Candy Chemistry
What is a mixture?
A combination of two or more substances that are not chemically combined
What does DNA stand for?
Deoxyribonucleic acid
What force pulls all things toward the ground
Gravity
What kind of candy is usually acidic - sweet or sour?
Sour
In candy chromatography, what carries the dyes up the paper?
Water
What shape does DNA have?
A double helix
What helps a boat float
Buoyancy
Shows if something is an acid or base by changing color
What is the name of the process where crystals form as water evaporates?
Crystallization
What do we call A, T, C, and G in a DNA strand
Base pairs
Why do mentos make soda fizz
The rough surface causes bubbles to form quickly - nucleation
Is lemon juice an acid or a base
Acid
What gas makes popping candy pop?
Carbon dioxide
What does your heart rate measure
The number of times your heart beats in one minute
What does "density" mean in science?
How much mass is packed into a certain volume
What number on the pH scale is neutral?
7
What is the difference between a physical and chemical change?
Physical changes don't change the substances idenilty; chemical changes create new substances
What is one way your body responds to exercise
Increased heart rate, sweating, breathing faster
What happens when an object hits a soft surface instead of a hard one?
The soft surface absorbs more energy and reduces the impact
What pH range is considered a base
above 7 to 14