(628)-272-0788 info@etutorworld.com
Select Page

How do Living Organisms Get Energy? (Worksheets and Explanation)


Grade 6 Science Worksheets

How do Living Things get Energy?

Every cell carries out several important functions to stay alive. (See: Parts of a Cell). These functions are possible because the cell obtains energy to do so. Energy is being continuously obtained through chemical reactions to keep the cell and the entire organism alive and healthy. These chemical reactions that take place in a cell are called the cell’s Metabolism. Where does it get the energy to do so? A cell requires food just as you and I do. How does it obtain this food and how does it convert food to energy? Through a process called Respiration. Put your knowledge to the test with this challenging 6th Grade Science Worksheet! Read each question carefully and choose the response that you feel is correct.

Schedule a Free session to clear worksheet doubts

No credit card required, no obligation to purchase.
Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!


Respiration is the process by which all living organisms obtain and use oxygen. Almost all living organisms require oxygen to live. A plant or animal takes in oxygen from its environment and releases carbon dioxide. In animals, oxygen is then carried in the blood by the circulatory system to each and every cell of its body. Inside the cells, oxygen is used in chemical reactions to release energy and produce carbon dioxide and water as waste products. This is called cellular respiration. The carbon dioxide released is carried back to the lungs in the blood which is breathed out by the organism.

Let us look at cellular respiration in some more detail. Doubts? A 6th-grade science tutor can help.

Cellular Respiration

A series of chemical reactions take place within a cellular structure in the presence of oxygen. These reactions release energy from food substances obtained by the cell and make it available for various cell functions.

Mitochondria present in the cytoplasm of the cell is responsible for cellular respiration. They are the power producers of the cell. Cells obtain food from all that living organisms eat – typically carbohydrates, proteins, and fats. This food is converted into glucose and burned in the presence of oxygen inside the mitochondria to generate energy. The only form of energy a cell can use is a molecule called ATP (adenosine triphosphate). These chemical compounds run the cell’s activities. They help to make proteins in the cell, to make a muscle cell contract, or to make a nerve cell send a message, and so on. Cells requiring more energy have more mitochondria, such as the heart, liver or muscle cells.

Cellular Respiration Cycle Diagram

eTutorWorld Understands Math Tutoring | Online Math Worksheets are Important Tools

Understanding graphs, charts, and opinion polls in a newspaper, for calculating house and car payments, and for choosing a long-distance telephone service are impossible without strong math skills …and the only way to develop strong math skills is by constant practice.

‘Practice makes a man perfect’ holds true for no other field better than for math. A middle or high school student must set aside a minimum of an hour for math every day. Other than textbooks, worksheets help you revise and understand concepts better.

Our expert tutors prepare online maths worksheets that are age and grade-appropriate. Grade-wise math worksheets for Elementary Math, Arithmetic, Pre-Algebra, Algebra, Geometry, Trigonometry, Statistics, Pre-Calculus and Calculus can be solved to improve math skills, to get ahead or to even catch up.

You may download these FREE online math worksheets in the PDF format, and then print and email us their solutions for a free evaluation and analysis by eTutorworld’smath expert tutors.

You may solve these worksheets by yourself or with your peers while studying together.

The Answer Key at the end of each worksheet allows for a self-evaluation.

Personalized Online Tutoring

eTutorWorld offers affordable one-on-one live tutoring over the web for Grades K-12, Test Prep help for Standardized tests like SCAT, CogAT, MAP, SSAT, SAT, ACT, ISEE and AP. You may schedule online tutoring lessons at your personal scheduled times, all with a Money-Back Guarantee. The first one-on-one online tutoring lesson is always FREE, no purchase obligation, no credit card required.

For answers/solutions to any question or to learn concepts, take a FREE CLASS.

No credit card required, no obligation to purchase.
Just book a free class to meet a tutor and get help on any topic you want!

Plant Respiration

Respiration in plants occurs through the process of Photosynthesis – using energy from sunlight to combine carbon dioxide and water to make food. Plant leaves contain a pigment called Chlorophyllwhich is essential in the process of photosynthesis to produce vital sugars. These sugars are stored in the form of food in special organelles called Chloroplastsfound inside plant cells. These sugars, combined with other nutrients from the soil, such as nitrogen, sulfur, phosphorus, help plants make starch, fat, protein, vitamins, and other complex compounds essential for life. Photosynthesis provides the chemical energy needed to produce these compounds.

Check Point

  1. A cell converts food to energy through a process called ______.
  2. The part of respiration taking place inside a cell is known as ______.
  3. Organelles named ______ in the cytoplasm of a cell are responsible for cellular respiration.
  4. A pigment called ______ is essential in the process of photosynthesis to produce vital sugars.
  5. Plant respiration occurs through the process of ______.

Answer Key

  1. Respiration
  2. Cellular
  3. Mitochondria
  4. Chlorophyll
  5. Photosynthesis

Schedule a Free session to clear worksheet doubts

No credit card required, no obligation to purchase.
Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!

Pricing for Online Tutoring

Tutoring PackageValidityGrade (1-12), College
5 sessions1 Month$139
1 session1 Month$28
10 sessions3 months$269
15 sessions3 months$399
20 sessions4 months$499
50 sessions6 months$1189
100 sessions12 months$2249

Images Credit: