Did you know? The ACT has a science section that tests skills such as analyzing scientific observations. Freezing: the substance changes from a liquid to a solid. Melting: the substance changes from the solid to the liquid. Condensation: the substances changes from a gas to a liquid. Vaporization: the substance changes from a liquid to[…]
These equations are important for SAT and ACT math. – Percent change: (new-old)/old * 100 – Percent error: (experimental-theoretical)/theoretical *. 100
Total mechanical energy = kinetic energy + potential energy Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. It’s the energy in an object due to its motion or position. KE = 0.5mv^2 PE (energy stored in an object) = mass*g*height [g = acceleration due[…]
Molar mass is measured in grams per mole. You may need to calculate molar mass of a compound. This info is found in the periodic table. Example: NaCl has a molar mass of 58.35 (22.9+35.45) Na:22.9 Cl:35.45
– Density = mass/volume – Increasing pressure always raises density. Increasing temperature usually lowers density. When water freezes, it is less dense than liquid water. – Force of a spring = kx k is a constant and x is the amount of stretch or compression. – PE(spring) = 0.5kx^2 – Fahrenheit and Celsius F =[…]
– D=RT distance = rate * time – Position is in meters – Velocity is change in position, in meters per second – Acceleration is change in velocity, in meters per seconds^2 – Relative probability: P(X|Y) = P(X and Y) / P(Y) = probability of X given Y
Did you know that the ACT has a science section that tests your ability to interpret scientific data and make observations about the natural world? Photosynthesis: – Light + water + carbon dioxide –> oxygen and glucose – Occurs in chloroplasts – green pigment is called chlorophyll (only in plants!) – Uses solar energy and[…]
Cellular Respiration: – Occurs in mitochondria – Plants and animals – Converts chemical energy (glucose) to ATP – Solar energy –> photosynthesis—chemical energy –> cellular respiration—ATP – Cell membrane – used for active and passive transport
– Higher temperatures will (usually) increase reaction rate, colder temperatures will (usually) decrease reaction rate. – Amoebas: unicellular, have a nucleus, lack cell wall – Trophic level: the higher in a food chain an organism is, the higher its trophic level is. Producers have a lower trophic level than consumers. – Accuracy vs. Precision in[…]
A circuit is a complete path that electricity flows through. There is a source of electricity (battery). Conductors are the materials that allow electric current to pass through them easily. Conductors like the positive and negative ends of a battery. In a closed circuit, the electricity flows without any interruptions. Ohm’s Law: Voltage (V); Current[…]