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Sec 3 Science > chemistry n stuff > Flashcards

chemistry n stuff Flashcards

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1
Q

What is decomposition?

A

A molecule breaking down into it’s components.

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2
Q

What is synthesis?

A

2 molecules combine to make a new one.

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3
Q

What is oxidation?

A

Reaction where oxygen is a reactant.

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4
Q

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

A

Decomposition.

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5
Q

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

A

Synthesis.

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6
Q

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

A

Oxidation.

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7
Q

What is the symbol for density?

A

ρ

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8
Q

What is the symbol for mass?

A

m

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9
Q

What is the symbol for volume?

A

v

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10
Q

What unit is volume represented in?

A

cm cubed or millilitres

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11
Q

What unit is mass represented in?

A

grams

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12
Q

What unit is density represented in?

A

(grams/millilitre)

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13
Q

What are examples of physical changes?

A

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

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14
Q

What are substance changes?

A

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

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15
Q

What are characteristic properties?

A

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

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16
Q

What are signs of a chemical change?

A

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

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17
Q

How do you calculate density?

A

ρ=m/v

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18
Q

How do you calculate volume?

A

v=m/ρ

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19
Q

How do you calculate mass?

A

m=ρxv

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20
Q

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

A

The triangle (look it up in your notes)

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21
Q

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

A

Acid.

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22
Q

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

A

Base.

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23
Q

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

A

Neutral.

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24
Q

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

A

Acid.

25
Q

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

A

Base.

26
Q

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

A

Neutral.

27
Q

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

A

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

28
Q

What do fats do?

A

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

29
Q

What are saturated fats?

A

Fats that come from animal sources.

30
Q

What are non-saturated fats?

A

Fats that come from plants, they are healthier.

31
Q

What are proteins?

A

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

32
Q

What are vitamins vital for?

A

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.

33
Q

What are minerals?

A

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

34
Q

What are examples of minerals?

A

Fe, Na, K, Ca, Mg.

35
Q

What is water?

A

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.

36
Q

Where can you find carbs (carbohydrates)?

A

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

37
Q

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

A

Butter, milk, dairy, cream, meats.

38
Q

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

A

Olive oil, avocados, nuts.

39
Q

Where can you find vitamins?

A

Fruits and vegtables.

40
Q

Where can you find minerals?

A

All foods.

41
Q

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

A

Undergoes mechanical and chemical changes.

42
Q

What is chemical energy?

A

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

43
Q

What is mechanical energy?

A

It is a form of energy related to movement.

44
Q

What is thermal energy?

A

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

45
Q

What is radiant energy?

A

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

46
Q

What is the difference between an element and a compound?

A

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

47
Q

What are chemical changes that happen in the digestive system?

A

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

48
Q

What are physical changes that happen in the digestive system?

A

When the food is broken down into smaller pieces.

49
Q

Is density a characteristic property?

A

Yes. It is.

50
Q

What is are the units for energy?

A

Joules.

51
Q

What are characteristic properties?

A

Melting/freezing point, boiling point, density.

52
Q

What is the stomach lined with?

A

Mucous

53
Q

Are mechanical and physical transformations the same thing?

A

Yep.

54
Q

What is your stomach attatched to?

A

Esophogus and small intestine

55
Q

What are the functions of bile?

A

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

56
Q

What does the small intestine do?

A

It absorbs the nutrients.

57
Q

What are thermal changes?

A

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

58
Q

What does the large intestine do?

A

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

Sec 3 Science (9 decks)

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