CHEMISTRY
what are 5 clues of a chemical change
A new colour appears, bubbles of gas formed, a precipitate forms, heat/light produced, irreversible/difficult to reverse
what organ system is responsible for transporting nutrients, water, and waste?
circulatory system..?
what is reflection/refraction
reflection is light bouncing off a surface/refraction is the BENDINGGG of light off a surface
what can muscles in the eye do?
muscles in the eye can change shape of lens + size of the pupil
difference between weather and climate
weather is the temperature/conditions at a place and time
climate is average weather conditions in a region over a long period of time
NAME THE REACTIONS
1. A+B=AB
2. A + BC = AC + B
3. AB = A + B
4. AB + CD = AD + CB
1 = synthesis
2 = single displacement
3 = decomposition
4 = double displacement
what are accessory organs (for each system)
circulatory = lungs, spleen, blood vessels, bone marrow
respiratory = nose, pharynx, larynx, bronchi
digestive = liver, pancreas, galbladder, salivary glands, teeth, tongue
differnence between diffuse mirrors and plane mirrors
plane mirrors = clear image, specular reflection
diffuse mirror = distorted image, diffuse reflection
what is the lens
focuses light onto the retina
what caused more CO2 in atmospheres
burning of fossil fuels, driving cars, factories, etc
which number on the pH scale is represents a neutral substance
7
What is cell differentiation
a process that allows specialized cells to develop from unspecialized cells
examples of both concave (converging), and convex (divergng) mirrors
concave - spoons, vanity mirrors, telescopes
convex - surveillance mirrors, car mirrors, side ons
what types of photo receptor cells are in the retina + explain them
rods are sensitive to light intensity + more rods can pick up lower levels of light easier, nocturnal
cones detect wavelengths of light, diff light wavelengths = diff colours
what is the greenhouse effect
greenhouse effect = natural process where gases + clouds absorb infrared radiation from Earth's atmosphere, radiate it back, some gets trapped keeping Earth's surface, and atmosphere
what is the law of conservation of mass
total mass of reactants equals total mass of products
which side gives/recieves deoxygenated, and oxygenated blood
blood from heart to lungs is deoxygenated (blue blood), from lungs to heart is oxygenated (red blood)
examples of indicators to test acidity/basicity
litmus paper = red in acid, blue in base
bromothymol blue = yellow in acid, blue in base
methyl orange = red in acid, yellow in base
what is the red eye effect
when a light flashes and a large amount of light enters the pupil so quickly that the iris doesnt have time to adjust so light reflects off blood vessels in the retina and u see the red eyes
what was the Conference of Parties 21 Paris Ageement of 2015
was 2 limit global warming to below 2 degrees calcius, globally reduce greenhouse gas emissions, net-zero emissions goal by 2nd half of 21st century, support developing countries with climate finance, technology + capacity building
what is the word eq: methane + oxygen = carbon dioxide + water
as a chemical eq (bonus: balance)
Ch4 + O2 = CO2
Ch4 + 3 O2 = CO2 + 2 H2O
define malignant tumour, benign tumour, carcinogen
malignant tumours = bad + harmful, benign tumour = bad + not harmful, carcinogen = cancer causing substance
what is total internal reflection?
total internal reflection is when light travels from more dense to less dense medium at an angle more than the critical angle (causing light to reflect entirely w medium)
label eyeball from left to right (start to finish)
cornea, iris, pupil, lens, retina, optic nerve
ocean acidification is is an evironmental issue caused by too much CO2 from the atmosphere dissolving in seawater which makes it harder for corals + shell building organisms to survive