Current Science Topics Review

3. Tendency of water molecules to stick together due to the force of attraction between them
5. Substance(s) before a chemical reaction in a chemical equation
9. Small numbers written to the right and below the element symbol that tell you how many atoms
11. Used to determine which elements are given in a chemical equation
12. Have a pH greater than 7, a bitter taste, and are slippery to the touch
15. When combined to form a _____________, substances do not undergo a chemical change
16. Mixtures that have a uniform composition
19. Rate of change of velocity; increase or decrease in speed and change in direction
21. Water has a ________ surface tension due to the cohesive forces, allowing small objects to float
22. Scale used to measure the acidity or basicity of solutions
24. Another word for a homogeneous mixture
25. How many molecules are present in the formula 4Fe2O3?
26. Pure substance that contains only one type of atom; cannot be broken down chemically
27. The pH of a neutral substance
29. If the mass of an object does not change, but the force acting on it increases, what happens to the acceleration of the object?
30. Pick the compound out of the following list: table salt, soil, sodium, cement
32. Type of paper used to measure the pH of substances
34. Compound that is a colorless, odorless, and tasteless liquid at room temperature

1. Pick the element out of the following list: glucose, coffee, aluminum, salad
2. Choose the acid in the following examples: ammonia, bleach, soda
4. A measure of how difficult it is to break the surface of a liquid
6. The total mass of all reactants must ________ the total mass of all the products after a reaction
7. Substance(s) after a chemical reaction in a chemical equation
8. A push or a pull on an object, measured in Newtons
10. In a heterogeneous mixture, parts of the mixture are easily distinguishable and can be __________
13. Ability of water molecules to stick to other surfaces or materials
14. Choose the base in the following examples: lemon juice, antacid, vinegar
17. Mixtures that do not have a uniform composition
18. Amount of matter in an object, measured in grams or kilograms
20. Composed of two or more elements chemically combined; represented by a chemical formula
23. Large numbers written to the left of a chemical formula that tell you how many molecules
28. These organisms use cohesion and adhesion to uptake water through their root systems
31. Have a pH less than 7 and a sour taste
33. Cohesion is responsible for the formation of water droplets in this shape