Science activity

2. The colorless fluid part of blood
5. The force that attracts a body towards the centre of the earth
6. The change in position of an object over time
8. A group of similar cells that work together to perform a specific function
9. A subatomic particle in all atomic nuclei with a positive electric charge
10. The main substance that makes up the cell walls of plants
12. The control center of a cell containing genetic material
13. The resistance that one surface or object encounters when moving over another

1. A substance consisting of atoms which all have the same number of protons
3. A homogeneous mixture composed of two or more substances
4. A space or vesicle within the cytoplasm of a cell typically containing fluid
6. A material made up of two or more different substances not chemically combined
7. The tendency of an object to resist a change in its motion
10. A substance formed when two or more chemical elements are chemically bonded
11. The capacity to do work