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Lesson ⁦1-1⁩: Cells

Science · Fourth Grade, Primary · Unit 1: Kingdoms of Living Things · First Semester

A 10-question quiz; after every question you'll see the right answer with an explanation.
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What will you learn in this lesson?

The cell is the smallest living unit, and the bodies of all living things, from the palm tree to the human, are made of cells. In this lesson you learn the parts of the cell and their functions, and the difference between a plant cell and an animal cell.

  • Defines the cell as the basic building unit of living things
  • Names the main parts of the cell: the cell membrane, the cytoplasm, and the nucleus
  • Compares plant and animal cells in terms of the cell wall, chloroplasts, and the vacuole
  • Uses a microscope to observe cells and describes what they see

💡 Tip: Draw two cells side by side, a plant cell and an animal cell, and color what only the plant cell has: the cell wall, the chloroplasts, and the large vacuole.

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Ghada explains the lesson and answers your questions about it. Log in to get started.

Worked examples from the Cells lesson questions

What is the basic unit that all living things are made of?
  • The cell
  • The tissue
  • The organ
  • The organ system
✓ The cell
All living things are made of one or more cells, and the cell is the smallest living unit.
What tool do we use to see cells?
  • The microscope
  • The telescope
  • The magnet
  • The scale
✓ The microscope
Most cells are too small to be seen with the naked eye, and the microscope magnifies them so we can see them.
Show more examples (3)
Which part of the cell controls its activities?
  • The nucleus
  • The cell membrane
  • The cytoplasm
  • The vacuole
✓ The nucleus
The nucleus is the control center of the cell; it directs its growth and activities.
Which part surrounds the cell and controls what enters and leaves it?
  • The cell membrane
  • The nucleus
  • The chloroplasts
  • The vacuole
✓ The cell membrane
The cell membrane (plasma membrane) surrounds the cell, lets useful substances pass through, and keeps others out.
Which structures are found in the plant cell and make food?
  • Chloroplasts
  • The nucleus
  • The cytoplasm
  • The cell membrane
✓ Chloroplasts
Chloroplasts use sunlight to make food, and they are not found in the animal cell.

FAQ about the Cells lesson

What is the difference between a plant cell and an animal cell?

A plant cell has a cell wall that gives it a fixed shape, chloroplasts where it makes food, and a large vacuole. An animal cell has no cell wall and no chloroplasts, and its vacuoles are small.

Why is the nucleus called the control center of the cell?

Because it carries the information that directs all of the cell's activities, such as growth, division, and making the substances the cell needs.

How do I study the lesson Cells and test myself on it?

Start the lesson quiz on Study with Ghada: 10 questions from the Science Fourth Grade, Primary question bank. After each answer you'll see the right answer with an explanation, and any questions you miss move to “Review my mistakes” until you master them.

Are Study with Ghada quizzes free and aligned with the curriculum?

Yes, completely free. They're built on the Science - Grade 4 - Semester 1 lessons in the same order as the book, and every question is reviewed and approved by a teacher before students see it.

Unit 1 lessons: Kingdoms of Living Things

⁦1-2⁩ Classifying Living Things All Science Fourth Grade, Primary lessons →
⁦1-2⁩ Classifying Living Things →