Science pt2

Question 1

What is decomposition?

Answer 1

The process of breaking down

Question 2

What is synthesis?

Answer 2

The process of putting things together

Question 3

What is solubility?

Answer 3

The amount of solvent that be can be dissolved into a solute

Question 4

What is a pure substance?

Answer 4

It is an element that is made up of only one component

Question 5

What is a heterogeneous mixture?

Answer 5

It is a mixture where you can see the different components with a naked eye

Question 6

What is a homogeneous mixture?

Answer 6

It is a mixture where you can’t see the different components

Question 7

Chemical changes (6)

Answer 7

Formation of precipitate/ change in colour/ formation of gas/ mold or rust/ release or absorption of heat/ emission of light

Question 8

Energy (10)

Answer 8

Kinetic energy: thermal energy/ mechanical energy/ electrical energy/ magnetic energy
Potential energy: chemical energy/ elastic energy/ nuclear energy / gravitational energy

Question 9

What is a multiview projection?

Answer 9

A projection showing all sides of an object (2D)

Question 10

What is an Isometric projection?

Answer 10

3D view of an object as the point and three visible sides that are no on the plane or the paper no side facing towards you

Question 11

What is an oblique projection?

Answer 11

View of an object that has only 1 face in the paper plane (facing you) while the other sides are out of the paper

Question 12

What are the different types of fossils?

Answer 12

• Petrified
• Cast/Mould
• Body
• Trace

Question 13

Where are fossils found?

Answer 13

Found in Sedimentary rocks

Question 14

How are fossils and stratigraphic layers connected?

Answer 14

Both principals apply to fossils as well. Fossils found in the same layer are from the same time period. Older fossils are in the deeper layers .

Question 15

What is relative dating?

Answer 15

Method used to place fossils in order without finding their exact age

Question 16

What is absolute dating?

Answer 16

Method used to find the age of fossils in years.

Question 17

What is a stratigraphic layers

Answer 17

It is a layer of sedimentary rocks that formed in the same time period.

Question 18

What is the law or superposition?

Answer 18

Older layers at the bottom and younger layers at the top.

Question 19

What is the law of original continuity?

Answer 19

All sedimentary rocks contained in a single stratigraphic layer formed in the same time period.

Question 20

How do we mechanically and chemically digests food?

Answer 20

Mechanically: We chew it and the stomach squeezes and churns the food
Chemically: acids and enzymes turn food into liquid form.

Question 21

What is role of the stomach?

Answer 21

The stomach digest mechanically and chemically

Question 22

What is the role of the small intestine?

Answer 22

The small intestine finishes chemical digestion and the absorbs nutrients into the blood.

Question 23

What is the role of the large intestine?

Answer 23

1. Absorbs needed water from the food

2. Package undigested food into waste.

Question 24

Why do we eat?

Answer 24

1) energy
2) body sustainability & growth
3) body & tissue repair

Question 25

How many calories are in each substance?

Answer 25

1g fat -> 9cals 1g protein-> 4cal 1g carbs -> 4cals

Question 26

What nutrients gets burned first?

Answer 26

First: Sugar&carbs Second: fat Third: protein (degrades your muscles to create energy)

Question 27

What is the role of Auricle?

Answer 27

It is the visible part of the ear and it receives sounds and directs them to the auditory canal

Question 28

What is the role Auditory Canal?

Answer 28

A tube lined with fine hairs and glands that secrets earwax and Carrie’s the sound waves to the ear drum

Question 29

What is the role of eardrum?

Answer 29

A thin membrane that vibrates when struck by sound waves

Question 30

What is the role of the ossicles?

Answer 30

Three small bones that vibrate in response to the vibrations of the ear drum. They sometimes amplify the vibrations

Question 31

What is the role of the Eustachian tube?

Answer 31

A tube connecting the ear to the pharynx. Balances the air pressure on both sides of the ear drum

Question 32

What is the role of the cochlea?

Answer 32

Receives and transforms the vibrations coming from ossicles into a nerve impulse to be sent to the cerebrum.

Question 33

What is the role of the vestibular nerve?

Answer 33

Carries the nerve impulse from the semi-circular canals to the cerebrum to help with the balance.

Question 34

What is the role of the auditory nerve?

Answer 34

Carries the nerve impulse from the cochlea to the cerebrum to allow us to hear

Question 35

What are the role of muscles?

Answer 35

Stabilizes joints/maintaining posture/producing movement/moving substances in the body/stabilizing body position/producing heat

Question 36

Which type of muscles controls voluntary movements?

Answer 36

Skeletal muscles

Question 37

Which type of muscles controls involuntary movements?

Answer 37

Smooth and cardiac

Question 38

Where are the muscles located?

Answer 38

Smooth muscles -> inside organs Cardiac muscles -> heart Skeletal muscles -> muscles