Across
- 2. A structure inside the nucleus that makes ribosomes.
- 5. A large molecule that is important for life, such as carbohydrates, proteins, lipids, or nucleic acids.
- 6. A pure substance made of only one kind of atom.
- 8. A type of cell that does not have a nucleus or membrane-bound organelles (example: bacteria).
- 13. The organelle that produces energy for the cell (“powerhouse of the cell”).
- 17. A compound formed when atoms share electrons.
- 18. the smallest unit of an element that keeps the properties of that element.
- 19. Positively charged particles found in the nucleus of an atom.
- 23. A compound formed when electrons are transferred from one atom to another, creating charged ions that attract each other.
- 27. The organelle that packages and ships proteins and other materials.
- 31. An organelle in plant cells where photosynthesis occurs.
- 32. A thin, flexible barrier that controls what enters and leaves the cell.
- 34. Negatively charged particles that move around the nucleus of an atom.
- 35. An uneven distribution of electrical charge in a molecule, causing one end to be slightly positive and the other slightly negative.
Down
- 1. A rigid outer layer that provides support and protection for plant cells.
- 3. The movement of liquid upward through a narrow space due to cohesion and adhesion.
- 4. The control center of the cell that contains DNA.
- 7. A type of cell that has a nucleus and membrane-bound organelles (example: plant and animal cells).
- 9. Acids Small molecules that are the building blocks of proteins.
- 10. A storage sac in the cell that holds water, nutrients, or waste.
- 11. The structure where proteins are made.
- 12. The movement of particles from an area of high concentration to an area of low concentration.
- 14. A membrane system with ribosomes that helps make and transport proteins.
- 15. Anything that has mass and takes up space.
- 16. Attraction between molecules of different substances (example: water sticking to glass).
- 17. The smallest unit of life that can carry out all life processes.
- 20. The diffusion of water across a cell membrane from high water concentration to low water concentration.
- 21. A substance formed when two or more different elements are chemically bonded together.
- 22. Electrons Electrons in the outermost energy level of an atom that are involved in bonding.
- 24. Molecules that provide quick energy for cells, such as sugars and starches.
- 25. The jelly-like substance inside the cell where organelles are found.
- 26. Particles with no charge found in the nucleus of an atom.
- 28. Attraction between molecules of the same substance (example: water sticking to water).
- 29. A membrane system without ribosomes that helps make lipids and detoxify the cell.
- 30. Large molecules made of amino acids that help with structure, growth, repair, and chemical reactions in the body.
- 33. Molecules such as fats and oils that store energy and make up cell membranes.