1. Cells are the basic unit of all living things, similar to how bricks make up walls. Cells are too small to see without a microscope. 2. Cells have a membrane surrounding the cytoplasm and organelles like the nucleus and mitochondria. The organelles work together to keep the cell alive. 3. There are single-celled microorganisms as well as multicellular organisms made of many cells. The DNA in the nucleus provides instructions to the cell. Cells with or without a nucleus are called eukaryotic or prokaryotic cells, respectively.

1. Read this text while noticing the highlighted words.
made need see surrounded inside called work gives floating means have
The cell
Every living thing is made up of cells, just as walls are made of bricks. So, what is a cell?
Cells are so small you need a microscope to see them. All cells are surrounded by a sort of skin
called the cell membrane. The jelly-like stuff inside is called the cytoplasm. Inside there are little
organs called organelles. There are many different kinds of organelles like the nucleus or the
mitochondria (breathing organelle). All the organelles work together to keep the cell alive.
Are there one-celled living things? Yes, there are. Microorganisms are made of a single little cell.
The DNA or deoxyribonucleic acid is the "command center of the cell". It gives the cell instructions
about what to do. In humans, other animals and in plants, the DNA is inside the nucleus. That's
why the nucleus is the most important organelle. Cells that have a nucleus are called eukaryotic
cells.
Other cells don't have a nucleus. The DNA is floating around in the cell's cytoplasm. Cells that
don't have a nucleus are called prokaryotic cells. Eu- means they do, Pro- means they don't.
Bacteria, like the ones in yogurt, have prokaryotic cells.

2. Listen to your teacher and fill in the blanks using the words in the word cloud:
THE CELL
Every living thing is ________up of cells, just as walls are made of bricks. So, what is a cell?
Cells are so small you ________ a microscope to ________ them. All cells are __________ by a
sort of skin called the cell membrane. The jelly-like stuff inside is called the cytoplasm.
________ there are little organs ____________ organelles. There are many different kinds of
organelles like the nucleus or the mitochondria (breathing organelle). All the organelles ______
__________ to keep the cell alive. Are there one-celled living things? Yes, there are.
Microorganisms are made of a single little cell.
The DNA or deoxyribonucleic acid is the "command center of the cell". It _________ the cell
instructions about what to do. In humans, other animals and in plants, the DNA is inside the
nucleus. That's why the nucleus is the most important organelle. Cells that have a nucleus are called
eukaryotic cells.
Other cells don't have a nucleus. The DNA is _________ around in the cell's cytoplasm. Cells that
don't have a nucleus are called prokaryotic cells. Eu- _______they do, Pro- means they don't.
Bacteria, like the ones in yogurt, ________ prokaryotic cells.