1. Betsy Sanford 7th Grade Life Science Lost Mountain Middle School
Energy in Cells
Betsy Sanford
7th Grade Life Science
Lost Mountain Middle School

2. For each picture… List all matter represented in the photo.
List all energy represented in the photo.
Explain how the matter and energy are interacting in the photo.

5. Types of Energy Thermal (heat) - Sonic (sound) - Mechanical (motion)
Electromagnetic (radiation including visible light) - Nuclear (inside atoms)
Chemical (stored in the bonds between atoms) - Electrical
Photosynthesis starts with electromagnetic (radiation) energy and ends with chemical energy (glucose).
Cellular Respiration starts with chemical energy and ends with any or all of the following energy: thermal, mechanical, sound, chemical (ATP).

6. Cell Membrane all cells have a cell membrane
it acts as a barrier between the inside and outside of the cell
it controls what goes in and out of the cell

7. Cell Wall located on the outside of the cell membrane
it provides strength, structure and support to the cell
found only in plant and some bacteria cells

8. Cytoplasm fluid inside the cell acts like a shock absorber
keeps the organelles from bumping into one another

9. Vacuole acts as a storage area for the cell
much larger in plants because plants make their own food and need large storage areas

10. Lysosome collects wastes and worn out cell parts
breaks down the wastes for disposal

11. Nucleus the control center of the cell contains DNA
directs all of the cell’s activities
found in all cells except bacteria

12. Cell Energy - Photosynthesis
energy for life comes from the sun – either directly or indirectly
photosynthesis is the process plants, some bacteria and some protists like algae use to capture light and turn it into food
these organisms are called producers or autotrophs

13. Basic Food Chain

14. Basic Food Chain

15. Chloroplast the place inside a cell where photosynthesis happens
found only in plants, some bacteria, and some protists
chlorophyll is the green pigment that soaks up light

16. Cell Energy – Cellular Respiration
animals, fungi, some bacteria, and some protists must consume other living things for energy
cellular respiration is the process these organisms used to breakdown food for energy
these organisms are called consumers or heterotrophs
producers also need to use energy
producers also have mitochondria to breakdown the food they make

17. Mitochondria
the place inside a cell where cellular respiration happens
found in all cells
all living things need to use energy

18. The Energy Cycle the start of photosynthesis is the end of respiration
the start of respiration is the end of photosynthesis

19. Summary Questions
Why do cells have so many parts? What roles do those parts play in helping to keep the cell alive? How do the parts interact?
How do cell organelles work together to supply energy for the cell?
Why do producers have both chloroplast and mitochondria?
How do all living things get energy either directly or indirectly from the sun?
What are some ways to show the energy cycle in an illustration?