1 Living organisms
Topic 1 Biology
CLASSIFICATION AND VARIATION
1 Living organisms
Living things are made of tiny units called cells. Cells help living organisms to carry out one or more of the following life processes.
Draw lines to match each process to its definition.
M
MOVEMENT
R RESPIRATION
Get energy from food. Gets bigger or number of cells increases.
S
SENSITIVITY
Gets rid of waste products.
G
GROWTH
R REPRODUCTION
E
EXCRETION
N
NUTRITION
Intake of particles for food. Makes more living organisms. Responds to what is going on around them. The living things can change direction.
Make up a sentence to help you remember MRS GREN. For example, you could use My Robot Should Go Round Every Night. M________________ R_______________ S_________________ G________________ R________________ E________________ N_________________
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
CLASSIFICATION AND VARIATION
2 Animal and Plant cells
Animal cell
Look at a picture of an animal cell and read the descriptions in the boxes below.
Use these to help you label parts 1, 2 and 3 of the diagram below. Use the words from this box for your labels.
cell surface membrane
cytoplasm
nucleus
Contain
chromosomes
1
Watery liquid
2
Controls what
enters or leaves a
cell
3
Plant cell
Look at a picture of a plant cell. Draw the chloroplasts and a vacuole on the diagram below and label them. Colour the chloroplasts green. Then label the cell wall.
cytoplasm
cell surface membrane
nucleus
Why do plant cells have: a cell wall _______________________________________________________? b chloroplasts ____________________________________________________? Find out what chromosomes are for. (Hint: You need a key word starting with the letter `g'.) ________________________________________________________________ ________________________________________________________________
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
CLASSIFICATION AND VARIATION
3 How to look at cells
Why do we need a microscope to see cells? _____________________________
slide
Part of microscope Eyepiece lens Objective lens Focussing wheels Slide Stage Mirror
What it is needed for.
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
CLASSIFICATION AND VARIATION
You are going to prepare an onion cell sample to look at using a microscope.
You are going to write a method (instructions) to describe what to do at each step.
Step 1: Getting started
Make a list of what you need and then collect this equipment.
Step 2: Getting the onion skin onto the slide.
WEAR EYE PROTECTION
Watch what your teacher does and list the steps below.
The first one has been done for you. You can use key words from below for your
instructions.
forceps peel slide flat air bubbles Cut a 1cm2 piece of onion.
cover slip tissue
Step 3: Observing the sample under the microscope. Put the following instructions in the correct order. Number them 1 to 5, using 1 for the first thing you will do.
Check that the smallest lens is in place and make sure that the stage is as high as it will go. Put the prepared slide onto stage, and clip it into place.
Turn the microscope on.
Draw what you see.
Turn the focus knob until you get a clear image.
Carry the microscope carefully and plug it in. Make sure that the leads do not dangle from the bench.
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
CLASSIFICATION AND VARIATION
4 Living or non living?
1. Make a set of pictures of things which were never alive. 2. Make a set of pictures of things which have been alive. 3. Make a set of pictures which show living things. Choose a living thing from the pictures above. Draw a picture in each bubble to show how it does these things.
Movement
Growth
Nutrition
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
CLASSIFICATION AND VARIATION
5 Classification
Classification is sorting living organisms into smaller groups based on their features.
Classification of people in a school:
Classification of all living things:
This shows that all living things can be divided into five different groups called kingdoms. The five kingdoms are b___________________ f________________ p____________________ a_______________________ and a_______________________. Use a computer and see if you can find a picture of an organism from each of these groups, along with any other information, and use it to complete the table below.
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
More about kingdoms
Name of kingdom Animal
CLASSIFICATION AND VARIATION
Picture
Features
Examples
Plant
Fungi
Algae
Bacteria
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
Topic 1 Biology
CLASSIFICATION AND VARIATION
6 Vertebrates and invertebrates
Use the words from the box to fill in the blank spaces in the sentences below. Words should only be used once.
backbone bodies crab invertebrates skeleton vertebrates
Animals can be sorted into two main groups called ___________________ and
___________________.
Vertebrates all have a ___________________. Vertebrates also have a
___________________ to support their ___________________.
Some invertebrates have a hard outer shell. One example of an invertebrate is a
___________________. Others like earthworms use water to give them structure.
In the table below list four more examples of vertebrates and four more examples of invertebrates. If possible use a computer to find a picture for each of your examples.
Vertebrates e.g. trout (fish)
Invertebrates e.g. worm
? Pearson Education 2013. Edexcel Entry Level Certificate in Science This material is not copyright free.
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