Bill Nye - Chemical Reactions Worksheet with Answers | Science 8th ... - Free Printable

Let’s go through each question one by one. These are fill-in-the-blank questions based on basic chemistry concepts, especially from the Bill Nye episode about chemical reactions. We’ll use simple science knowledge to figure out each answer.

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1. All things are made of c______ which can react when together.
→ Everything is made of tiny building blocks called chemicals. So: chemicals

2. Chemical reactions happen when the e______ hook together.
→ Atoms have parts called electrons that interact during reactions. So: electrons

3. Energy is given off when electrons c______ with other electrons.
→ When electrons “connect” or “combine,” energy can be released. The word here is likely collide (as in bump into each other and react). But sometimes it’s “combine.” Let’s think — in many contexts, it’s “collide.” Actually, in Bill Nye’s style, he often says “collide.” So: collide

4. When water is changed to Hydrogen and Oxygen, it requires e______.
→ Breaking water apart needs energy — like electricity in electrolysis. So: energy

5. When Hydrogen and Oxygen is changed to water, it gives off e______.
→ Making water from H and O releases energy (like in rockets or fuel cells). So: energy

6. Engines are controlled by chemical r______.
→ Engines run on burning fuel — that’s a chemical reaction. So: reactions

7. Always wear safety goggles and rubber g______ when working with chemicals.
→ Safety gear includes gloves. Rubber gloves. So: gloves

8. Fire is a c______ reaction.
→ Fire is a type of chemical reaction — specifically combustion. So: chemical

9. Baking soda and water and vinegar makes a f______ extinguisher.
→ This mix creates foam that puts out fire — so it’s a homemade fire extinguisher. So: fire

10. Another name for sodium chloride is s______.
→ Sodium chloride = table salt. So: salt

11. Pyrotechnicians are people who m______ and use f______.
→ Pyrotechnicians make and use fireworks. So: make, fireworks

12. Fireworks are chemicals and metals r______ to each other.
→ They react with each other to create colors and explosions. So: reacting

13. The air bubbles in a cake are c______ dioxide.
→ Baking soda + acid → carbon dioxide gas → bubbles. So: carbon

14. A chemical reaction happens when chemicals combine to form a new s______.
→ New substance is formed. So: substance

15. Polaroid pictures are made by a fast c______ reaction.
→ It’s a chemical reaction inside the film. So: chemical

16. Some chemicals change c______ when they react.
→ They might change color, temperature, state… but most commonly, we say they change color. In many demos, color change is visible. So: color

17. Vinegar is an a______ and baking soda is a b______.
→ Vinegar = acid; baking soda = base. So: acid, base

18. A cold pack has 2 chemicals that react and become c______.
→ Cold packs get cold — so the reaction absorbs heat, making them cold. So: cold

19. The Periodic Table of Elements is a l______ of all the elements.
→ It’s a list or chart. “List” fits best. So: list

20. Calcium is in m______ and sodium is in s______.
→ Calcium is in milk (dairy), sodium is in salt. So: milk, salt

21. Chemicals that behave the same are grouped t______ in the Periodic Table.
→ Elements in the same column (group) behave similarly. So: together

22. There is a lot of potassium in b______.
→ Potassium is found in bananas. Common fact! So: bananas

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Final Answer:

1. chemicals
2. electrons
3. collide
4. energy
5. energy
6. reactions
7. gloves
8. chemical
9. fire
10. salt
11. make, fireworks
12. reacting
13. carbon
14. substance
15. chemical
16. color
17. acid, base
18. cold
19. list
20. milk, salt
21. together
22. bananas