Grade 7 Science Chapter 4 Quiz

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Questions and Answers

What is the primary function of a microscope?

To create living organisms in a lab setting

To magnify light sources for better visibility

To analyze chemical compositions of substances

To observe objects that are too small for the naked eye (correct)

Which of the following statements is NOT a part of cell theory?

All cells come from preexisting cells.

All living things are made of one or more cells.

Cells are the basic unit of structure and organization in living things.

Cells can arise from abiotic materials. (correct)

Which scientist is credited with discovering animal cells?

Anton van Leeuwenhoek (correct)

Rudolf Virchow

Matthias Schleiden

Robert Hooke

What is a common laboratory safety protocol when using a microscope?

Handle all glass slides and microscopes with care. Signup and view all the answers

What is one characteristic of living things?

Living things are made of one or more cells. Signup and view all the answers

How did the development of microscopes impact the study of living things?

It allowed the visualization of cellular structures. Signup and view all the answers

Which of the following represents all living things?

Living things use energy and reproduce. Signup and view all the answers

What historical outcome might have occurred without the invention of microscopy?

The discovery of microscopic life forms. Signup and view all the answers

What are the three main ideas encompassed by the Cell Theory?

All living things are made of one or more cells, cells are the basic unit of structure and organization in living things, and all cells arise from preexisting cells. Signup and view all the answers

How did Anton van Leeuwenhoek contribute to the study of cells?

Anton van Leeuwenhoek is known for discovering animalcules, which revealed the existence of microscopic life. Signup and view all the answers

What safety protocol must a student follow when using a microscope?

Students must wear safety goggles and lab coats to protect themselves while using the microscope. Signup and view all the answers

Which part of a microscope should not be looked directly into, and why?

One should not look directly into the microscope light source to avoid eye damage. Signup and view all the answers

What role does the microscope play in cellular biology?

The microscope allows scientists to observe and study cells, contributing to our understanding of life. Signup and view all the answers

How do living things differ from nonliving things based on their cellular composition?

Living things are made of one or more cells, while nonliving things do not possess this cellular structure. Signup and view all the answers

What key functions do cells perform that characterize living organisms?

Cells allow living organisms to grow, reproduce, respond to stimuli, and use energy. Signup and view all the answers

In what way did the discovery of 'animalcules' change scientific understanding during Leeuwenhoek's time?

The discovery of animalcules provided insight into the microscopic world and paved the way for modern biology. Signup and view all the answers

Study Notes

Grade 7 Science

Unit: 2, Chapter: 4 – Cells and Organisms, Lesson 1: Cells: The Basic Unit of Life
Date: November 24, 2024
Teacher: Ms. Joselyn M. Saclolo

Classroom Rules

Be honest and responsible
Use kind words
Listen and follow directions
Raise hand to speak
Treat others with respect
Keep work area clean
Work hard and play safely
Be brave and try new things
Learn from mistakes
Make thoughtful decisions
Do your best
Believe in yourself

Lesson Objective

Students will study the development of the microscope.
Understand its parts and functions
Learn how microscopes advanced scientific discovery.

Laboratory Safety

Always wear safety goggles and lab coats.
Handle all glass slides and microscopes carefully to prevent breakage.
Do not look directly into the microscope light source.
Clean up spills immediately and report any accidents to the teacher.
Follow school safety protocols at all times.

Compound Microscope Parts

Eye piece
Course adjustment knob
Fine adjustment knob
Body tube
Inclination joint
Revolving nose piece
Objective
Condenser
Mirror
Base

Timeline of Microscopy

1285: Glasses invented
1590: Modern Microscope born
1609: Galileo perfects the microscope
1625: Robert Hooke discovers cells
1665: Frits Zernike wins Nobel for Phase Contrast Method
1670: Anthony Van Leeuwenhoek perfects the microscope, Giovanni Faber coins the word "microscope"
1800: Richard Zsigmondy wins Nobel for Ultra Microscope
1926: Max Knoll and Ernst Ruska invent the electron microscope
1931: Antony van Leeuwenhoek perfects microscope
1953:
1986: Tunneling microscope

Vocabulary

Cell: Basic building block of all living things

Starter Activity Questions

What tools did people use to observe objects?
Who invented the microscope?
How did the lack of microscope technology hundreds of years ago affect society?

Living Things and Nonliving Things

Living things reproduce
Living things grow and develop
Living things use energy
Living things are organized
Living things respond to stimuli
Living things are made of one or more cells

Cell Theory

Cell theory is a set of three main ideas related to cells and living things
All living things are made of one or more cells
Cells are the basic unit of structure and organization in living things
All cells come from preexisting cells

Scientists and Their Contributions

Zacharias Jensen (1595): Creates the first compound microscope
Robert Hooke (1665): Views cells in cork, coin term "cell"
Antonie van Leeuwenhoek (1670): Observe living cells in pond water
Robert Brown (1833): Discovers the nucleus in plant cells
Matthias Jakob Schleiden (1838): Proposes that all plant tissues are composed of cells
Theodor Schwann (1839): Concludes that animal tissues are made of cells
Carl Heinrich Braun (1845): Restates that cells are the basic unit of life
Rudolf Virchow (1855): Adds that all cells come from preexisting cells

Assessment: Classwork Activity

Instructions: Match Column A with Column B, writing the letter of the correct answer for questions 1-5.
Column A: Anton van Leeuwenhoek, Cell, Cell Theory, Theodor Schwann, Matthias Schleiden
Column B: A. Discovered plants are made of cells, B. Discovered animals are made of cells, C. A set of three main ideas about cells and living things, D. Basic building block of living things, E. Uses microscopes with pond water

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Description

This quiz focuses on Cells and Organisms, specifically Lesson 1 about cells as the basic unit of life. Students will explore the development and functionality of the microscope, essential for scientific discoveries. Test your knowledge on these key concepts and laboratory safety guidelines.