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Across 1. Organelle found in cells and it is where respiration occurs to release energy. 6. pulls a ball down when you throw it in the air - non contact force 7. Organelle that contains a green pigment called chlorophyll 9. Made up of lots of cells working together to do the same job. 10. Hooke's law states that when a load is added to a spring the force it exerts is proportional to its _____________________. 11. This is the variable you measure in an experiment 14. A non contact force that attract your hair to a balloon or causes 2 balloons to repel each other. 19. Speed is calculated from ______________ divided by time 20. Measured in Newtons 22. The force that keeps a book from falling through a table. 23. This type of cell has an axon and can be very long; it carries messages 24. amount of matter 25. This tells us how fast an object covers a distance 26. Cells specialised to make food in plants

Down 2. enables a parachutist to fall slowly; you feel it when you ride a bike fast. 3. An organ in the body that is made up of muscle tissue, nervous tissue and glandular tissue. 4. This happens to an object when the forward force is suddenly greater than the backward force. It ____________ 5. A plant cell specialised in absorbing water from the soil 8. allows a rock climber to abseil safely down a rope. 12. Small round cell that can squeeze through the tiniest blood vessels. They have no nucleus. 13. A force that pulls on steel objects such as paper clips 15. One of the largest cells found in the human body 16. This force opposes movement 17. A force that enables you to float on water 18. Value of a resultant force when forces acting on an object are zero 21. When forces are balanced a car could be stationary or moving at a ____________ speed.