplasm: Watery jelly like substance which fills most of the cell. It holds the cell organelles and contains nutrients and chemicals.

Vacuole: Water filled bubble. Helps keep the cell firm.

Chloroplasts: Small green structure found only in the green part of plants. They make sugar for the plant.

Mitochondria: Squiggly green thing. The part of the cell that does respiration to give the cell energy.

Photosynthesis:

What is Photosynthesis? Photosynthesis is a process in which Carbon Dioxide and water are used by the plants to produce carbohydrate and oxygen in the presence of sunlight.

What are the substances required? The substances that are required for photosynthesis are, Water from the soil, carbon dioxide from the air, energy from the sunlight which is then absorbed by the chlorophyll in the chloroplasts of leaf cells.

Mary, Melissa, Kacia and Keti - Bacteria and Cells

This week for Science we had to get into groups and create a DLO(Digital Learning Object) about what we have learnt so far on the topic we studied for the term, Cells and Bacteria. Hope you learn something from it!

Prokaryotic and Eukaryotic Cells

Today for Science me and my friend Keti learnt about the two different cells called Prokaryotic and Eukaryotic Calls.

Prokaryotic Cells:
Most organisms of one cell are these cells, more simpler, has organelles - don't have a membrane, their DNA is circular and naked.

Eukaryotic Cells:
Organisms made if many cells are made of these cells, They have organelles that have membranes around them and perform functions within the cell. Also animal and plant cells are Eukaryotic, .