Law of Conservation of Mass
What does the Law of Conservation of Mass state?
Matter cannot be created or destroyed
What does acceleration depend on?
force and mass
What two things are used to classify stars on the HR diagram?
luminosity and temperature
What is the main source of energy that drives Earth's weather?
the Sun
What are the two types of ecological succession?
Primary & Secondary Succession
A chemical reaction begins with 25 g of reactants. After the reaction occurs, 25 g of product is measured. Does this follow the law of conservation of mass?
Yes
What is the formula for force? What is the formula for acceleration?
F = ma
A = f/m
What stage is our Sun currently in?
Main sequence
What type of heat transfer occurs when warm air rises and cool air sinks?
Convection
What are the first organisms to grow in an area during succession called?
Pioneer species, lichens and moss
Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O...
Ca(OH)2 = 74 g
H2SO4 = ?
CaSO4 = 136 g
2H2O = 36 g
How many grams of sulfuric acid were used in the reaction?
98 g
Two students push identical carts. Once cart accelerates faster than the other. What must be different about the pushes?
The force applied
What large cloud of gas and dust forms new stars?
Nebula
What does a hurricane need in order to form?
warm water and low pressure
What is the function of a pioneer species?
Form soil
Two solutions are mixed and react to produce the solid precipitate AgCl. The chemical reaction is shown by the balanced chemical equation. AgNO3 + NaCl --> AgCl + NaNO3. What happens to the total mass as the reaction takes place?
The mass remains constant
A force of 30 N is applied to an object with a mass of 10 kg. What is the acceleration?
3 m/s2
What is the explosive death of a massive star called?
Supernova
What causes convection currents within the atmosphere?
The uneven heating of Earth by the Sun
A stable ecosystem is called...
Climax community
CaCO3 ---> CaO + CO2...The mass of CaO is 28 g, the mass of CO2 is 21.97 g. What is the mass of CaCO3?
49.97 grams
A student pushes a 51.5 kg bookshelf across a smooth floor with a net force of 67 N. What is the approximate acceleration of the bookshelf?
1.3 m/s2
On an H-R diagram, where would you find a star that very bright but has a low surface temperature?
giant or supergiant region
How do the Sun, atmosphere, and hydrosphere work together to influence weather?
The Sun provides energy, the atmosphere moves heat and air, and hydrosphere (water) stores and redistributes heat
Ecosystems with greater ________ are more _______.
biodiversity, sustainable