Chemistry
What pH does water have?
Why do cells need to divide?
Reproduction, growth, repair
What is a substance that transfers heat/radiaiton from one place to another?
A medium
What ionic compound do these make?
Na+ + Cl-
NaCl
True or false: Acids have a pH lower than 5.
True
How do atoms become cations and anions?
Atoms become cations when they lose electrons.
Atoms become anions when they gain electrons.
This is when the concentration of molecules inside and outside of a cell become the same.
Diffusion
If a light ray with an angle of incidence of 29 degrees is hitting a plane mirror, what would be the angle of reflection?
29 degrees
The speed of light for air is 3.00 x 10 m/s. The speed of light for glass is 1.97 x 10 m/s. What is the refractive index of glass?
n = c/v
n = 1.52
Name three properties of molecular (covalent) compounds.
Properties: Solid/liquid/gas at room temperature, weak bond (because electrons are shared), soft and flexible (solids), low melting & boiling point
Name three properties of ionic compounds.
Ionic compounds are salts (like road salt, table salt, etc.)
Properties: Solid at room temperature, crystalline structure, strongly bonded, rigid and brittle, high melting & boiling point, repeating arrangement of ions
What is the name of the thing you put your eye up to when you look in a microscope?
Ocular lens
True or false: F & C are in front of a convex mirror.
False.
An object is placed 20 cm in front of a lens. The image formed is 12 cm from the lens. What is the focal length of the lens and what type of lens is it?
1/do + 1/di = 1/f
f = 7.52 cm
Therefore, the focal length is 7.52 cm. This is a converging lens, because the focal length is a positive number.
What’s the difference between mitosis and cytokinesis?
Mitosis: Separation of DNA/chromosones
Cytokinesis: Separation of cytoplasm & organelles
Write these as formulas/words:
1. carbon tetrafluoride
2. P₃S₄
3. dihydrogen monoxide
1. CF₄
2. triphosphorus tetrasulphide
3. H₂O
What is the difference between benign and malignant tumors?
Benign: harmless, doesn’t spread to other body parts, squishes nearby tissues if large enough
Malignant: spreads to other body parts through bloodstream, interferes with normal cell functions, invades nearby tissues
This is an electromagnetic energy wave, made of 2 parts: an electric field and a magnetic field. What is it?
Radiation
Balance these chemical equation and name what type of reaction they are.
1. CaCO3 + KNO3 ➡️ Ca(NO3)2 + K2CO3
2. Fe + O2 ➡️ Fe2O3
1. CaCO3 + 2 KNO3 ➡️ Ca(NO3)2 + K2CO3 (Double displacement)
2. 4 Fe + 3 O2 ➡️ 2 Fe2O3 (Synthesis)
Which one has greater energy on the electromagnetic scale - x-rays or microwaves?
X-rays
This reaction is a quick reaction of a substance with oxygen to produce energy (heat/light/sound), also known as burning.
Provide an example.
Combustion reaction
Fireworks, fire, bombs, etc.
Name the phases of mitosis. (Bonus points for describing what happens in each stage!!)
Prophase, metaphase, anaphase, telophase
What are the rules for locating images in curved mirrors?
1. Light rays parallel to PA will reflect through F.
2. Light aimed through F will reflect parallel to PA.
3. Light aimed through C will reflect back to C.
4. Light aimed at V will use PA as the normal and reflect with the same angle.
A statue with a height of 15 cm is placed in front of a converging lens. An inverted image of height 38 cm is on the other side of the lens. What is the magnification of the lens?
M = hi/ho
M = -2.53
Therefore, the lens is magnified by -2.53.
Name the parts of the circulatory system. (Bonus points for what they do and the order the blood goes through!!)
- Heart: Left atrium, left ventricle, right atrium, right ventricle
- Veins
- Arteries
- Capillaries
- Valves