chemistry n stuff

Question 1

What is decomposition?

Answer 1

A molecule breaking down into it’s components.

Question 2

What is synthesis?

Answer 2

2 molecules combine to make a new one.

Question 3

What is oxidation?

Answer 3

Reaction where oxygen is a reactant.

Question 4

If H<2O<1 became 2H<2+O<2 what chemical change is that? (<2 means its small)

Answer 4

Decomposition.

Question 5

If SO<2+H<2O becomes H<2SO<3 what chemical change is that? (‘

Answer 5

Synthesis.

Question 6

If 4Fe+3O<2 becomes 2Fe<2O<3 what chemical change is that? (‘

Answer 6

Oxidation.

Question 7

What is the symbol for density?

Answer 7

ρ

Question 8

What is the symbol for mass?

Answer 8

m

Question 9

What is the symbol for volume?

Answer 9

v

Question 10

What unit is volume represented in?

Answer 10

cm cubed or millilitres

Question 11

What unit is mass represented in?

Answer 11

grams

Question 12

What unit is density represented in?

Answer 12

(grams/millilitre)

Question 13

What are examples of physical changes?

Answer 13

Changes in shape, dissolution (dissolving), phase changes.

Question 14

What are substance changes?

Answer 14

Condensation, evaporation, melting, freezing, sublimation and deposition.

Question 15

What are characteristic properties?

Answer 15

Melting point, boiling point, density, electric conductivity and magnetism, solubility, reaction to indicators (pH stuff)

Question 16

What are signs of a chemical change?

Answer 16

Smell or bubbles (gas is produced), change in colour, emission of heat or light, electricity produced, precipitation.

Question 17

How do you calculate density?

Answer 17

ρ=m/v

Question 18

How do you calculate volume?

Answer 18

v=m/ρ

Question 19

How do you calculate mass?

Answer 19

m=ρxv

Question 20

What’S a trick to help you find density, volume or mass?

Answer 20

The triangle (look it up in your notes)

Question 21

When you use a blue litmus paper and it turns red, what is it?

Answer 21

Acid.

Question 22

When you use a blue litmus paper and it stays blue, what is it?

Answer 22

Base.

Question 23

When you use a blue litmus paper and it stays blue, what is it?

Answer 23

Neutral.

Question 24

When you use a red litmus paper and it stays red, what is it?

Answer 24

Acid.

Question 25

When you use a red litmus paper and it turns blue, what is it?

Answer 25

Base.

Question 26

When you use a red litmus paper and it stays red, what is it?

Answer 26

Neutral.

Question 27

What do carbs contain, what do they get transformed into?

Answer 27

Carbs contain glucose or other substances that release sugars during digestion (starch). They get transformed into energy.

Question 28

What do fats do?

Answer 28

They provide the body with energy and store it. They insulate the body and cushion the vital organs.

Question 29

What are saturated fats?

Answer 29

Fats that come from animal sources.

Question 30

What are non-saturated fats?

Answer 30

Fats that come from plants, they are healthier.

Question 31

What are proteins?

Answer 31

Big molecules made of long chains of amino acids. They allow the body to build and repair cells.

Question 32

What are vitamins vital for?

Answer 32

They are vital for various body functions and to help regulate metabolism and chemical reactions in the body. There are 13 types of vitamins in the body.

Question 33

What are minerals?

Answer 33

They are simple chemical elements. Minerals make up various tissues like cartilage, teeth, bones and nerves.

Question 34

What are examples of minerals?

Answer 34

Fe, Na, K, Ca, Mg.

Question 35

What is water?

Answer 35

A pure substance that makes up 60% of the body. It is important to many chemical reaction, regulates metabolism and helps to carry substances to different parts of the body.

Question 36

Where can you find carbs (carbohydrates)?

Answer 36

In bread, rice, cereal, pasta (those are the main sources).

Question 37

Where can you find saturated fats? (what foods?)

Answer 37

Butter, milk, dairy, cream, meats.

Question 38

Where can you find un-saturated fats? (what foods)

Answer 38

Olive oil, avocados, nuts.

Question 39

Where can you find vitamins?

Answer 39

Fruits and vegtables.

Question 40

Where can you find minerals?

Answer 40

All foods.

Question 41

What does the food do when it enters and exists the digestive system?

Answer 41

Undergoes mechanical and chemical changes.

Question 42

What is chemical energy?

Answer 42

A form of energy found in the bond that keeps the atoms of a molecule together.

Question 43

What is mechanical energy?

Answer 43

It is a form of energy related to movement.

Question 44

What is thermal energy?

Answer 44

It is a form of energy caused by the motion of particles in matter.

Question 45

What is radiant energy?

Answer 45

It is the form of energy that's contained light and other electromagnetic waves.

Question 46

What is the difference between an element and a compound?

Answer 46

An element has 1 type of atom. A compound has 2.

Question 47

What are chemical changes that happen in the digestive system?

Answer 47

When foods are broken down (dissolved?) in the stomach.

Question 48

What are physical changes that happen in the digestive system?

Answer 48

When the food is broken down into smaller pieces.

Question 49

Is density a characteristic property?

Answer 49

Yes. It is.

Question 50

What is are the units for energy?

Answer 50

Joules.

Question 51

What are characteristic properties?

Answer 51

Melting/freezing point, boiling point, density.

Question 52

What is the stomach lined with?

Answer 52

Mucous

Question 53

Are mechanical and physical transformations the same thing?

Answer 53

Yep.

Question 54

What is your stomach attatched to?

Answer 54

Esophogus and small intestine

Question 55

What are the functions of bile?

Answer 55

It helps with digestion, it breaks down fat into fatty acids.

Question 56

What does the small intestine do?

Answer 56

It absorbs the nutrients.

Question 57

What are thermal changes?

Answer 57

When any type of energy changes to thermal energy or when thermal energy changes to another type of energy.

Question 58

What does the large intestine do?

Answer 58

It absorbs the water, vitamins and minerals into the bloodstream to get rid of solid waste.