PLMAT Flashcards

1
Q

cells

A

smallest living organism and basic unit of life on earth

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2
Q

3 parts of cell

A

membrane, the nucleus, and the cytoplasm

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3
Q

what’s nucleus?

A

contains of the cell’s DNA, sends messages to tell the cell to grow

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4
Q

membrane

A

ensure cell remains separate

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5
Q

cytoplasm

A

interiorof cell that surrounds the nucleus.

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6
Q

Cytoskeleton 💀

A

forms/ helps cell maintain correct shape.

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7
Q

endoplasmic reticulum (ER) 🤛

A

synthesizes, folds, and transports proteins.

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8
Q

Golgi apparatus 📦

A

post office of cell, where items go through packaging

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9
Q

mitochondria 🏠

A

powerhouses of cells.
help turn food into energy that cell can use

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10
Q

Ribosomes

A

Ribonucleic acid (RNA)

Read RNA and translate it into proteins by sticking together amino acids

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11
Q

two typesof cell division

mm

A

@ mitosis
most of cells in the body divide. The “parent” cell splits into two “daughter” cells.

@ meiosis
body produces sperm cells and egg cells.

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12
Q

Cell types? SBBMSEN

A

stem cells
bone cells
blood cells
muscle cells
sperm cell
egg cell
nerve cell

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13
Q

what is blood cell 🩸🩸💉

A

red blood cells - carry oxygen around body

white blood cells - part of immune system

platelets - help blood clot to prevent blood loss

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14
Q

Isaac Newton

A

The Father of Modern Physics

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15
Q

Heat and Thermodynamics

A

Heat- form of energy that produces hotness.

Thermodynamics- deals with the energy relationships involving heat

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16
Q

Methods of heat transfer
CCR

A

Conduction: transfer of heat from hotter body to colder body

Convection: transmission of heat due to movement of medium

Radiation: heat gets transmitted without the action

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17
Q

Types of equilibrium

TMC

A

Thermal equilibrium: temperature of every part of the system is the same as surroundings

Mechanical equilibrium: no unbalanced force

Chemical equilibrium: chemical composition is same throughout system.

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18
Q

Internal Energy ⚡🔌

A

sum total of the kinetic energy

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19
Q

kinetic energy.

A

energy possessed by atoms by virtue of their motion

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20
Q

Work

A

energy spent to overcome an external force.

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21
Q

electromagnetism 🔌

A

produced when electrical flows through conductor

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22
Q

DNA?

A

Deoxyribonucleic acid - carries genetic information

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23
Q

Molecule?

A

group of atoms together

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24
Q

Isaac Newton 2nd Law

A

Law of acceleration

f = ma

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25
Q

Ohms Law

A

current is voltage

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26
Q

NPN BODIES? 🦭

A

Negative
have excess electrons

Positive
deficiency of electron.

Neutral
the same number of protons and electrons.

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27
Q

Law of inertia
Isaac Newton - Law of motions

A

a body at rest will remain at rest
a body in motion will move unless force acts on

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28
Q

Transmutation ➡️⬅️⬆️⬇️

A

changing of one element to another

29
Q

2 types of nuclear reactions
🐠🐋🐟

A

Nuclear fission
splitting of atom

Nuclear fusion
combining nuclei atom

30
Q

Sound

A

a longitudinal wave and mechanical wave.

31
Q

Sound can be transmitted in

A

solid, liquid or gas.

32
Q

Sound is slower than

A

light.

33
Q

Radioactive atoms - ABG

A

alpha particle
beta particle
gamma ray

34
Q

High frequency sound

A

high pitch

35
Q

Low frequency sound

A

low pitch.

36
Q

Sound can exhibit the following properties: RRID

A

reflection (echo and reverberation),
refraction,
interference
diffraction.

37
Q

Doppler Effect 🌊 👋

A

waves is moving with respect

38
Q

laws of reflection state that:

A

a. incident ray, reflected ray, normal lie in the same plane.
b. angle of incidence is equal to the angle of reflection.

39
Q

🤍 Refraction 🤍

A

bending light rays pass an angle from medium to another

40
Q

Lenses form 📹📷

A

images by refraction.

41
Q

Dispersion 🌈

A

separating white light into a band of colors.

42
Q

Diffraction 👀

A

bending light passes through small opening.

43
Q

Interference

A

two beams of light superimposed with one another.

44
Q

Temperature

A

measure of hotness or coldness of body

45
Q

Heat

A

energy in transit from body of higher temperature to lower temperature.

46
Q

Thermal energy 🔥

A

resulting from heat flow

47
Q

Internal energy
=

A

total of all energies in a substance

48
Q

wave

A

a disturbance, travels through a medium

49
Q

2 types of waves

T & L

A

Transverse waves
move up and down perpendicular

Longitudinal waves
move back and forth parallel

50
Q

Highest points of waves are called
🗻

A

crests

51
Q

Low points are called

A

troughs.

52
Q

Amplitude

A

maximum displacement

53
Q

Wavelength

A

distance between two successive crests or successive troughs.

54
Q

Frequency

A

number of crests or troughs that pass a point per second. (Hz).

55
Q

Work

A

force is causing body to move.
In equation,

W = F x d

SI unit of work is Nm or joule.

56
Q

Energy

A

ability to do work.

57
Q

Kinetic energy

A

energy due to motion.

use the equation
KE = 1⁄2 mv2

58
Q

Potential energy

A

energy due to position.
use the equation
PE = mgd.
unit is joule.

59
Q

The kinetic energy of free falling body

.

A

increases while its potential energy decreases.

60
Q

The total mechanical energy of a free falling body

A

remains the same

61
Q

The loss in potential energy

A

equals increase in kinetic energy

62
Q

Power

A

rate of doing work.
In SI it is expressed in watts.



63
Q

atom

A

smallest particle of an element.

64
Q

nucleus

A

small dense core

65
Q

diffusion 🤝

A

intermingling of the molecules

66
Q

The atomic number is also equal to

A

number of electrons.

67
Q

atomic mass or mass number is

S

A

sum of an atom’s protons and neutrons

68
Q

reactants

A

substances that combine

69
Q

mass of the reactants is

A

equal to the mass of the products.